California Building Standards Code
2025 California Plumbing Code (Title 24, Part 5)
Part 5 of Title 24 — Plumbing, drainage, venting and water-supply requirements.
- Edition
- 2025
- Effective
- 2026-01-01
- Last ingested
- 2026-07-06
- Jurisdiction
- California
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2025 California Plumbing Code Converted from PDF using pymupdf4llm Source: 2025 California Plumbing Code.pdf Text ratio: 100.0% Conversion date: 2025-12-23 23:37:07 --- ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. CALIFORNIA BUILDING STANDARDS COMMISSION CALIFORNIA 2025 PLUMBING CODE CALIFORNIA CODE OF REGULATIONS I TITLE 24 PART 5 ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or…
301.7 One- and Two-Family Dwellings . .50 ¶
301.7 One- and Two-Family Dwellings . .50
301.8 OSHPD 1R . . . . . . . . . . . . . . . . . . .50 ¶
301.8 OSHPD 1R . . . . . . . . . . . . . . . . . . .50 302.0 Iron Pipe Size (IPS) Pipe . . . . . . . .50 302.1 General . . . . . . . . . . . . . . . . . . . . . .50 303.0 Disposal of Liquid Waste . . . . . . . .50 303.1 General . . . . . . . . . . . . . . . . . . . . . .50 304.0 Connections to Plumbing System Required . . . . . . . . . . . . . .50 304.1 General . . . . . . . . . . . . . . . . . . . . . .50 305.0 Damage to Drainage System or Public Sewer . . . . . . . . . . . . . . .51 305.1 Unlawful Practices . . . . . . . . . . . . .51 306.0 Industrial Wastes . . . . . . . . . . . . . .51…
310.14 Services/Systems and Utilities . . . .52 ¶
310.14 Services/Systems and Utilities . . . .52
310.15 Telephone and Data ¶
310.15 Telephone and Data Equipment Rooms . . . . . . . . . . . . .52 311.0 Independent Systems . . . . . . . . . . .52 311.1 General . . . . . . . . . . . . . . . . . . . . . .52 312.0 Protection of Piping, Tubing, Materials, and Structures . . . . . . . .52 312.1 General . . . . . . . . . . . . . . . . . . . . . .52 312.2 Installation . . . . . . . . . . . . . . . . . . .52 312.3 Building Sewer and Drainage Piping . . . . . . . . . . . . . . . . . . . . . . .52 312.4 Corrosion, Erosion, and Mechanical Damage . . . . . . . . . . . .52 312.5 Protectively Coated Pipe . . . . . . . .52 312.6…
321.0 Essential Plumbing Provisions . . . .54 ¶
321.0 Essential Plumbing Provisions . . . .54
322.0 Psychiatric Services . . . . . . . . . . . .54 ¶
322.0 Psychiatric Services . . . . . . . . . . . .54
323.0 Plumbing Equipment Schedules . . .55 ¶
323.0 Plumbing Equipment Schedules . . .55 Table 313.3 Hangers and Supports . . . . . . . . . .55 CHAPTER 4 PLUMBING FIXTURES AND FIXTURE FITTINGS . . . . . . .57 401.0 General . . . . . . . . . . . . . . . . . . . . . .59 401.1 Applicability . . . . . . . . . . . . . . . . . . .59 401.2 Quality of Fixtures . . . . . . . . . . . . .59
401.3 Water-Conserving Fixtures ¶
401.3 Water-Conserving Fixtures and Fittings . . . . . . . . . . . . . . . . . . .59 402.0 Installation . . . . . . . . . . . . . . . . . . .59 402.1 Cleaning . . . . . . . . . . . . . . . . . . . . .59 402.2 Joints . . . . . . . . . . . . . . . . . . . . . . .59 402.3 Securing Fixtures . . . . . . . . . . . . . .59 402.4 Wall-Hung Fixtures . . . . . . . . . . . . .59 402.5 Setting . . . . . . . . . . . . . . . . . . . . . .59 402.6 Flanged Fixture Connections . . . . .59 402.7 Supply Fittings . . . . . . . . . . . . . . . .60 402.8 Installation . . . . . . . . . . . . . . . . . . .60 402.9…
422.8 Cosmetology . . . . . . . . . . . . . . . . .69 ¶
422.8 Cosmetology . . . . . . . . . . . . . . . . .69
422.9 Cosmetology Establishments . . . . .69 ¶
422.9 Cosmetology Establishments . . . . .69
422.10 Commissaries Serving Mobile ¶
422.10 Commissaries Serving Mobile Food Preparation Units . . . . . . . . .69
422.11 Employee Lavatories in ¶
422.11 Employee Lavatories in Food Establishments . . . . . . . . . . .69 Table 422.1 Minimum Plumbing Facilities . . . . .70 Table 4-1 Occupant Load Factor [BSC and DSA-SS] . . . . . . . . . . . .75 Table 4-2 Minimum Plumbing Facilities [OSHPD 1, 2, 3, 4 & 5] . . . . . . . . .76 CHAPTER 5 WATER HEATERS . . . . . . . . . . . .81 501.0 General . . . . . . . . . . . . . . . . . . . . . .83 501.1 Applicability . . . . . . . . . . . . . . . . . . .83 Table 501.1(1) Water Heaters . . . . . . . . . . . . . . . .83
501.2 California Energy Code ¶
501.2 California Energy Code Water Heating System Requirements . . . . . . . . . . . . . . . . .83 502.0 Permits . . . . . . . . . . . . . . . . . . . . . .83 502.1 General . . . . . . . . . . . . . . . . . . . . . .83 503.0 Inspection . . . . . . . . . . . . . . . . . . . .83 503.1 Inspection of Chimneys or Vents . . .83 503.2 Final Water Heater Inspection . . . .83 504.0 Water Heater Requirements . . . . . .83 504.1 Location . . . . . . . . . . . . . . . . . . . . .83 Table 501.1(2) First Hour Rating . . . . . . . . . . . . . .83 504.2 Vent . . . . . . . . . . . . . . . . . . . . . . . .84…
601.4 Schools of Cosmetology and ¶
601.4 Schools of Cosmetology and Cosmetological Establishments . .138
601.5 Meat and Poultry Processing ¶
601.5 Meat and Poultry Processing Plants . . . . . . . . . . . . . . . . . . . . . .138
601.6 Collection Centers and ¶
601.6 Collection Centers and Facilities . . . . . . . . . . . . . . . . . . . .139
601.7 Renderers . . . . . . . . . . . . . . . . . . .139 ¶
601.7 Renderers . . . . . . . . . . . . . . . . . . .139
601.8 Horse Meat and Pet Food ¶
601.8 Horse Meat and Pet Food Establishments . . . . . . . . . . . . . . .139 602.0 Unlawful Connections . . . . . . . . . .139 602.1 Prohibited Installation . . . . . . . . . .139 602.2 Cross-Contamination . . . . . . . . . .139 602.3 Backflow Prevention . . . . . . . . . . .139 xxxii 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. TABLE OF CONTENTS 602.4 Approval by Authority . . . . . . . . . .139 603.0 Cross-Connection Control . . . . . .139 603.1 General . . . . . . . . . . . . . . . . . .…
613.0 Domestic Hot-Water Distribution ¶
613.0 Domestic Hot-Water Distribution Systems for Health Facilities and Clinics . . . . . . . . . . . . . . . . . .161 Table 613.1 Hot Water Use . . . . . . . . . . . . . . . . .161
614.0 Dialysis Water-Distribution ¶
614.0 Dialysis Water-Distribution Systems . . . . . . . . . . . . . . . . . . . . . .162
615.0 Identification of Potable and ¶
615.0 Identification of Potable and Nonpotable Water Lines . . . . . . . . .162
615.1 Uses Not Permitted . . . . . . . . . . . . .162 ¶
615.1 Uses Not Permitted . . . . . . . . . . . . .162
616.0 Emergency Water Supply . . . . . . . .162 ¶
616.0 Emergency Water Supply . . . . . . . .162 CHAPTER 7 SANITARY DRAINAGE . . . . . . . .163 PART I Drainage Systems . . . . . . . . . . .165 701.0 General . . . . . . . . . . . . . . . . . . . . .165 701.1 Applicability . . . . . . . . . . . . . . . . . .165 701.2 Drainage Piping . . . . . . . . . . . . . .165 701.3 Drainage Fittings . . . . . . . . . . . . .165 701.4 Continuous Wastes . . . . . . . . . . .165 701.5 Lead . . . . . . . . . . . . . . . . . . . . . . .165 701.6 Caulking Ferrules . . . . . . . . . . . . .165 701.7 Soldering Bushings . . . . . . . . . . . .165 Table 701.6…
717.2 Meat and Poultry Processing ¶
717.2 Meat and Poultry Processing Plants . . . . . . . . . . . . . . . . . . . . . .176 718.0 Grade, Support, and Protection of Building Sewers . . .176 718.1 Slope . . . . . . . . . . . . . . . . . . . . . .176 ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. TABLE OF CONTENTS 718.2 Support . . . . . . . . . . . . . . . . . . . . .176 718.3 Protection from Damage . . . . . . .176 719.0 Cleanouts . . . . . . . . . . . . . . . . . . .177 719.1 Locations . . . . . . . . . . . . . . . . . . .177 719.2 No Additional Cleanouts . .…
724.0 Meat and Poultry Processing ¶
724.0 Meat and Poultry Processing Plant Drainage . . . . . . . . . . . . . . .178
725.0 Collection Center and ¶
725.0 Collection Center and Facilities Drainage . . . . . . . . . . . .178
726.0 Drainage and Plumbing, ¶
726.0 Drainage and Plumbing, General . . . . . . . . . . . . . . . . . . . . .178
727.0 Emergency Sanitary Drainage . . .178 ¶
727.0 Emergency Sanitary Drainage . . .178 CHAPTER 8 INDIRECT WASTES . . . . . . . . . .179 801.0 General . . . . . . . . . . . . . . . . . . . . .181 801.1 Applicability . . . . . . . . . . . . . . . . . .181 801.2 Air Gap or Air Break Required . . .181 801.3 Food and Beverage Handling Establishments . . . . . . .181 801.4 Bar and Fountain Sink Traps . . . .181 801.5 Connections from Water Distribution System . . . . . . . . . . . .181 801.6 Sterilizers . . . . . . . . . . . . . . . . . . .181 801.7 Drip or Drainage Outlets . . . . . . . .181 802.0 Approvals . . . . . . . . . . . . . . . . .…
1010.2 Meat and Poultry Processing ¶
1010.2 Meat and Poultry Processing Plants . . . . . . . . . . . . . . . . . . . . . .197
1010.3 Collection Centers and ¶
1010.3 Collection Centers and Facilities . . . . . . . . . . . . . . . . . . . .197
1010.4 Horse Meat and Pet Food ¶
1010.4 Horse Meat and Pet Food Establishments . . . . . . . . . . . . . . .197
1010.5 Draining and Plumbing . . . . . . . .197 ¶
1010.5 Draining and Plumbing . . . . . . . .197 1011.0 Minimum Requirements for Auto Wash Racks . . . . . . . . . . . . .197 1011.1 General . . . . . . . . . . . . . . . . . . . . .197 1012.0 Commercial and Industrial Laundries . . . . . . . . . . . . . . . . . . .197 1012.1 General . . . . . . . . . . . . . . . . . . . . .197 1013.0 Bottling Establishments . . . . . . . .197 1013.1 General . . . . . . . . . . . . . . . . . . . . .197 1014.0 Grease Interceptors . . . . . . . . . . .197 1014.1 General . . . . . . . . . . . . . . . . . . . . .197 1014.2 Hydromechanical Grease Interceptors . . .…
1211.8 Earthquake-Actuated Gas ¶
1211.8 Earthquake-Actuated Gas Shutoff Valves . . . . . . . . . . . . . . . .229 1212.0 Appliance and Equipment Connections to Building Piping . . .229 1212.1 Connecting Appliances and Equipment . . . . . . . . . . . . . . . . . .229 1212.2 Suspended Low-Intensity Infrared Tube Heaters . . . . . . . . .230 1212.3 Use of Nonmetallic Gas Hose Connectors . . . . . . . . . . . . .230 1212.4 Injection (Bunsen) Burners . . . . . .230 1212.5 Connection of Portable and Mobile Industrial Gas Appliances . . . . . . . . . . . . . .230 1212.6 Appliance Shutoff Valves and Connections . . . . . . . . . . .…
1501.9 Signage . . . . . . . . . . . . . . . . . . . .310 ¶
1501.9 Signage . . . . . . . . . . . . . . . . . . . .310 1501.10 System Controls . . . . . . . . . . . . . .310 1502.0 Inspection and Testing . . . . . . . . .310 1502.1 General . . . . . . . . . . . . . . . . . . . . .310 1502.2 Supply System Inspection and Test . . . . . . . . . . . . . . . . . . . .310 1502.3 Cross-Connection Inspection and Testing . . . . . . . . .310 1502.4 Separation Requirements . . . . . . .311 1502.5 Abandonment . . . . . . . . . . . . . . . .311 1502.6 Sizing . . . . . . . . . . . . . . . . . . . . . .312 1503.0 Gray Water Systems . . . . . . . . . .312 1503.1…
1504.5 Irrigation, Disposal Field and ¶
1504.5 Irrigation, Disposal Field and Mulch Basin Construction . . . . . .316 Table 1504.5.3 Subsoil Irrigation Field Construction . . . . . . . . . . . . . . . . .318 Table 1504.5.5 Subsurface Irrigation Design Criteria for Six Typical Soils . . . . .318
1504.6 Reserved . . . . . . . . . . . . . . . . . . .318 ¶
1504.6 Reserved . . . . . . . . . . . . . . . . . . .318
1504.7 Reserved . . . . . . . . . . . . . . . . . . .318 ¶
1504.7 Reserved . . . . . . . . . . . . . . . . . . .318 1504.8 Gray Water System Color and Marking Information . . . . . . . .318 1504.9 Other Collection and Distribution Systems . . . . . . . . . . .318 1504.10 Testing . . . . . . . . . . . . . . . . . . . . .318 1504.11 Maintenance . . . . . . . . . . . . . . . . .318 1505.0 Recycled Water Supply Systems in Buildings . . . . . . . . . .318 1505.1 General . . . . . . . . . . . . . . . . . . . . .318 1505.2 Permit . . . . . . . . . . . . . . . . . . . . . .319 1505.3 System Changes . . . . . . . . . . . . .319 xliv 2025 CALIFORNIA PLUMBING…
1505.15 Minimum Water Quality ¶
1505.15 Minimum Water Quality Requirements for Reclaimed (Recycled) Water . . . . . . . . . . . . .322
1505.16 Maintenance and Inspection . . . .322 ¶
1505.16 Maintenance and Inspection . . . .322 Table 1505.16 Minimum Reclaimed (Recycled) Water Source Testing, Inspection, and Maintenance Frequency . . . . . . .322 1506.0 On-Site Treated Nonpotable Gray Water Systems . . . . . . . . . .322 1506.1 General . . . . . . . . . . . . . . . . . . . . .322 1506.2 Plumbing Plan Submission . . . . . .322 1506.3 System Changes . . . . . . . . . . . . .322 1506.4 Connections to Potable or Recycled Water Supply Systems . . . . . . . . . . . . . . . . . . . .322 1506.5 Water Pressure . . . . . . . . . . . . . . .322 1506.6 Initial Cross-Connection Test .…
1954.202 and 5551; and Government Code Sections ¶
1954.202 and 5551; and Government Code Sections 8698.4, 12955.1 and 12955.1.1. California Code of Regulations, Title 20, Sections 1605.1, 1605.3 and 1607. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DIVISION I CALIFORNIA ADMINISTRATION 1.8.2.1.2 Housing Accessibility. Application – Covered multifamily dwellings as defined in Chapter 2 of the California Code of Reg- ulations, Title 24, Part 2, also known as the Cali- fornia Building Code including but not limited to lodging houses, dormitories, timeshares, condo- miniums,…
101.0 General. ¶
101.1 Title. This document shall be known as the “Uniform ¶
101.1 Title. This document shall be known as the “Uniform Plumbing Code,’’ may be cited as such, and will be referred to herein as “this code.”
101.2 Scope. The provisions of this code shall apply to the ¶
101.2 Scope. The provisions of this code shall apply to the erection, installation, alteration, repair, relocation, replacement, addition to, use, or maintenance of plumbing systems within this jurisdiction.
101.3 Purpose. ¶
101.3 Purpose. This code is an ordinance providing minimum requirements and standards for the protection of the public health, safety, and welfare.
101.4 Unconstitutional. ¶
101.4 Unconstitutional. Where a section, subsection, sentence, clause, or phrase of this code is, for a reason, held to be unconstitutional, such decision shall not affect the validity of the remaining portions of this code. The legislative body hereby declares that it would have passed this code, and each section, subsection, sentence, clause, or phrase thereof, irrespective of the fact that one or more sections, subsections, sentences, clauses, and phrases are declared unconstitutional.
101.5 Validity. ¶
101.5 Validity. Where a provision of this code, or the application thereof to a person or circumstance, is held invalid, the remainder of the code, or the application of such provision to other persons or circumstances, shall not be affected thereby.
102.0 Applicability. ¶
102.1 Conflicts Between Codes. Where the requirements ¶
102.1 Conflicts Between Codes. Where the requirements within the jurisdiction of this plumbing code conflict with the requirements of the mechanical code, this code shall prevail. In instances where this code, applicable standards, or the manufacturer’s installation instructions conflict, the more stringent provisions shall prevail. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall prevail.
102.2 Existing Installations. Plumbing systems lawfully ¶
102.2 Existing Installations. Plumbing systems lawfully in existence at the time of the adoption of this code shall be permitted to have their use, maintenance, or repair continued where the use, maintenance, or repair is in accordance with the original design and location and no hazard to life, health, or property has been created by such plumbing system.
102.3 Maintenance. The plumbing and drainage system, ¶
102.3 Maintenance. The plumbing and drainage system, both existing and new, of a premise under the Authority Having Jurisdiction shall be maintained in a sanitary and safe operating condition. Devices or safeguards required by this code shall be maintained in accordance with the code edition under which installed. The owner or the owner’s designated agent shall be responsible for maintenance of plumbing systems. To determine compliance with this subsection, the Authority Having Jurisdiction shall be permitted to cause a plumbing system to be reinspected.
102.4 Additions, Alterations, Renovations, or Repairs. ¶
102.4 Additions, Alterations, Renovations, or Repairs. Additions, alterations, renovations or repairs shall conform to that required for a new system without requiring the existing plumbing system to be in accordance with the requirements of this code. Additions, alterations, renovations, or repairs shall not cause an existing system to become unsafe, insanitary, or overloaded. Additions, alterations, renovations, or repairs to existing plumbing installations shall comply with the provisions for new construction unless such deviations are found to be necessary and are first approved by the…
102.5 Health and Safety. ¶
102.5 Health and Safety. Where compliance with the provisions of this code fails to eliminate or alleviate a nuisance, or other dangerous or insanitary condition that involves health or safety hazards, the owner or the owner’s agent shall install such additional plumbing and drainage facilities or shall make such repairs or alterations as ordered by the Authority Having Jurisdiction.
102.6 Changes in Building Occupancy. ¶
102.6 Changes in Building Occupancy. Plumbing systems that are a part of a building or structure undergoing a change in use or occupancy, as defined in the building code, shall be in accordance with the requirements of this code that are applicable to the new use or occupancy.
102.7 Moved Structures. Parts of the plumbing system of ¶
102.7 Moved Structures. Parts of the plumbing system of a building or part thereof that is moved from one foundation to another, or from one location to another, shall be in accordance with the provisions of this code for new installations and completely tested as prescribed elsewhere in this section for new work, except that walls or floors need not be removed during such test where other equivalent means of inspection acceptable to the Authority Having Jurisdiction are provided.
102.8 Appendices. The provisions in the appendices are ¶
102.8 Appendices. The provisions in the appendices are intended to supplement the requirements of this code and shall not be considered part of this code unless formally adopted as such. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DIVISION II SCOPE AND ADMINISTRATION
103.0 Duties and Powers of the Authority Having ¶
103.0 Duties and Powers of the Authority Having Jurisdiction.
103.1 General. The Authority Having Jurisdiction shall be ¶
103.1 General. The Authority Having Jurisdiction shall be the Authority duly appointed to enforce this code. For such purposes, the Authority Having Jurisdiction shall have the powers of a law enforcement officer. The Authority Having Jurisdiction shall have the power to render interpretations of this code and to adopt and enforce rules and regulations supplemental to this code as deemed necessary in order to clarify the application of the provisions of this code. Such interpretations, rules, and regulations shall comply with the intent and purpose of this code. In accordance with the…
103.2 Liability. The Authority Having Jurisdiction charged ¶
103.2 Liability. The Authority Having Jurisdiction charged with the enforcement of this code, acting in good faith and without malice in the discharge of the Authority Having Jurisdiction’s duties, shall not thereby be rendered personally liable for damage that accrues to persons or property as a result of an act or by reason of an act or omission in the discharge of duties. A suit brought against the Authority Having Jurisdiction or employee because of such act or omission performed in the enforcement of provisions of this code shall be defended by legal counsel provided by this jurisdiction…
103.3 Applications and Permits. The Authority Having ¶
103.3 Applications and Permits. The Authority Having Jurisdiction shall be permitted to require the submission of plans, specifications, drawings, and such other information in accordance with the Authority Having Jurisdiction, prior to the commencement of, and at a time during the progress of, work regulated by this code. The issuance of a permit upon construction documents shall not prevent the Authority Having Jurisdiction from thereafter requiring the correction of errors in said construction documents or from preventing construction operations being carried on thereunder where in…
103.4 Right of Entry. Where it is necessary to make an ¶
103.4 Right of Entry. Where it is necessary to make an inspection to enforce the provisions of this code, or where the Authority Having Jurisdiction has reasonable cause to believe that there exists in a building or upon premises a condition or violation of this code that makes the building or premises unsafe, insanitary, dangerous, or hazardous, the Authority Having Jurisdiction shall be permitted to enter the building or premises at reasonable times to inspect or to perform the duties imposed by the Authority Having Jurisdiction by this code, provided that where such building or premises is…
104.0 Permits. ¶
104.1 Permits Required. It shall be unlawful for a person, ¶
104.1 Permits Required. It shall be unlawful for a person, firm, or corporation to make an installation, alteration, repair, replacement, or remodel a plumbing system regulated by this code except as permitted in Section 104.2, or to cause the same to be done without first obtaining a separate plumbing permit for each separate building or structure.
104.2 Exempt Work. A permit shall not be required for the ¶
104.2 Exempt Work. A permit shall not be required for the following: (1) The stopping of leaks in drains, soil, waste, or vent pipe, provided, however, that a trap, drainpipe, soil, waste, or vent pipe become defective, and it becomes necessary to remove and replace the same with new material, the same shall be considered as new work and a permit shall be procured and inspection made as provided in this code. (2) The clearing of stoppages, including the removal and reinstallation of water closets, or the repairing of leaks in pipes, valves, or fixtures, provided such repairs do not involve or…
104.3 Application for Permit. To obtain a permit, the ¶
104.3 Application for Permit. To obtain a permit, the applicant shall first file an application therefore in writing on a form furnished by the Authority Having Jurisdiction for that purpose. Such application shall: (1) Identify and describe the work to be covered by the permit for which application is made. (2) Describe the land upon which the proposed work is to be done by legal description, street address, or similar description that will readily identify and locate the proposed building or work. (3) Indicate the use or occupancy for which the proposed work is intended. 22 2025 CALIFORNIA…
104.4 Permit Issuance. ¶
104.4 Permit Issuance. The application, construction documents, and other data filed by an applicant for a permit shall be reviewed by the Authority Having Jurisdiction. Such plans shall be permitted to be reviewed by other departments of this jurisdiction to verify compliance with applicable laws under their jurisdiction. Where the Authority Having Jurisdiction finds that the work described in an application for permit and the plans, specifications, and other data filed therewith are in accordance with the requirements of the code and other pertinent laws and ordinances and that the fees…
104.5 Fees. Fees shall be assessed in accordance with the ¶
104.5 Fees. Fees shall be assessed in accordance with the provisions of this section and as set forth in the fee schedule, Table 104.5. The fees are to be determined and adopted by this jurisdiction. 104.5.1 Work Commencing Before Permit Issuance. Where work for which a permit is required by this code has been commenced without first obtaining said permit, a special investigation shall be made before a permit is issued for such work. 104.5.2 Investigation Fees. An investigation fee, in addition to the permit fee, shall be collected whether a permit is then or subsequently issued. The…
105.0 Inspections and Testing. ¶
105.1 General. Plumbing systems for which a permit is ¶
105.1 General. Plumbing systems for which a permit is required by this code shall be inspected by the Authority Having Jurisdiction. No plumbing system or portion thereof shall be covered, concealed, or put into use until inspected and approved as prescribed in this code. Neither the Authority Having Jurisdiction nor the jurisdiction shall be liable for expense entailed in the removal or replacement of material required to permit inspection. Plumbing systems regulated by this code shall not be connected to the water, the energy fuel supply, or the sewer system until authorized by the…
105.2 Required Inspections. New plumbing work and ¶
105.2 Required Inspections. New plumbing work and such portions of existing systems as affected by new work, or changes, shall be inspected by the Authority Having Jurisdiction to ensure compliance with the requirements of this code and to ensure that the installation and construction of the plumbing system are in accordance with approved plans. The Authority Having Jurisdiction shall make the following inspections and other such inspections as necessary. The permittee or the permittee’s authorized agent shall be responsible for the scheduling of such inspections as follows: (1) The…
105.3 Testing of Systems. Plumbing systems shall be ¶
105.3 Testing of Systems. Plumbing systems shall be tested and approved in accordance with this code or the Authority Having Jurisdiction. Tests shall be conducted in the presence of the Authority Having Jurisdiction or the Authority Having Jurisdiction’s duly appointed representative. No test or inspection shall be required where a plumbing system, or part thereof, is set up for exhibition purposes and has no connection with a water or drainage system. In cases where it would be impractical to provide the required water or air tests, or for minor installations and repairs, the Authority…
105.4 Connection to Service Utilities. No person shall ¶
105.4 Connection to Service Utilities. No person shall make connections from a source of energy or fuel to a plumbing system or equipment regulated by this code and for which a permit is required until approved by the Authority Having Jurisdiction. No person shall make connection from a watersupply line nor shall connect to a sewer system regulated by this code and for which a permit is required until approved by the Authority Having Jurisdiction. The Authority Having Jurisdiction shall be permitted to authorize temporary connection of the plumbing equipment to the source of energy or fuel…
106.0 Violations and Penalties. ¶
106.1 General. It shall be unlawful for a person, firm, or ¶
106.1 General. It shall be unlawful for a person, firm, or corporation to erect, construct, enlarge, alter, repair, move, improve, remove, convert, demolish, equip, use, or maintain plumbing or permit the same to be done in violation of this code.
106.2 Notices of Correction or Violation. Notices of ¶
106.2 Notices of Correction or Violation. Notices of correction or violation shall be written by the Authority Having Jurisdiction and shall be permitted to be posted at the site of the work or mailed or delivered to the permittee or their authorized representative. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DIVISION II SCOPE AND ADMINISTRATION Refusal, failure, or neglect to comply with such notice or order within 10 days of receipt thereof, shall be considered a violation of this code and shall be subject to the…
106.3 Penalties. A person, firm, or corporation violating a ¶
106.3 Penalties. A person, firm, or corporation violating a provision of this code shall be deemed guilty of a misdemeanor, and upon conviction thereof, shall be punishable by a fine, imprisonment, or both set forth by the governing laws of the jurisdiction. Each separate day or portion thereof, during which a violation of this code occurs or continues, shall be deemed to constitute a separate offense.
106.4 Stop Orders. Where work is being done contrary to ¶
106.4 Stop Orders. Where work is being done contrary to the provisions of this code, the Authority Having Jurisdiction shall be permitted to order the work stopped by notice in writing served on persons engaged in the doing or causing such work to be done, and such persons shall forthwith stop work until authorized by the Authority Having Jurisdiction to proceed with the work.
106.5 Authority to Disconnect Utilities in Emergen- ¶
106.5 Authority to Disconnect Utilities in Emergen- cies. The Authority Having Jurisdiction shall have the authority to disconnect a plumbing system to a building, structure, or equipment regulated by this code in case of emergency where necessary to eliminate an immediate hazard to life or property.
106.6 Authority to Condemn. ¶
106.6 Authority to Condemn. Where the Authority Having Jurisdiction ascertains that a plumbing system or portion thereof, regulated by this code, has become hazardous to life, health, or property, or has become insanitary, the Authority Having Jurisdiction shall order in writing that such plumbing either be removed or placed in a safe or sanitary condition. The order shall fix a reasonable time limit for compliance. No person shall use or maintain defective plumbing after receiving such notice. Where such plumbing system is to be disconnected, written notice shall be given. In cases of…
107.0 Board of Appeals. ¶
107.1 General. In order to hear and decide appeals of orders, ¶
107.1 General. In order to hear and decide appeals of orders, decisions, or determinations made by the Authority Having Jurisdiction relative to the application and interpretations of this code, there shall be and is hereby created a Board of Appeals consisting of members who are qualified by experience and training to pass upon matters pertaining to plumbing design, construction, and maintenance and the public health aspects of plumbing systems and who are not employees of the jurisdiction. The Authority Having Jurisdiction shall be an ex-officio member and shall act as secretary to said…
107.2 Limitations of Authority. The Board of Appeals ¶
107.2 Limitations of Authority. The Board of Appeals shall have no authority relative to interpretation of the administrative provisions of this code, nor shall the board be empowered to waive requirements of this code. 26 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DIVISION II SCOPE AND ADMINISTRATION TABLE 104.5 PLUMBING PERMIT FEES Permit Issuance 1. For issuing each permit…
201.0 General. ¶
201.1 Applicability. ¶
201.1 Applicability. For the purpose of this code, the following terms have the meanings indicated in this chapter. No attempt is made to define ordinary words, which are used in accordance with their established dictionary meanings, except where a word has been used loosely, and it is necessary to define its meaning as used in this code to avoid misunderstanding.
202.0 Definition of Terms. ¶
202.1 General. ¶
202.1 General. The definitions of terms are arranged alphabetically according to the first word of the term.
203.0 – A – ¶
203.0 – A – ABS. Acrylonitrile-butadiene-styrene. Accepted Engineering Practice. That which conforms to technical or scientific-based principles, tests, or standards that are accepted by the engineering profession. Accessible. Where applied to a fixture, connection, appliance, or equipment, “accessible” means having access thereto, but which first may require the removal of an access panel, door, or similar obstruction. Accessible, Readily. Having a direct access without the necessity of removing a panel, door, or similar obstruction. Accessory Dwelling Unit. [HCD 1 & HCD 2] An attached or…
204.0 – B – ¶
204.0 – B – Backflow. The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from sources other than its intended source. See Backpressure Backflow and Backsiphonage. Backflow Connection. An arrangement whereby backflow can occur. Backflow Preventer. A backflow prevention device, an assembly, or another method to prevent backflow into the potable water system. Backpressure Backflow. Backflow due to an increased pressure above the supply pressure, which may be due to pumps, boilers, gravity, or other sources of pressure.…
205.0 – C – ¶
205.0 – C – Category 1. Activities, systems, or equipment whose failure is likely to cause major injury or death to patients, staff, or visitors. [NFPA 99:3.3.162.1] Category 2. Activities, systems, or equipment whose failure is likely to cause minor injury to patients, staff, or visitors. [NFPA 99:3.3.162.2] Category 3. Activities, systems, or equipment whose failure is not likely to cause injury to patients, staff, or visitors, but can cause discomfort. [NFPA 99:3.3.162.3] Category 3 Vacuum System. A Category 3 vacuum distribution system that can be either a wet system designed to remove…
206.0 – D – ¶
206.0 – D – Dead Leg. A section of potable water pipe which contains water that has no flow or does not circulate. Debris Excluder. A device installed on the rainwater catchment conveyance system to prevent the accumulation of leaves, needles, or other debris in the system. Department. [HCD 1, HCD 2 & HCD 1-AC] “Depart- ment” means the Department of Housing and Community Development. Department Having Jurisdiction. The Authority Having Jurisdiction, including any other law enforcement agency affected by a provision of this code, whether such agency is specifically named or not. [HCD 1 & HCD…
207.0 – E – ¶
207.0 – E – Effective Ground-Fault Current Path. An intentionally constructed, low impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors. [NFPA 70:100] Effective Opening. The minimum cross-sectional area at the point of water supply discharge measured or expressed in terms of (1) diameter of a circle or (2) where the opening is not circular, the diameter of a…
208.0 – F – ¶
208.0 – F – F Rating. The time period that the penetration firestop system limits the spread of fire through the penetration, where tested in accordance with ASTM E814 or UL 1479. Fixture Branch. A water supply pipe between the fixture supply pipe and the water distribution pipe. Fixture Drain. The drain from the trap of a fixture to the junction of that drain with any other drainpipe. Fixture Fitting. A device that controls and guides the flow of water. Fixture Supply. A water supply pipe is connecting the fixture with the fixture branch. Fixture Unit. A quantity in terms of which the…
209.0 – G – ¶
209.0 – G – Gang or Group Shower. Two or more showers in a com mon area. Gas Piping. An installation of pipe, valves, or fittings that are used to convey fuel gas, installed on a premise or in a building. Gas Piping System. An arrangement of gas piping or regulators after the point of delivery and each arrangement of gas piping serving a building, structure, or premises, whether individually metered or not. General Anesthesia and Levels of Sedation/Analge- sia. Deep Sedation/Analgesia. A drug-induced depression of consciousness during which patients cannot be easily aroused but respond…
210.0 – H – ¶
210.0 – H – Handwashing Fixture. [OSHPD 1, 2, 3, 4, 5 & 6] Hand- washing fixtures consist of faucet, trim and lavatory as described: 36 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DEFINITIONS (1) Faucets and Trim a. Handwashing fixtures used by medical and nursing staff, patients, and food handlers shall have fittings such that all controls can be operated without the use of hands. i. Wrist or elbow blades shall be permitted unless otherwise noted in Table 4-2. ii. Blade handles used for…
211.0 – I – ¶
211.0 – I – Indirect-Fired Water Heater. A water heater consisting of a storage tank equipped with an internal or external heat exchanger used to transfer heat from an external source to heat potable water. The storage tank either contains heated potable water or water supplied from an external source, such as a boiler. Indirect Waste Pipe. A pipe that does not connect directly to the drainage system but conveys liquid wastes by discharging into a plumbing fixture, interceptor, or receptacle that is directly connected to the drainage system. Individual Vent. A pipe installed to vent a fixture…
212.0 – J – ¶
212.0 – J – Joint, Brazed. A joint obtained by joining of metal parts with alloys that melt at temperatures exceeding 840°F (449°C), but less than the melting temperature of the parts to be joined. Joint, Compression. A multipiece joint with cup-shaped threaded nuts that, when tightened, compress tapered sleeves so that they form a tight joint on the periphery of the tubing they connect. Joint, Flanged. One made by bolting together a pair of flanged ends. Joint, Flared. A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut…
213.0 – K – ¶
214.0 – L – ¶
214.0 – L – Labeled. Equipment or materials bearing a label of a listing agency (accredited conformity assessment body). See Listed (third-party certified). [HCD 1 & HCD 2] “Labeled” means equipment or materi- als to which has been attached a label, symbol or other iden- tifying mark of an organization, approved by the Department, 38 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DEFINITIONS Lot. A single or individual parcel or area of land legally recorded or validated by other means…
215.0 – M – ¶
215.0 – M – Macerating Toilet System. A system comprised of a sump with macerating pump and with connections for a water closet and other plumbing fixtures, which is designed to accept, grind and pump wastes to an approved point of discharge. Main. The principal artery of a system of continuous piping to which branches may be connected. Main Sewer. See Public Sewer. Main Vent. The principal artery of the venting system to which vent branches may be connected. May. A permissive term. Medical Air. For purposes of this code, medical air is air supplied from cylinders, bulk containers, or medical…
216.0 – N – ¶
216.0 – N – Nitrogen NF. Nitrogen complying as a minimum with nitrogen NF. [NFPA 99:3.3.119.1] Nonwater Supplied Urinal. [HCD 1] A plumbing fixture which does not require water supply and is designed to receive and convey the uninhibited flow of liquid waste to the gravity drainage system. Nonwater Urinal with Drain Cleansing Action. A nonwater urinal that conveys waste into the drainage system without the use of water for flushing and automatically performs a drain-cleansing action after a predetermined amount of time. Nuisance. Includes, but is not limited to: (1) A public nuisance known at…
217.0 – O – ¶
217.0 – O – Offset. A combination of elbows or bends in a line of piping that brings one section of the pipe out of line but into a line parallel with the other section. Oil Interceptor. See Interceptor (Clarifier). On-Site Treated Nonpotable Water. [BSC-CG & HCD 1] Nonpotable water that has been collected, treated, and intended to be used on-site and is suitable for direct benefi- cial use. Sources for on-site treated nonpotable water include, but are not limited to, gray water; rainwater; stormwater; reclaimed (recycled) water; cooling tower blow-down water; and foundation drainage.
218.0 – P – ¶
218.0 – P – Patient Care Space. Any space of a health care facility wherein patients are intended to be examined or treated. [NFPA 99:3.3.140] Category 1 Space. Space in which failure of equipment or a system is likely to cause major injury or death of patients, staff, or visitors. [NFPA 99:3.3.140.1] Category 2 Space. Space in which failure of equipment or a system is likely to cause minor injury to patients, staff, or visitors. [NFPA 99:3.3.140.2] Category 3 Space. Space in which the failure of equipment or a system is not likely to cause injury to patients, staff, or visitors but can cause…
219.0 – Q – ¶
219.0 – Q – Quick-Disconnect Device. A hand-operated device that provides a means for connecting and disconnecting a hose to a water supply, and that is equipped with a means to shut off the water supply when the device is disconnected. Quick-Disconnect Device, Fuel Gas. A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and that is equipped with an automatic means to shut off the gas supply when the device is disconnected. [NFPA 54:3.3.27.3]
220.0 – R – ¶
220.0 – R – Rainwater. [BSC-CG & HCD 1] Precipitation on any pub- lic or private parcel that has not entered an offsite storm drain system or channel, a flood control channel, or any other stream channel, and has not previously been put to beneficial use. Rainwater Catchment System. [BSC-CG & HCD 1] A facility designed to capture, retain, and store rainwater flow- ing off a building, parking lot, or any other manmade imper- vious surface for subsequent onsite use. Rainwater catchment system is also known as “Rainwater Harvesting System” or “Rainwater Capture System.” Rainwater Storage Tank.…
221.0 – S – ¶
221.0 – S – Sand Interceptor. See Interceptor (Clarifier). Scavenging. Evacuation of exhaled mixtures of oxygen and nitrous oxide. [NFPA 99:3.3.163] Scrub Sink. [OSHPD 1, 2, 3, 4 & 5] Is a sink used to wash and scrub the hands and arms during the septic preparation for surgery and equipped with a supply spout as required for a handwashing fixture. The scrub sink shall be trimmed with foot, knee or electronic sensor controls that do not involve contact with the upper extremities. Sensor operated fixtures shall be capable of functioning during loss of normal power. Single-lever wrist blades…
222.0 – T – ¶
222.0 – T – T Rating. The time period that the penetration firestop system, including the penetrating item, limits the maximum temperature rise of 325°F (181°C) above its initial temperature through the penetration on the nonfire side, where tested in accordance with ASTM E814 or UL 1479. Tailpiece. The pipe or tubing that connects the outlet of a plumbing fixture to a trap. Testing Agency. [HCD 1] See “Approved Testing Agency”. Thermostatic (Temperature Control) Valve. A mixing valve that senses outlet temperature and compensates for fluctuations in incoming hot or cold water temperatures.…
223.0 – U – ¶
223.0 – U – UPC. [HCD 1] “UPC” is the latest edition of the Uniform Plumbing Code, published by the International Association of Plumbing and Mechanical Officials. Unsanitary. See Insanitary. User Outlet. See Station Outlet. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. DEFINITIONS
224.0 – V – ¶
224.0 – V – Vacuum. A pressure less than that exerted by the atmosphere. Vacuum Breaker. See Backflow Preventer. Vacuum Relief Valve. A device that prevents excessive vacuum in a pressure vessel. Vacuum System-Level 1. A system consisting of central vacuum-producing equipment with pressure and operating controls, shutoff valves, alarm warning systems, gauges, and a network of piping extending to and terminating with suitable station inlets at locations where patient suction could be required. Valve, Balancing. A valve that regulates and controls the return of water to the water heater in a…
225.0 – W – ¶
225.0 – W – Wall-Hung Water Closet. A water closet installed in such a way that no part of the water closet touches the floor. Waste. See Liquid Waste and Industrial Waste. Waste Pipe. A pipe that conveys only liquid waste, free of fecal matter. Water Closet. [HCD 1] “Water Closet” is a plumbing fix- ture (which may be used for both solids and liquids) in which the waste matter is removed by flushing with water. Water-Conditioning or Treating Device. A device that conditions or treats a water supply to change its chemical content or remove suspended solids by filtration. Water Distribution…
226.0 – X – ¶
227.0 – Y – ¶
227.0 – Y – Yoke Vent. A pipe connecting upward from soil or waste stack to a vent stack to prevent pressure changes in the stacks.
228.0 – Z – ¶
228.0 – Z – No definitions. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. 46 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE CHAPTER 3 - GENERAL REGULATIONS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.) Adopting Agency<brAdopt Entire Chapter<brAdopt Entire Chapter…
301.0 General. ¶
301.1 Applicability. This chapter shall govern the general ¶
301.1 Applicability. This chapter shall govern the general requirements, not specific to other chapters, for the installation of plumbing systems.
301.2 Minimum Standards. ¶
301.2 Minimum Standards. Pipe, pipe fittings, traps, fixtures, material, and devices used in a plumbing system shall be listed (third-party certified) by a listing agency (accredited conformity assessment body) as complying with the approved applicable recognized standards referenced in this code, and shall be free from defects. Unless otherwise provided for in this code, materials, fixtures, or devices used or entering into the construction of plumbing systems, or parts thereof shall be submitted to the Authority Having Jurisdiction for approval prior to being installed. 301.2.1 Marking.…
301.3 Alternate Materials and Methods of Construction ¶
301.3 Alternate Materials and Methods of Construction Equivalency. Nothing in this code is intended to prevent the use of systems, methods, or devices of equivalent or superior quality, strength, fire resistance, effectiveness, durability, and safety over those prescribed by this code. Technical documentation shall be submitted to the Authority Having Jurisdiction to demonstrate equivalency prior to installation. The Authority Having Jurisdiction shall have the authority to approve or disapprove the system, method, or device for the intended purpose. [HCD 1] (See Section 1.8.7) However, the…
301.4 Flood Hazard Areas. Plumbing systems shall be ¶
301.4 Flood Hazard Areas. Plumbing systems shall be located above the elevation in accordance with the building code for utilities and attendant equipment or the elevation of the lowest floor, whichever is higher. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. GENERAL REGULATIONS Exception: Plumbing systems shall be permitted to be located below the elevation in accordance with the building code for utilities and attendant equipment or the elevation of the lowest floor, whichever is higher, provided that the systems are…
301.5 Alternative Engineered Design. An alternative ¶
301.5 Alternative Engineered Design. An alternative engineered design shall comply with the intent of the provisions of this code and shall provide an equivalent level of quality, strength, effectiveness, fire resistance, durability, and safety. Material, equipment, or components shall be designed and installed in accordance with the manufacturer’s installa tion instructions. 301.5.1 Permit Application. The registered design professional shall indicate on the design documents that the plumbing system, or parts thereof, is an alternative engineered design so that it is noted on the…
301.6 Tall Wood (Mass Timber) Buildings. Plumbing ¶
301.6 Tall Wood (Mass Timber) Buildings. Plumbing systems installed in tall wood (mass timber) buildings, shall comply with the following: (1) Be designed by a licensed plumbing contractor or a registered design professional in accordance with this code and the building code. (2) Be designed to accommodate expansion, contraction, and differential movement between parts of a tall wood (mass timber) building in accordance with Section 312.2.
301.7 One- and Two-Family Dwellings. [HCD 1] The ¶
301.7 One- and Two-Family Dwellings. [HCD 1] The provisions contained in this code shall not apply to one- and two-family dwelling private sewage disposal systems and minimum plumbing facilities when alternate facilities or installations have been approved by the local health author- ity, provided that such alternative facilities or installations provide substantially equivalent or greater protection to health and safety.
301.8 OSHPD 1R. [OSHPD 1R] For OSHPD 1R, refer to ¶
301.8 OSHPD 1R. [OSHPD 1R] For OSHPD 1R, refer to Section 309 of the California Existing Building Code for gen- eral requirements.
302.0 Iron Pipe Size (IPS) Pipe. ¶
302.1 General. Iron, steel, copper, and copper alloy pipe ¶
302.1 General. Iron, steel, copper, and copper alloy pipe shall be standard-weight iron pipe size (IPS) pipe.
303.0 Disposal of Liquid Waste. ¶
303.1 General. It shall be unlawful for a person to cause, ¶
303.1 General. It shall be unlawful for a person to cause, suffer, or permit the disposal of sewage, human excrement, or other liquid wastes, in a place or manner, except through and by means of an approved drainage system, installed and maintained in accordance with the provisions of this code. Exception: [HCD 1] Limited-density owner-built rural dwellings. A water closet shall not be required when an alter- nate system is provided and has been approved by the local health official. Where an alternative to the water closet is installed, a system for the disposal or treatment of graywater…
304.0 Connections to Plumbing System Required. ¶
304.0 Connections to Plumbing System Required.
304.1 General. Plumbing fixtures, drains, appurtenances, ¶
304.1 General. Plumbing fixtures, drains, appurtenances, and appliances, used to receive or discharge liquid wastes or sewage, shall be connected properly to the drainage system of the building or premises, in accordance with the requirements of this code. Exception: [HCD 1] Limited-density owner-built rural dwellings. Where conventional plumbing, in all or in part, is 50 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. GENERAL REGULATIONS installed within the structure, it shall be installed in…
305.0 Damage to Drainage System or Public Sewer. ¶
305.0 Damage to Drainage System or Public Sewer.
305.1 Unlawful Practices. ¶
305.1 Unlawful Practices. It shall be unlawful for a person to deposit, by any means whatsoever, into a plumbing fixture, floor drain, interceptor, sump, receptor, or device, which is connected to a drainage system, public sewer, private sewer, septic tank, or cesspool, any ashes; cinders; solids; rags; inflammable, poisonous, or explosive liquids or gases; oils; grease; or any other thing whatsoever that is capable of causing damage to the drainage system or public sewer.
306.0 Industrial Wastes. ¶
306.1 Detrimental Wastes. ¶
306.1 Detrimental Wastes. Wastes detrimental to the public sewer system or detrimental to the functioning of the sewage treatment plant shall be treated and disposed of as found necessary and directed by the Authority Having Jurisdiction.
306.2 Safe Discharge. Sewage or other waste from a ¶
306.2 Safe Discharge. Sewage or other waste from a plumbing system that is capable of being deleterious to surface or subsurface waters shall not be discharged into the ground or a waterway unless it has first been rendered safe by some acceptable form of treatment in accordance with the Authority Having Jurisdiction.
307.0 Location. ¶
307.1 System. Except as otherwise provided in this code, ¶
307.1 System. Except as otherwise provided in this code, no plumbing system, drainage system, building sewer, private sewage disposal system, or parts thereof shall be located in a lot other than the lot that is the site of the building, structure, or premises served by such facilities.
307.2 Ownership. ¶
307.2 Ownership. No subdivision, sale, or transfer of ownership of existing property shall be made in such manner that the area, clearance, and access requirements of this code are decreased.
308.0 Prohibited Locations. ¶
308.1 General. Piping, fixtures, appliances, or equipment ¶
308.1 General. Piping, fixtures, appliances, or equipment shall not be so located as to interfere with the normal use thereof or with the normal operation and use of windows, doors, or other required facilities.
309.0 Workmanship. ¶
309.1 Engineering Practices. Design, construction, and ¶
309.1 Engineering Practices. Design, construction, and workmanship shall be in accordance with accepted engineering practices and shall be of such character as to secure the results sought to be obtained by this code.
309.2 Concealing Imperfections. It is unlawful to conceal ¶
309.2 Concealing Imperfections. It is unlawful to conceal cracks, holes, or other imperfections in materials by welding, brazing, or soldering or by using therein or thereon paint, wax, tar, solvent cement, or other leak-sealing or repair agent.
309.3 Burred Ends. Burred ends of pipe and tubing shall ¶
309.3 Burred Ends. Burred ends of pipe and tubing shall be reamed to the full bore of the pipe or tube, and chips shall be removed.
309.4 Installation Practices. Plumbing systems shall be ¶
309.4 Installation Practices. Plumbing systems shall be installed in a workmanlike manner which is in accordance with this code, applicable standards, and the manufacturer’s installation instructions. All materials shall be installed so as not to adversely affect the systems and equipment or the structure of the building, and in compliance with all laws and other provisions of this code. All plumbing systems shall be in accordance with construction documents approved by the Authority Having Jurisdiction.
309.5 Sound Transmission. Plumbing piping systems ¶
309.5 Sound Transmission. Plumbing piping systems shall be designed and installed in conformance with sound limitations as required in the California Building Code .
309.6 Dead Legs. Dead legs shall have a method of flushing. ¶
309.6 Dead Legs. Dead legs shall have a method of flushing.
310.0 Prohibited Fittings and Practices. ¶
310.0 Prohibited Fittings and Practices.
310.1 Fittings. No double hub fitting, single or double tee ¶
310.1 Fittings. No double hub fitting, single or double tee branch, single or double tapped tee branch, side inlet quarter bend, running thread, band, or saddle shall be used as a drainage fitting.
310.2 Drainage and Vent Piping. No drainage or vent ¶
310.2 Drainage and Vent Piping. No drainage or vent piping shall be drilled and tapped for the purpose of making connections thereto, and no cast-iron soil pipe shall be threaded.
310.3 Waste Connection. No waste connection shall be ¶
310.3 Waste Connection. No waste connection shall be made to a closet bend or stub of a water closet or similar fix ture.
310.4 Use of Vent and Waste Pipes. ¶
310.4 Use of Vent and Waste Pipes. Except as hereinafter provided in Section 908.0 through Section 911.0, no vent pipe shall be used as a soil or waste pipe, nor shall a soil or waste pipe be used as a vent. Also, single-stack drainage and venting systems with unvented branch lines are prohibited.
310.5 Obstruction of Flow. No fitting, fixture and piping ¶
310.5 Obstruction of Flow. No fitting, fixture and piping connection, appliance, device, or method of installation that obstructs or retards the flow of water, wastes, sewage, or air in the drainage or venting systems, in an amount exceeding the normal frictional resistance to flow, shall be used unless it is indicated as acceptable in this code or is approved in accordance with Section 301.2 of this code. The enlargement of a 3 inch (80 mm) closet bend or stub to 4 inches (100 mm) shall not be considered an obstruction.
310.6 Dissimilar Metals. Except for necessary valves, ¶
310.6 Dissimilar Metals. Except for necessary valves, where intermembering or mixing of dissimilar metals occurs, the point of connection shall be confined to exposed or accessible locations.
310.7 Direction of Flow. Valves, pipes, and fittings shall ¶
310.7 Direction of Flow. Valves, pipes, and fittings shall be installed in correct relationship to the direction of flow.
310.8 Screwed Fittings. Screwed fittings shall be ABS, ¶
310.8 Screwed Fittings. Screwed fittings shall be ABS, cast-iron, copper, copper alloy, malleable iron, PVC, steel, or other approved materials. Threads shall be tapped out of solid metal or molded in solid ABS or PVC. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. GENERAL REGULATIONS
310.9 Female Plastic Connections. Female plastic ¶
310.9 Female Plastic Connections. Female plastic tapered (NPT) threaded connections shall not be allowed to be used when threaded onto a male metallic connection. Exception: Female plastic parallel (straight) threaded connections shall be permitted.
310.10 ABS and PVC Transition Joints. ¶
310.10 ABS and PVC Transition Joints. Except as provided in Section 705.9.4, PVC and ABS pipe and fittings shall not be solvent welded to dissimilar material.
310.11 [OSHPD 1, 2, 3, 4 & 5] Drainage piping over oper- ¶
310.11 [OSHPD 1, 2, 3, 4 & 5] Drainage piping over oper- ating and delivery rooms, nurseries, food preparation cen- ters, food-serving facilities, food storage areas, compounding ante and buffer rooms and other sensitive areas shall be kept to a minimum and shall not be exposed. Special precautions shall be taken to protect these areas from possible leakage from necessary overhead drainage piping systems. Piping over switchboards, panel boards, and motor control centers are subject to restrictions of the California Electrical Code where applicable.
310.12 [OSHPD 1, 3, 4 & 5] Floor drains, waste traps, san- ¶
310.12 [OSHPD 1, 3, 4 & 5] Floor drains, waste traps, san- itary drainage cleanouts and handwashing fixtures shall not be installed in operating and delivery rooms. Floor drains with self-priming traps may be installed in cystoscopic rooms. Floor drains shall not be installed in compounding buffer or ante rooms.
310.13 [SFM] For applications listed in Section 1.11.0 regu- ¶
310.13 [SFM] For applications listed in Section 1.11.0 regu- lated by the Office of the State Fire Marshal, plastic piping shall not be exposed as a portion of the interior room finish in a build- ing or structure if the piping has a flame-spread rating exceed- ing 75 when tested in accordance with ASTM E84, “Test for Surface Burning Characteristics of Building Materials.”
310.14 Services/Systems and Utilities. [OSHPD 1, 2, 4 ¶
310.14 Services/Systems and Utilities. [OSHPD 1, 2, 4 & 5] Refer to Sections 1224.4.1, 1225.2.1 and 1228.4.1.1, Cal- ifornia Building Code.
310.15 Telephone and Data Equipment Rooms. ¶
310.15 Telephone and Data Equipment Rooms. [OSHPD 1, 4 & 5] Where telecommunications service entrance rooms, technology equipment centers, or technology distribution rooms are provided in accordance with Section
1224.5 of the California Building Code, plumbing equipment ¶
1224.5 of the California Building Code, plumbing equipment and fixtures that are not directly related to the support of the room shall not be installed in or pass through the room.
311.0 Independent Systems. ¶
311.1 General. The drainage system of each new building ¶
311.1 General. The drainage system of each new building and new work installed in an existing building shall be separate and independent from that of any other building, and, where available, every building shall have an independent connection with a public or private sewer. Exception: Where one building stands in the rear of another building on an interior lot, and no public or private sewer is available or can be constructed to the rear building through an adjoining court, yard, or driveway, the building drain from the front building shall be permitted to be extended to the rear building.…
312.0 Protection of Piping, Tubing, Materials, and ¶
312.0 Protection of Piping, Tubing, Materials, and Structures.
312.1 General. Piping passing under or through walls shall ¶
312.1 General. Piping passing under or through walls shall be protected from breakage. Piping passing through or under cinders or other corrosive materials shall be protected from external corrosion in an approved manner. Approved provisions shall be made for expansion of hot water piping. Voids around piping passing through concrete floors on the ground shall be sealed.
312.2 Installation. Piping in connection with a plumbing ¶
312.2 Installation. Piping in connection with a plumbing system shall be so installed that piping or connections will not be subject to undue strains or stresses, and provisions shall be made for expansion, contraction, and structural settlement. No plumbing piping shall be directly embedded in concrete or masonry. No structural member shall be seriously weakened or impaired by cutting, notching, or otherwise, as defined in the California Building Code or California Residential Code .
312.3 Building Sewer and Drainage Piping. ¶
312.3 Building Sewer and Drainage Piping. No building sewer or other drainage piping or part thereof, constructed of materials other than those approved for use under or within a building, shall be installed under or within 2 feet (610 mm) of a building or structure, or less than 1 foot (305 mm) below the surface of the ground.
312.4 Corrosion, Erosion, and Mechanical Damage. ¶
312.4 Corrosion, Erosion, and Mechanical Damage. Piping subject to corrosion, erosion, or mechanical damage shall be protected in an approved manner.
312.5 Protectively Coated Pipe. Protectively coated pipe ¶
312.5 Protectively Coated Pipe. Protectively coated pipe or tubing shall be inspected and tested, and a visible void, damage, or imperfection to the pipe coating shall be repaired in an approved manner.
312.6 Freezing Protection. No water, soil, or waste pipe ¶
312.6 Freezing Protection. No water, soil, or waste pipe shall be installed or permitted outside of a building, in attics or crawl spaces, or in an exterior wall unless, where necessary, adequate provision is made to protect such pipe from freezing.
312.7 Fire-Resistant Construction. Piping penetrations ¶
312.7 Fire-Resistant Construction. Piping penetrations of fire-resistance-rated walls, partitions, floors, floor/ceiling assemblies, roof/ceiling assemblies, or shaft enclosures shall be protected in accordance with the requirements of the Cal- ifornia Building Code or California Residential Code .
312.8 Waterproofing of Openings. Joints at the roof ¶
312.8 Waterproofing of Openings. Joints at the roof around pipes, ducts, or other appurtenances shall be made watertight by the use of lead, copper, galvanized iron, or other approved flashings or flashing material. Exterior wall openings shall be made watertight. Counterflashing shall not restrict the required internal cross-sectional area of the vent.
312.9 Steel Nail Plates. ¶
312.9 Steel Nail Plates. Plastic piping or tubing, and copper or copper alloy piping or tubing penetrating framing members to within 1 inch (25.4 mm) of the exposed framing shall be protected by steel nail plates not less than No. 18 gauge (0.0478 inches) (1.2 mm) in thickness. The steel nail plate shall extend along the framing member not less than 1 [1] ⁄ 2 inches (38 mm) beyond the outside diameter of the pipe or tubing. Fuel gas piping shall be protected in accordance with Section 1210.4.3.
312.10 Sleeves. ¶
312.10 Sleeves. Sleeves shall be provided to protect piping through concrete and masonry walls, and concrete floors. Exception: Sleeves shall not be required where openings are drilled or bored. 52 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. GENERAL REGULATIONS 312.10.1 Building Loads. Piping through concrete or masonry walls shall not be subject to a load from building construction. 312.10.2 Exterior Walls. In exterior walls, annular space between sleeves and pipes shall be sealed and made…
312.11 Structural Members. ¶
312.11 Structural Members. A structural member weakened or impaired by cutting, notching, or otherwise shall be reinforced, repaired, or replaced so as to be left in a safe structural condition in accordance with the requirements of the California Building Code or California Residential Code .
312.12 Rodentproofing. Strainer plates on drain inlets ¶
312.12 Rodentproofing. Strainer plates on drain inlets shall be designed and installed so that no opening exceeds [1] ⁄ 2 of an inch (12.7 mm) in the least dimension. 312.12.1 Meter Boxes. Meter boxes shall be con structed in such a manner as to restrict rodents or vermin from entering a building by following the service pipes from the box into the building. 312.12.2 Metal Collars. In or on buildings where openings have been made in walls, floors, or ceilings for the passage of pipes, such openings shall be closed and protected by the installation of approved metal collars securely fastened…
313.0 Hangers, Supports, and Anchors. ¶
313.0 Hangers, Supports, and Anchors.
313.1 General. Piping, tubing, fixtures, appliances, and ¶
313.1 General. Piping, tubing, fixtures, appliances, and appurtenances shall be supported in accordance with this code, the manufacturer’s installation instructions, and in accordance with the Authority Having Jurisdiction. Seismic restraints shall be in accordance with the building code.
313.2 Material. Hangers, supports, and anchors shall be of ¶
313.2 Material. Hangers, supports, and anchors shall be of sufficient strength to support the weight of the pipe or tubing and its contents. Piping or tubing shall be isolated from incompatible materials.
313.3 Suspended Piping. ¶
313.3 Suspended Piping. Suspended piping shall be supported at intervals not to exceed those shown in Table 313.3.
313.4 Alignment. ¶
313.4 Alignment. Piping shall be supported in such a manner as to maintain its alignment and prevent sagging.
313.5 Underground Installation. Piping in the ground ¶
313.5 Underground Installation. Piping in the ground shall be laid on a firm bed for its entire length; where other support is otherwise provided, it shall be approved in accordance with Section 301.2.
313.6 Hanger Rod Sizes. Hanger rod sizes shall be not ¶
313.6 Hanger Rod Sizes. Hanger rod sizes shall be not smaller than those shown in Table 313.6. TABLE 313.6 HANGER ROD SIZES PIPE AND TUBE SIZE<br(inches)ROD SIZE<br(inches) ------ <br1⁄2 – 43⁄8 <br5 – 81⁄2 <br10 – 125⁄8 For SI units: 1 inch = 25.4 mm
313.7 Gas Piping. Gas piping shall be supported by metal ¶
313.7 Gas Piping. Gas piping shall be supported by metal straps or hooks at intervals not to exceed those shown in Table 1210.3.5.1.
313.8 [OSHPD 1, 2, 3, 4 & 5] Refer to Title 24, Part 2 of the ¶
313.8 [OSHPD 1, 2, 3, 4 & 5] Refer to Title 24, Part 2 of the California Building Code for seismic anchorage and bracing requirements and accommodations for building displace- ments.
314.0 Trenching, Excavation, and Backfill. ¶
314.0 Trenching, Excavation, and Backfill.
314.1 Trenches. Trenches deeper than the footing of a ¶
314.1 Trenches. Trenches deeper than the footing of a building or structure, and paralleling the same, shall be located not less than 45 degrees (0.79 rad) from the bottom exterior edge of the footing, or as approved in accordance with Section 301.0.
314.2 Tunneling and Driving. Tunneling and driving shall ¶
314.2 Tunneling and Driving. Tunneling and driving shall be permitted to be done in yards, courts, or driveways of a building site. Where sufficient depth is available to permit, tunnels shall be permitted to be used between open-cut trenches. Tunnels shall have a clear height of 2 feet (610 mm) above the pipe and shall be limited in length to one-half the depth of the trench, with a maximum length of 8 feet (2438 mm). Where pipes are driven, the drive pipe shall be not less than one size larger than the pipe to be laid.
314.3 Open Trenches. Excavations required to be made ¶
314.3 Open Trenches. Excavations required to be made for the installation of a building drainage system or part thereof, within the walls of a building, shall be open trench work and shall be kept open until the piping has been inspected, tested, and accepted.
314.4 Excavations. ¶
314.4 Excavations. Excavations shall be completely backfilled as soon after inspection as practicable. Precaution shall be taken to ensure compactness of backfill around piping without damage to such piping. Trenches shall be backfilled in thin layers to 12 inches (305 mm) above the top of the piping with clean earth, which shall not contain stones, boulders, cinder fill, frozen earth, construction debris, or other materials that will damage or break the piping or cause corrosive action. Mechanical devices such as bulldozers, graders, etc., shall be permitted to be then used to complete…
315.0 Joints and Connections. ¶
315.1 Unions. Approved unions shall be permitted to be ¶
315.1 Unions. Approved unions shall be permitted to be used in drainage piping where accessibly located in the trap seal or between a fixture and its trap; in the vent system, except underground or in wet vents; at any point in the water supply system; and in gas piping as permitted by Section 1212.6.
315.2 Prohibited Joints and Connections. A fitting or ¶
315.2 Prohibited Joints and Connections. A fitting or connection that has an enlargement, chamber, or recess with a ledge, shoulder, or reduction of pipe area that offers an obstruction to flow through the drain shall be prohibited.
316.0 Increasers and Reducers. ¶
316.1 General. Where different sizes of pipes and fittings ¶
316.1 General. Where different sizes of pipes and fittings are to be connected, the proper size increasers or reducers or reducing fittings shall be used between the two sizes. Copper alloy or cast-iron body cleanouts shall not be used as a reducer or adapter from cast-iron drainage pipe to iron pipe size (IPS) pipe.
317.0 Food-Handling Establishments. ¶
317.1 General. Food or drink shall not be stored, prepared, ¶
317.1 General. Food or drink shall not be stored, prepared, or displayed beneath soil or drainpipes unless those areas are protected against leakage or condensation from such pipes reaching the food or drink as described below. Where building design requires that soil or drainpipes be located over such areas, the installation shall be made with the least possible number of joints and shall be installed to connect to the nearest adequately sized vertical stack with the provisions as follows: (1) Openings through floors over such areas shall be sealed watertight to the floor construction. (2)…
318.0 Test Gauges. ¶
318.1 General. Tests in accordance with this code, which ¶
318.1 General. Tests in accordance with this code, which are performed utilizing dial gauges, shall be limited to gauges having the following pressure graduations or incrementations.
318.2 Pressure Tests (10 psi or less). ¶
318.2 Pressure Tests (10 psi or less). Required pressure tests of 10 pounds-force per square inch (psi) (69 kPa) or less shall be performed with gauges of 0.10 psi (0.69 kPa) incrementation or less.
318.3 Pressure Tests (greater than 10 psi to 100 psi). ¶
318.3 Pressure Tests (greater than 10 psi to 100 psi). Required pressure tests exceeding 10 psi (69 kPa) but less than or equal to 100 psi (689 kPa) shall be performed with gauges of 1 psi (7 kPa) incrementation or less.
318.4 Pressure Tests (exceeding 100 psi). Required ¶
318.4 Pressure Tests (exceeding 100 psi). Required pressure tests exceeding 100 psi (689 kPa) shall be performed with gauges incremented for 2 percent or less of the required test pressure.
318.5 Pressure Range. Test gauges shall have a pressure ¶
318.5 Pressure Range. Test gauges shall have a pressure range not exceeding twice the test pressure applied.
319.0 Medical Gas and Vacuum Systems. ¶
319.0 Medical Gas and Vacuum Systems.
319.1 General. Such piping shall be in accordance with the ¶
319.1 General. Such piping shall be in accordance with the requirements of Chapter 13. The Authority Having Jurisdiction shall require evidence of the competency of the installers and verifiers.
320.0 Rehabilitation of Piping Systems. ¶
320.0 Rehabilitation of Piping Systems.
320.1 General. ¶
320.1 General. Where pressure piping systems are rehabilitated using an epoxy lining system, it shall be in accordance with ASTM F2831.
321.0 Essential Plumbing Provisions. [OSHPD 1, 2, 3 ¶
321.0 Essential Plumbing Provisions. [OSHPD 1, 2, 3 (Surgical Clinics), 4 & 5] During periods of power out- ages essential electrical power shall be provided for the fol- lowing equipment: (1) Domestic water booster pumps. (2) Domestic hot water circulating pumps. (3) Sewage ejector pumps. (4) Sump pumps and drainage pumps. (5) Domestic water heating equipment and their controls. (6) Fuel pumps. (7) Grease removal devices requiring electrical power. (8) Domestic hot water high temperature alarm.
322.0 Psychiatric Services. [OSHPD 1, 2, 4 & 5] For ¶
322.0 Psychiatric Services. [OSHPD 1, 2, 4 & 5] For projects associated with provision of psychiatric services in acute psychiatric hospitals, general acute care hospitals, and special treatment program service units in skilled nursing facilities, special design considerations for injury and suicide prevention shall be given to shower, bath, toilet, and sink plumbing fixtures. Shower heads shall be of flush-mounted design to minimize anchor points. 54 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or…
323.0 Plumbing Equipment Schedules. [OSHPD 1, 2, ¶
323.0 Plumbing Equipment Schedules. [OSHPD 1, 2, 3, 4 & 5] Plumbing equipment schedules shall clearly indi- cate which equipment will be on essential power or appro- priate special seismic certifications. TABLE 313.3 HANGERS AND SUPPORTS MATERIALSTYPES OF JOINTSHORIZONTALVERTICAL ------------ CastLead and Oakum5 feet, except 10 feet where 10 foot<brlengths are installed1, 2, 3Base and each floor,<brnot to exceed 15 feet CastCompression GasketEvery other joint, unless over 4 feet<brthen support each joint1, 2, 3Base and each floor,<brnot to exceed 15 feet Cast-Iron HublessShielded…
401.0 General. ¶
401.1 Applicability. This chapter shall govern the materials ¶
401.1 Applicability. This chapter shall govern the materials and installation of plumbing fixtures, including faucets and fixture fittings, and the minimum number of plumbing fixtures required based on occupancy.
401.2 Quality of Fixtures. ¶
401.2 Quality of Fixtures. Plumbing fixtures shall be constructed of dense, durable, non-absorbent materials and shall have smooth, impervious surfaces, free from unnecessary concealed fouling surfaces.
401.3 Water-Conserving Fixtures and Fittings. ¶
401.3 Water-Conserving Fixtures and Fittings. Note 1: [BSC-CG & DSA-SS] Flow rates for specified plumbing fixtures for mandatory nonresidential construction are contained in Chapter 5, Division 5.3 of the California Green Building Standards Code (Part 11, Title 24, Califor- nia Code of Regulations - CALGreen). Scoping provisions applicable to nonresidential additions and alterations are contained in Section 301.3 of CALGreen. Note 2: [BSC-CG] On and after January 1, 2014, certain commercial real property, as defined in Civil Code Section 1101.3, shall have its noncompliant plumbing fixtures…
1101.1 et seq. for definitions, types of commercial real prop- ¶
1101.1 et seq. for definitions, types of commercial real prop- erty affected, effective dates, circumstances necessitating replacement of noncompliant plumbing fixtures, and duties and responsibilities for ensuring compliance. [HCD-1] All noncompliant plumbing fixtures in any residen- tial real property shall be replaced with water-conserving plumbing fixtures. Plumbing fixture replacement is required prior to issuance of a certificate of final completion, certificate of occupancy, or final permit approval by the local building department. See Civil Code Section 1101.1, et seq., for the def-…
402.0 Installation. ¶
402.1 Cleaning. Plumbing fixtures shall be installed in a ¶
402.1 Cleaning. Plumbing fixtures shall be installed in a manner to afford easy access for repairs and cleaning. Pipes from fixtures shall be run to the nearest wall.
402.2 Joints. Where a fixture comes in contact with the wall ¶
402.2 Joints. Where a fixture comes in contact with the wall or floor, the joint between the fixture and the wall or floor shall be made watertight.
402.3 Securing Fixtures. Floor-outlet or floor-mounted ¶
402.3 Securing Fixtures. Floor-outlet or floor-mounted fixtures shall be rigidly secured to the drainage connection and to the floor, where so designed, by screws or bolts of copper, copper alloy, or other equally corrosion-resistant material.
402.4 Wall-Hung Fixtures. Wall-hung fixtures shall be ¶
402.4 Wall-Hung Fixtures. Wall-hung fixtures shall be rigidly supported by metal supporting members so that no strain is transmitted to the connections. Floor-affixed supports for off-the-floor plumbing fixtures for public use shall comply with ASME A112.6.1M. Framing-affixed supports for off-thefloor water closets with concealed tanks shall comply with ASME A112.6.2. Flush tanks and similar appurtenances shall be secured by approved non-corrosive screws or bolts.
402.5 Setting. ¶
402.5 Setting. Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than 15 inches (381 mm) from its center to a side wall or obstruction or closer than 30 inches (762 mm) center to center to a similar fixture. The clear space in front of a water closet, lavatory, or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition or closer than 24 inches (610 mm) center to center. Exception: The installation of paper dispensers or…
402.6 Flanged Fixture Connections. ¶
402.6 Flanged Fixture Connections. Fixture connections between drainage pipes and water closets, floor outlet service sinks and urinals shall be made using an approved copper alloy, hard lead, ABS, PVC, or iron flanges caulked, soldered, solvent cemented; rubber compression gaskets; or screwed to the drainage pipe. The connection shall be bolted with an approved gasket, washer, or setting compound between the fixture and the connection. The bottom of the flange shall be set on the top of the finished floor. Wall-mounted water closet fixtures shall be securely bolted to an approved carrier…
402.7 Supply Fittings. The supply lines and fittings for ¶
402.7 Supply Fittings. The supply lines and fittings for every plumbing fixture shall be so installed as to prevent backflow in accordance with Chapter 6.
402.8 Installation. Fixtures shall be installed in accordance ¶
402.8 Installation. Fixtures shall be installed in accordance with the manufacturer’s installation instructions.
402.9 Design and Installation of Plumbing Fixtures. ¶
402.9 Design and Installation of Plumbing Fixtures. Plumbing fixtures shall be installed in accordance with the manufacturer’s installation instructions. The means of backflow prevention shall not be compromised by the designated fixture fitting mounting surface.
402.10 Slip Joint Connections. ¶
402.10 Slip Joint Connections. Fixtures having concealed slip joint connections shall be provided with an access panel or utility space not less than 12 inches (305 mm) in its least dimension and so arranged without obstructions as to make such connections accessible for inspection and repair.
402.11 Future Fixtures. Where provisions are made for the ¶
402.11 Future Fixtures. Where provisions are made for the future installation of fixtures, those provided for shall be considered in determining the required sizes of the drain and water supply piping. Construction for future installations shall be terminated with a plugged fitting or fittings. Where the plugged fitting is at the point where the trap of a fixture is installed, the plumbing system for such fixture shall be complete and be in accordance with the plumbing requirements of this code.
403.0 Accessible Plumbing Facilities. ¶
403.0 Accessible Plumbing Facilities.
403.1 General. Where accessible facilities are required in ¶
403.1 General. Where accessible facilities are required in applicable building regulations, the facilities shall be installed in accordance with those regulations. [HCD 1-AC] For spe- cific requirements regarding accommodations for persons with disabilities, see Chapter 11A of the California Building Code.
403.2 Fixtures and Fixture Fittings for Persons with ¶
403.2 Fixtures and Fixture Fittings for Persons with Disabilities. Plumbing fixtures and fixture fittings for persons with disabilities shall be in accordance with ICC A117.1 and the applicable standards referenced in Chapter 4. [HCD 1-AC] Specific requirements regarding accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code.
403.3 Exposed Pipes and Surfaces. Water supply and ¶
403.3 Exposed Pipes and Surfaces. Water supply and drainpipes under accessible lavatories and sinks shall be insulated or otherwise be configured to protect against contact. Protectors, insulators, or both shall comply with ASME A112.18.9 or ASTM C1822. [HCD 1-AC] Specific requirements regard- ing accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code.
404.0 Waste Fittings and Overflows. ¶
404.1 Waste Fittings. Waste fittings shall comply with ¶
404.1 Waste Fittings. Waste fittings shall comply with ASME A112.18.2/CSA B125.2, ASTM F409 or Table 701.2 for aboveground drainage piping and fittings.
404.2 Overflows. ¶
404.2 Overflows. Where a fixture is provided with an overflow, the overflow shall comply with Section 404.2.1 or Section 404.2.2. 404.2.1 Sinks, Lavatories, and Bathtubs. The waste shall be so arranged that the standing water in the fixture shall not rise in the overflow where the stopper is closed or remain in the overflow where the fixture is empty. The overflow pipe from a fixture shall be connected to the house or inlet side of the fixture trap. 404.2.2 Water Closets and Urinals. Overflows on flush tanks shall be permitted to discharge into the water closets or urinals served by them.
405.0 Prohibited Fixtures. ¶
405.1 Prohibited Water Closets. Water closets having an ¶
405.1 Prohibited Water Closets. Water closets having an invisible seal or an unventilated space or having walls which are not thoroughly washed at each discharge shall be prohibited. A water closet that might permit siphonage of the contents of the bowl back into the tank shall be prohibited.
405.2 Prohibited Urinals. Trough urinals and urinals with ¶
405.2 Prohibited Urinals. Trough urinals and urinals with an invisible seal shall be prohibited.
405.3 Miscellaneous Fixtures. Fixed wooden, or tile wash ¶
405.3 Miscellaneous Fixtures. Fixed wooden, or tile wash sinks for domestic use shall not be installed in a building designed or used for human habitation. No sheet metal-lined wooden bathtub shall be installed or reconnected. No dry or chemical closet (toilet) shall be installed in a building used for human habitation unless first approved by the Health Officer. 60 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS
406.0 Special Fixtures and Specialties. ¶
406.0 Special Fixtures and Specialties.
406.1 Water and Waste Connections. ¶
406.1 Water and Waste Connections. Baptisteries, ornamental and lily ponds, aquaria, ornamental fountain basins, and similar fixtures and specialties requiring water, waste connections, or both shall be submitted for approval to the Authority Having Jurisdiction prior to installation.
406.2 Special Use Sinks. Restaurant kitchen and other ¶
406.2 Special Use Sinks. Restaurant kitchen and other special use sinks shall be permitted to be made of approvedtype bonderized and galvanized sheet steel of not less than No. 16 U.S. gauge (0.0635 inches) (1.6 mm). Sheet-metal plumbing fixtures shall be adequately designed, constructed, and braced in an approved manner to accomplish their intended purpose.
406.3 Special Use Fixtures. Special use fixtures shall be ¶
406.3 Special Use Fixtures. Special use fixtures shall be made of one of the following: (1) Soapstone (2) Chemical stoneware (3) Copper-based alloy (4) Nickel-based alloy (5) Corrosion-resistant steel (6) Other materials suited for the intended use of the fixture
406.4 Zinc Alloy Components. Zinc alloy components ¶
406.4 Zinc Alloy Components. Zinc alloy components shall comply with applicable nationally recognized standards and shall be used in accordance with their listing.
407.0 Lavatories. ¶
407.1 Application. Lavatories shall comply with ASME ¶
407.1 Application. Lavatories shall comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, ASME A112.19.12, CSA B45.5/IAPMO Z124, CSA B45.8/IAPMO Z403, CSA B45.11/IAPMO Z401 or CSA B45.12/IAPMO Z402. Group wash fixtures shall comply with the requirements of Section 401.2. Every 20 inches (508 mm) of rim space of a group wash fixture shall be considered as one lavatory for determining the number of lavatories required in accordance with Table 422.1. Lavatory assemblies with automatic soap dispensers, faucets, or hand dryers shall comply with IAPMO IGC 127.
407.2 Water Consumption. The maximum water flow rate ¶
407.2 Water Consumption. The maximum water flow rate of faucets shall comply with Section 407.2.1 through Section 407.2.4 . 407.2.1 Public Lavatory Faucets . The maximum flow rate for public lavatory faucets shall not exceed 0.5 gpm at 60 psi (1.9 L/m at 414 kPa). 407.2.2 Residential Lavatory Faucets. [HCD 1] The maximum flow rate of residential lavatory faucets shall not exceed 1.2 gallons (4.54 L) per minute at 60 psi. The minimum flow rate of residential lavatory faucets shall not be less than 0.8 gallons (3.03 L) per minute at 20 psi. 407.2.3 Lavatory Faucets in Common and Public Use…
407.3 Limitation of Hot Water Temperature for Public ¶
407.3 Limitation of Hot Water Temperature for Public Lavatories. Hot water delivered from public-use lavatories shall be limited to a maximum temperature of 120°F (49°C). The maximum temperature shall be regulated by one of the following means: (1) A limiting device conforming to either ASSE 1070/ASME A112.1070/CSA B125.70, or (2) A water heater conforming to ASSE 1084.
407.4 Transient Public Lavatories. ¶
407.4 Transient Public Lavatories. Self-closing or metering faucets shall be installed on lavatories intended to serve the transient public, such as those in, but not limited to service stations, train stations, airports, restaurants, and convention halls.
407.5 Waste Outlet. Lavatories shall have a waste outlet ¶
407.5 Waste Outlet. Lavatories shall have a waste outlet and fixture tailpiece not less than 1 [1] ⁄ 4 inches (32 mm) in diameter. Continuous wastes and fixture tailpieces shall be constructed from the materials specified in Section 701.4. Waste outlets shall be provided with an approved stopper or strainer.
407.6 Overflow. Where overflows are provided, they shall ¶
407.6 Overflow. Where overflows are provided, they shall be installed in accordance with Section 404.2.
408.0 Showers. ¶
408.1 Application. Manufactured shower receptors and ¶
408.1 Application. Manufactured shower receptors and shower bases shall comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSAB45.4, CSA B45.12/IAPMO Z402, or CSA B45.5/IAPMO Z124. Prefabricated shower enclosures shall comply with IAPMO IGC 154.
408.2 Tileable Shower Receptors. ¶
408.2 Tileable Shower Receptors. Tileable shower receptors and shower kits shall comply with IAPMO PS 106.
408.3 Water Consumption. Showerheads shall have a « ¶
408.3 Water Consumption. Showerheads shall have a « maximum flow rate of not more than 1.8 gpm at 80 psi ( 6.81 L/m at 552 kPa). Body sprays shall have a flow rate of not more than 1.8 gpm at 80 psi ( 6.81 L/m at 552 kPa). [HCD 1] Residential showerheads shall comply with Division 4.3 of the California Green Building Standards Code (CALGreen). Residential body sprays shall comply with the showerhead requirements in Division 4.3 of CALGreen. [BSC-CG & DSA-SS] Nonresidential body sprays shall comply with the showerhead requirements in Division 5.3 of CALGreen. 408.3.1 Single Showerhead. [BSC-CG…
408.6 Finished Curb or Threshold. Where a shower ¶
408.6 Finished Curb or Threshold. Where a shower receptor has a finished dam, curb, or threshold, it shall be not less than 1 inch (25.4 mm) lower than the sides and back of such receptor. In no case, shall a dam or threshold be less than 2 inches (51 mm) or exceeding 9 inches (229 mm) in depth where measured from the top of the dam or threshold to the top of the drain. Each such receptor shall be provided with a nailing flange either integral or field installed in accordance with the manufacturer’s installation instructions. The flange shall be watertight and extend vertically not less than…
408.7 Shower Compartments. Shower compartments ¶
408.7 Shower Compartments. Shower compartments shall have a finished interior in accordance with the following: (1) Not less than 1024 square inches (0.6606 m [2] ). (2) Be capable of encompassing a 30 inch (762 mm) circle. The minimum required area and dimensions shall be measured at a height equal to the top of the threshold and a point tangent to its centerline. The area and dimensions shall be maintained to a point of not less than 70 inches (1778 mm) above the shower drain outlet with no protrusions other than the fixture valve or valves, showerheads, soap dishes, shelves, and safety…
408.8 Lining for Showers and Receptors. Shower ¶
408.8 Lining for Showers and Receptors. Shower receptors built on-site shall be watertight and shall be constructed from approved-type dense, nonabsorbent, and noncorrosive materials. Each such receptor shall be adequately reinforced, shall be provided with an approved flanged floor drain designed to make a watertight joint on the floor, and shall have smooth, impervious, and durable surfaces. » » » » 408.3.2 Multiple Showerheads Serving One Shower. [BSC-CG & DSA-SS] When a shower is served by more than one showerhead, the combined flow rate of all showerheads and/or other shower outlets…
408.4 Individual Shower and Tub-Shower Combina- ¶
408.4 Individual Shower and Tub-Shower Combina- tion Control Valves. Showers and tub-shower combinations shall be provided with individual control valves of the pressure balance, thermostatic, or combination pressure balance/thermostatic mixing valve type that provide scald and thermal shock protection for the rated flow rate of the installed showerhead. These valves shall be installed at the point of use and comply with ASSE 1016/ASME A112.1016/CSA B125.16 or ASME A112.18.1/CSA B125.1. 408.4.1 Gang Showers. Where gang showers are supplied with a single temperature-controlled water supply…
408.5 Waste Outlet. Showers shall have a waste outlet and ¶
408.5 Waste Outlet. Showers shall have a waste outlet and fixture tailpiece not less than 2 inches (50 mm) in diameter. Fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping. Strainers serving shower drains shall comply with ASME A112.18.2/CSA B125.2. 62 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS shall be insulated from conducting substances, other than the connecting drain, by 15 pound (6.8 kg)…
408.9 Public Shower Floors. Floors of public shower ¶
408.9 Public Shower Floors. Floors of public shower rooms shall have a nonskid surface and shall be drained in such a manner that wastewater from one bather shall not pass over areas occupied by other bathers. Gutters in public or gang shower rooms shall have rounded corners for easy cleaning and shall be sloped not less than 2 percent toward drains. Drains in gutters shall be spaced at a maximum of 8 feet (2438 mm) from sidewalls nor more than 16 feet (4877 mm) apart.
408.10 Location of Valves and Heads. Control valves ¶
408.10 Location of Valves and Heads. Control valves and showerheads shall be located on the sidewall of shower compartments or otherwise arranged so that the showerhead does not discharge directly at the entrance to the compartment so that the bather can adjust the valves before stepping into the shower spray.
408.11 Water Supply Riser. A water supply riser from the ¶
408.11 Water Supply Riser. A water supply riser from the shower valve to the showerhead outlet, whether exposed or not, shall be securely attached to the structure.
409.0 Bathtubs and Whirlpool Bathtubs. ¶
409.0 Bathtubs and Whirlpool Bathtubs.
409.1 Application. Bathtubs shall comply with ASME ¶
409.1 Application. Bathtubs shall comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, CSA B45.5/IAPMO Z124, or CSA B45.12/IAPMO Z402. Whirlpool bathtubs shall comply with ASME A112.19.7/CSA B45.10. Pressure sealed doors within a bathtub or whirlpool bathtub enclosure shall comply with ASME A112.19.15.
409.2 Waste Outlet. Bathtubs and whirlpool bathtubs shall ¶
409.2 Waste Outlet. Bathtubs and whirlpool bathtubs shall have a waste outlet and fixture tailpiece not less than 1 [1] ⁄ 2 inches (40 mm) in diameter. Fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping. Waste outlets shall be provided with an approved stopper or strainer.
409.3 Overflow. Where overflows are provided, they shall ¶
409.3 Overflow. Where overflows are provided, they shall be installed in accordance with Section 404.2.
409.4 Limitation of Hot Water Temperature in Bath- ¶
409.4 Limitation of Hot Water Temperature in Bath- tubs and Whirlpool Bathtubs. The maximum hot water temperature discharging from the bathtub and whirlpool bathtub filler shall be limited to 120°F (49°C). The maximum temperature shall be regulated by one of the following means: « « « « « » » » Shower receptors shall have the subfloor and rough side of walls to a height of not less than 3 inches (76 mm) above the top of the finished dam or threshold shall be first lined with sheet plastic, lead, or copper, or shall be lined with other durable and watertight materials. Showers that are…
411.3 Water Closet Seats. ¶
411.3 Water Closet Seats. Water closet seats shall be properly sized for the water closet bowl type, and shall be of smooth, non-absorbent material. Seats, for public use, shall be of the elongated type and either of the open front type or have an automatic seat cover dispenser. Water closet seats shall be provided with or without covers. Plastic seats shall comply with IAPMO/ANSI Z124.5.
411.4 Personal Hygiene Devices. Water closets with ¶
411.4 Personal Hygiene Devices. Water closets with integral personal hygiene devices shall comply with ASME A112.4.2/CSA B45.16.
412.0 Urinals. ¶
412.1 Application. Urinals shall comply with ASME ¶
412.1 Application. Urinals shall comply with ASME A112.19.2/CSA B45.1, ASME A112.19.19, or CSA B45.5/IAPMO Z124. Wall-mounted urinals shall have an average water consumption not to exceed 0.125 gallons (0.47 L) per flush. Other urinals shall have an average water con- sumption not to exceed 0.5 gallons (1.89 L) per flush. 412.1.1 Wall-Mounted Urinals. [BSC-CG & DSA- SS] The effective flush volume of wall-mounted urinals shall not exceed 0.125 gallons (0.47 L) per flush in com- pliance with Chapter 5, Division 5.3, of the California Green Building Standards Code (CALGreen). 412.1.2…
409.5 Backflow Protection. The water supply to a bathtub ¶
409.5 Backflow Protection. The water supply to a bathtub and whirlpool bathtub filler valve shall be protected by an air gap or in accordance with Section 417.0.
409.6 Installation and Access. Bathtubs and whirlpool ¶
409.6 Installation and Access. Bathtubs and whirlpool bathtubs shall be installed in accordance with the manufac turer’s installation instructions. Access openings shall be of a size and opening to permit the removal and replacement of the circulation pump. Whirlpool pump access located in the crawl space shall be located not more than 20 feet (6096 mm) from an access door, trap door, or crawl hole. The circulation pump shall be located above the crown weir of the trap. The pump and the circulation piping shall be self-draining to minimize water retention. 409.6.1 Suction Fittings. Suction…
410.0 Bidets. ¶
410.1 Application. Bidets shall comply with ASME ¶
410.1 Application. Bidets shall comply with ASME A112.19.2/CSA B45.1 or ASME A112.19.3/CSA B45.4.
410.2 Backflow Protection. The water supply to the bidet ¶
410.2 Backflow Protection. The water supply to the bidet shall be protected by an air gap or in accordance with Section 603.3.2, Section 603.3.5, or Section 603.3.6.
410.3 Limitation of Water Temperature in Bidets. The ¶
410.3 Limitation of Water Temperature in Bidets. The maximum hot water temperature discharging from a bidet shall be limited to 110°F (43°C). The maximum temperature shall be regulated by one of the following means: (1) A limiting device conforming to either ASSE 1070/ASME A112.1070/CSA B125.70 or CSA B125.3. (2) A water heater conforming to ASSE 1084.
411.0 Water Closets. ¶
411.1 Application. Water closets shall comply with ASME ¶
411.1 Application. Water closets shall comply with ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, or CSA B45.5/IAPMO Z124. Water closet bowls for public use shall be of the elongated type. In nurseries, schools, and other similar places where plumbing fixtures are provided for the use of children less than 6 years of age, water closets shall be of a size and height suitable for children’s use.
411.2 Water Consumption. The effective flush volume of ¶
411.2 Water Consumption. The effective flush volume of all water closets shall not exceed 1.28 gallons (4.8 L) per flush when tested in accordance with ASME A112.19.2/CSA
B45.1 . ¶
B45.1 . 64 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS 412.1.3 Nonwater Urinals. Nonwater urinals shall have a liquid barrier sealant to maintain a trap seal. Nonwater urinals shall permit the uninhibited flow of waste through the urinal to the sanitary drainage system. Nonwater urinals shall be cleaned and maintained in accor dance with the manufacturer’s instructions after installation. Where nonwater urinals are installed, not less than one water…
412.2 Backflow Protection. A water supply to a urinal ¶
412.2 Backflow Protection. A water supply to a urinal shall be protected by an approved-type vacuum breaker or other approved backflow prevention device in accordance with Section 603.5.
413.0 Flushing Devices. ¶
413.1 Where Required. Each water closet, urinal, clinical ¶
413.1 Where Required. Each water closet, urinal, clinical sink, or other plumbing fixture that depends on trap siphonage to discharge its waste contents shall be provided with a flushometer valve, flushometer tank, or flush tank designed and installed so as to supply water in sufficient quantity and rate of flow to flush the contents of the fixture to which it is connected, to cleanse the fixture, and to refill the fixture trap, without excessive water use. Flushing devices shall comply with the antisiphon requirements in accordance with Section 603.5.
413.2 Flushometer Valves. Flushometer valves and ¶
413.2 Flushometer Valves. Flushometer valves and flushometer tanks shall comply with ASSE 1037/ASME A112.1037/CSA B125.37, and shall be installed in accordance with Section 603.5.1. No manually controlled flushometer valve shall be used to flush more than one urinal, and each such urinal flushometer valve shall be an approved, self-closing type discharging a predetermined quantity of water. Flushometers shall be installed so that they will be accessible for repair. Flushometer valves shall not be used where the water pressure is insufficient to operate them properly. Where the valve is…
413.3 Flush Tanks. Flush tanks for manual flushing shall ¶
413.3 Flush Tanks. Flush tanks for manual flushing shall be equipped with a flush valve that complies with ASME A112.19.5/CSA B45.15 and an antisiphon fill valve (ballcock) that complies with ASSE 1002/ASME A112.1002/CSA B125.12 and installed in accordance with Section 603.5.2.
413.4 Water Supply for Flush Tanks. ¶
413.4 Water Supply for Flush Tanks. An adequate quantity of water shall be provided to flush and clean the fixture served. The water supply for flushing tanks and flushometer tanks equipped for manual flushing shall be controlled by a float valve or other automatic device designed to refill the tank after each discharge and to shut completely off the water flow to the tank where the tank is filled to operational capacity. Provision shall be made to automatically supply water to the fixture to refill the trap seal after each flushing.
413.5 Overflows in Flush Tanks. ¶
413.5 Overflows in Flush Tanks. Flush tanks shall be provided with overflows discharging into the water closet or urinal connected thereto. Overflows supplied as original parts with the fixture shall be of sufficient size to prevent tank flooding at the maximum rate at which the tank is supplied with water under normal operating conditions and where installed in accordance with the manufacturer’s installation instructions.
414.0 Dishwashing Machines. ¶
414.1 Application. Domestic dishwashing machines shall ¶
414.1 Application. Domestic dishwashing machines shall comply with UL 749. Domestic dishwashing machines containing sanitation features shall comply with NSF/ANSI 184 and UL 749. Commercial dishwashing machines shall comply with NSF/ANSI 3 and UL 921.
414.2 Backflow Protection. The water supply connection ¶
414.2 Backflow Protection. The water supply connection to a commercial dishwashing machine shall be protected by an air gap or a backflow prevention device in accordance with Section 603.3.2, Section 603.3.5, Section 603.3.6, or that complies with ASSE 1004.
414.3 Drainage Connection. Domestic dishwashing ¶
414.3 Drainage Connection. Domestic dishwashing machines shall discharge indirectly through an air gap fitting in accordance with Section 807.3 into a waste receptor, a wye branch fitting on the tailpiece of a kitchen sink, or dishwasher connection of a food waste disposer. Commercial dishwashing machines shall discharge indirectly through an air break in accordance with Section 807.1, or by a direct connection in accordance with Section 704.3.
414.4 Lead Content. Dishwashing machines shall comply ¶
414.4 Lead Content. Dishwashing machines shall comply with the lead content requirements of Section 604.2.
415.0 Drinking Fountains. ¶
415.1 Application. Drinking fountains shall be self-closing ¶
415.1 Application. Drinking fountains shall be self-closing and comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, or ASME A112.19.3/CSA B45.4. Drinking fountains and bottle filling stations shall also comply with NSF/ANSI/CAN 61. Permanently installed electric water coolers and bottle filling stations shall also comply with UL 399. [HCD 1] Drinking fountains shall be installed and so regu- lated that a jet of water extending at least 2 inches (51 mm) in height from the water orifice shall be constantly available. The orifice shall not be accessible to the mouth of the drinker…
415.2 Drinking Fountain Alternatives. Where food is ¶
415.2 Drinking Fountain Alternatives. Where food is consumed indoors, water stations shall be permitted to be substituted for drinking fountains. Bottle filling stations shall be permitted to be substituted for drinking fountains up to 50 percent of the requirements for drinking fountains. Drinking fountains shall not be required for an occupant load of 30 or less.
415.3 Drainage Connection. Drinking fountains shall be ¶
415.3 Drainage Connection. Drinking fountains shall be permitted to discharge directly into the drainage system or indirectly through an air break in accordance with Section 809.1.
415.4 Location. Drinking fountains shall not be installed in ¶
415.4 Location. Drinking fountains shall not be installed in toilet rooms.
416.0 Emergency Eyewash and Shower Equipment. ¶
416.0 Emergency Eyewash and Shower Equipment.
416.1 Application. Emergency eyewash and shower equipment shall comply with ISEA Z358.1. ¶
416.1 Application. Emergency eyewash and shower equipment shall comply with ISEA Z358.1.
416.2 Water Supply. Emergency eyewash and shower ¶
416.2 Water Supply. Emergency eyewash and shower equipment shall not be limited in the water supply flow rates. Where hot and cold water is supplied to an emergency shower or eyewash station, the temperature of the water supply shall be controlled by a temperature actuated mixing valve complying with ASSE 1071. Where water is supplied directly to an emergency shower or eyewash station from a water heater, the water heater shall comply with ASSE 1085. The flow rate, discharge pattern, and temperature of flushing fluids shall be provided in accordance with ISEA Z358.1.
416.3 Installation. ¶
416.3 Installation. Emergency eyewash and shower equipment shall be installed in accordance with the manufacturer’s installation instructions.
416.4 Location. ¶
416.4 Location. Emergency eyewash and shower equipment shall be located on the same level as the hazard and accessible for immediate use. The path of travel shall be free of obstructions and shall be clearly identified with signage.
416.5 Drain. A drain shall not be required for emergency ¶
416.5 Drain. A drain shall not be required for emergency eyewash or shower equipment. Where a drain is provided, the discharge shall be in accordance with Section 811.0.
417.0 Faucets and Fixture Fittings. ¶
417.0 Faucets and Fixture Fittings.
417.1 Application. Faucets and fixture fittings shall comply ¶
417.1 Application. Faucets and fixture fittings shall comply with ASME A112.18.1/CSA B125.1. Fixture fittings covered under the scope of NSF/ANSI/CAN 61 shall comply with the requirements of NSF/ANSI/CAN 61. 417.1.1 Wash Fountains. [BSC-CG & DSA-SS] Wash fountains shall have a maximum flow rate of not more than 1.8 gallons (6.81 L) per minute/20 [rim space (inches) at 60 psi] in compliance with Chapter 5, Divi- sion 5.3 of the California Green Building Standards Code (CALGreen). 417.1.2 Metering Faucets for Wash Fountains. [BSC-CG & DSA-SS] Metering faucets for wash foun- tains shall have a…
417.2 Deck Mounted Bath/Shower Valves. Deck ¶
417.2 Deck Mounted Bath/Shower Valves. Deck mounted bath/shower transfer valves with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1. This shall include handheld showers, and other bathing appliances mounted on the deck of bathtubs or other bathing appliances that incorporate a hose or pull out feature.
417.3 Handheld Showers. Handheld showers shall comply ¶
417.3 Handheld Showers. Handheld showers shall comply with ASME A112.18.1/CSA B125.1. Handheld showers with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1 or shall have a backflow prevention device that complies with ASME A112.18.3 or ASSE 1014.
417.4 Faucets and Fixture Fittings with Hose Con- ¶
417.4 Faucets and Fixture Fittings with Hose Con- nected Outlets. Faucets and fixture fittings with pull out spout shall comply with ASME A112.18.1/CSA B125.1. Faucets and fixture fittings with pull out spouts with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1 or shall have a backflow preventer device that complies with ASME A112.18.3.
417.5 Separate Controls for Hot and Cold Water. ¶
417.5 Separate Controls for Hot and Cold Water. Where two separate handles control the hot and cold water, the left-hand control of the faucet where facing the fixture fitting outlet shall control the hot water. Faucets and diverters shall be connected to the water distribution system so that hot water corresponds to the left side of the fixture fitting. Single-handle mixing valves installed in showers and tub-shower combinations shall have the flow of hot water corresponding to the markings on the fixture fitting.
417.6 Low-Pressure Water Dispenser. Beverage faucets ¶
417.6 Low-Pressure Water Dispenser. Beverage faucets shall comply with ASME A112.18.1/CSA B125.1. Electrically heated or cooled water dispensers shall comply with ASSE 1023.
417.7 Head Shampoo Sink Faucets. Head shampoo sink ¶
417.7 Head Shampoo Sink Faucets. Head shampoo sink faucets shall be supplied with hot water that is limited to not more than 120°F (49°C). Each faucet shall have integral check valves to prevent crossover flow between the hot and cold water supply connections. The means for regulating the maximum temperature shall be in accordance with one of the following: (1) A limiting device conforming to ASSE 1070/ASME A112.1070/CSA B125.70. (2) A water heater conforming to ASSE 1084. (3) A temperature-actuated, flow-reduction device conforming to ASSE 1062.
417.8 Footbaths and Pedicure Baths. ¶
417.8 Footbaths and Pedicure Baths. The water supplied to specialty plumbing fixtures, such as pedicure chairs having an integral foot bathtub and footbaths, shall be limited to not more than 120ºF (49ºC) by a water-temperaturelimiting device that conforms to ASSE 1070/ASME A112.1070/CSA B125.70 or by a water heater complying with ASSE 1084.
418.0 Floor Drains. ¶
418.1 Application. Floor drains shall comply with ASME ¶
418.1 Application. Floor drains shall comply with ASME A112.3.1, ASME A112.6.3, or CSA B79.
418.2 Strainer. Floor drains shall be considered plumbing ¶
418.2 Strainer. Floor drains shall be considered plumbing fixtures and each such drain shall be provided with an approved-type strainer having a waterway equivalent to the area of the tailpiece. Floor drains shall be of an approved type and shall provide a watertight joint on the floor. 66 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS
418.3 Location of Floor Drains. Floor drains shall be ¶
418.3 Location of Floor Drains. Floor drains shall be installed in the following areas: (1) Toilet rooms containing two or more water closets or a combination of one water closet and one urinal, except in a dwelling unit. (2) Commercial kitchens and in accordance with Section 704.3. (3) Laundry rooms in commercial buildings and common laundry facilities in multi-family dwelling buildings. (4) Boiler rooms.
418.4 Food Storage Areas. Where drains are provided in ¶
418.4 Food Storage Areas. Where drains are provided in storerooms, walk-in freezers, walk-in coolers, refrigerated equipment, or other locations where food is stored, such drains shall have indirect waste piping. Separate waste pipes shall be run from each food storage area, each with an indirect connection to the building sanitary drainage system. Traps shall be provided in accordance with Section 801.3.2 of this code and shall be vented. Indirect drains shall be permitted to be located in freezers or other spaces where freezing temperatures are maintained, provided that traps, where…
418.5 Floor Slope. Floors shall be sloped to floor drains. ¶
418.5 Floor Slope. Floors shall be sloped to floor drains.
419.0 Food Waste Disposers. ¶
419.1 Application. Food waste disposal units shall comply ¶
419.1 Application. Food waste disposal units shall comply with UL 430. Residential food waste disposers shall also comply with ASSE 1008.
419.2 Drainage Connection. Approved wye or other ¶
419.2 Drainage Connection. Approved wye or other directional-type branch fittings shall be installed in continuous wastes connecting or receiving the discharge from a food waste disposer. No dishwasher drain shall be connected to a sink tailpiece, continuous waste, or trap on the discharge side of a food waste disposer.
419.3 Water Supply. A cold water supply shall be provided ¶
419.3 Water Supply. A cold water supply shall be provided for food waste disposers. Such connection to the water supply shall be protected by an air gap or backflow prevention device in accordance with Section 603.2.
420.0 Sinks. ¶
420.1 Application. Sinks shall comply with ASME ¶
420.1 Application. Sinks shall comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, CSA B45.5/IAPMO Z124, CSA B45.8/IAPMO Z403, or CSA B45.12/IAPMO Z402. Moveable sink systems shall comply with ASME A112.19.12. Sink assemblies with automatic soap dispensers, faucets, or hand dryers shall comply with IAPMO IGC 127.
420.2 Water Consumption. ¶
420.2 Water Consumption. Sink faucets shall have a maximum flow rate of not more than 2.2 gpm at 60 psi (8.3 L/m at 414 kPa). Exceptions: (1) Clinical sinks (2) Laundry sinks (3) Service sinks 420.2.1 Kitchen Faucets. [BSC-CG & DSA-SS] Kitchen faucets shall have a maximum flow rate of not more than 1.8 gallons (6.81 L) per minute at 60 psi (414 kPa). Kitchen faucets may temporarily increase the flow above the maximum rate, but not to exceed 2.2 gallons (8.3 L) per minute at 60 psi (414 kPa), and must default to a maximum flow rate of 1.8 gallons (6.81 L) per minute at 60 psi (414 kPa) in…
420.3 Pre-Rinse Spray Valve. Commercial food service ¶
420.3 Pre-Rinse Spray Valve. Commercial food service pre-rinse spray valves shall have a maximum flow rate in accordance with Table 420.3 and shall be equipped with an integral automatic shutoff. TABLE 420.3 COMMERCIAL PRE-RINSE SPRAY VALVE MAXIMUM FLOW RATE PRODUCT CLASS BY SPRAY FORCEMAXIMUM FLOW RATE,<brGPM ------ <brProduct Class 1 (≤ 5.0 ounces-force)1.00 <br <brProduct Class 2 ( 5.0 ounces-force and<br≤ 8.0 ounces-force)1.20 <brProduct Class 3 ( 8.0 ounces-force)1.28 For SI units: 1 gallon per minute = 3.785 L/min, 1 ounce-force = 0.278 N
420.4 Waste Outlet. Kitchen and laundry sinks shall have ¶
420.4 Waste Outlet. Kitchen and laundry sinks shall have a waste outlet and fixture tailpiece not less than 1 [1] ⁄ 2 inches (40 mm) in diameter. Service sinks shall have a waste outlet and fixture tailpiece not less than 2 inches (50 mm) in diameter. Fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping. Waste outlets shall be provided with an approved strainer.
421.0 Floor Sinks. ¶
421.1 Application. Floor sinks shall comply with ASME ¶
421.1 Application. Floor sinks shall comply with ASME A112.6.7.
421.2 Strainers. The waste outlet of a floor sink shall be ¶
421.2 Strainers. The waste outlet of a floor sink shall be provided with an approved strainer or grate that is removable and accessible.
422.0 Minimum Number of Required Fixtures. ¶
422.0 Minimum Number of Required Fixtures.
422.1 Fixture Count. Plumbing fixtures shall be provided ¶
422.1 Fixture Count. Plumbing fixtures shall be provided for the type of building occupancy and in the minimum number shown in Table 422.1. The total occupant load and occu TABLE 420.3 COMMERCIAL PRE-RINSE SPRAY VALVE MAXIMUM FLOW RATE For SI units: 1 gallon per minute = 3.785 L/min, 1 ounce-force = 0.278 N < ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS Exceptions [Not adopted for OSHPD 1, 2, 3, 4 & 5] : (1) Residential installations. (2) In occupancies with a total occupant load of…
422.3 Fixture Requirements for Special Occupancies. ¶
422.3 Fixture Requirements for Special Occupancies. Additional fixtures shall be permitted to be required where unusual environmental conditions or referenced activities are encountered. In food preparation areas, fixture requirements shall be permitted to be dictated by health codes. 422.3.1 [OSHPD 1, 2, 3, 4, 5 & 6] Separate toilet facil- ities shall be provided for the use of patients, staff per- sonnel and visitors. Exceptions: (1) For Primary Care Clinics where a facility contains no more than three examination and/or treatment rooms, the patient toilet shall be permitted to serve…
422.4 Toilet Facilities Serving Employees and Cus- ¶
422.4 Toilet Facilities Serving Employees and Cus- tomers. [Not adopted for OSHPD 1, 2, 3, 4 & 5] Each building or structure shall be provided with toilet facilities for employees and customers. Requirements for customers and employees shall be permitted to be met with a single set of restrooms accessible to both groups. Required toilet facilities for employees and customers located in shopping malls or centers shall be permitted to be met by providing a centrally located toilet facility accessible to several stores. The maximum travel distance from entry to any store to the toilet facility…
422.1 and 4-4. Each bathroom shall comply with Part 2, ¶
422.1 and 4-4. Each bathroom shall comply with Part 2, Chapter 11A and 11B of the California Building Code. 422.1.4 [OSHPD 1, 2, 3, 4 & 5] OSHPD facilities shall also comply with requirements of the California Building Code, Sections 1224, 1225, 1226, 1227 and 1228.
422.2 Separate Facilities. Separate toilet facilities shall ¶
422.2 Separate Facilities. Separate toilet facilities shall be provided for each sex. 68 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS 422.4.1 Access to Toilet Facilities. In multi-story buildings, accessibility to the required toilet facilities shall not exceed one vertical story. Access to the required toilet facilities for customers shall not pass through areas designated as for employee use only such as kitchens, food preparation areas, storage rooms,…
422.5 Toilet Facilities for Workers. Toilet facilities shall ¶
422.5 Toilet Facilities for Workers. Toilet facilities shall be provided and maintained in a sanitary condition for the use of workers during construction.
422.6 Water Closet Compartment. Public water closets ¶
422.6 Water Closet Compartment. Public water closets shall occupy a separate compartment with walls or partitions and a door enclosing the fixtures to ensure privacy. Partitions for water closets located in separate gender toilet or bathrooms shall comply with the Type B security requirements of IAPMO Z124.10. Partitions for water closets located in all gender toilet or bathrooms shall comply with the Type A security requirements of IAPMO Z124.10. Exceptions: (1) Water closet compartments shall not be required in a single-occupant toilet room having a lockable door. (2) Toilet rooms in day…
422.7 Urinal Partitions. Each urinal shall be separated with ¶
422.7 Urinal Partitions. Each urinal shall be separated with walls or partitions to provide privacy. The horizontal dimension between walls or partitions at each urinal shall comply with Section 402.5. Partitions for urinals shall comply with the Type C security requirements of IAPMO Z124.10. Walls or partitions shall extend from not less than 12 inches (305 mm) above the finished floor to not less than 60 inches (1524 mm) above the finished floor. Walls shall extend outward from the wall surface not less than 18 inches (457 mm). Urinals located in all gender toilet rooms shall be visually…
422.8 Cosmetology. [CA] Each school shall provide pub- ¶
422.8 Cosmetology. [CA] Each school shall provide pub- lic toilet rooms for each sex on the licensed premises in accor- dance with the California Plumbing Code, Table 422.1.
422.9 Cosmetology Establishments. [CA] Each estab- ¶
422.9 Cosmetology Establishments. [CA] Each estab- lishment where hairdressing services are performed shall pro- vide at least one public toilet room located on the premises in accordance with the California Plumbing Code, Table 422.1.
422.10 Commissaries Serving Mobile Food Prepara- ¶
422.10 Commissaries Serving Mobile Food Prepara- tion Units. [DPH] Commissaries serving mobile food preparation units shall have at least one hose bib. The hose bib shall be supplied with hot and cold water and be provided with a single spout, a backflow-preventer device and shall be located on the premises of the establishment.
422.11 Employee Lavatories in Food Establishments. ¶
422.11 Employee Lavatories in Food Establishments. [DPH] Employee lavatories installed in food establishments shall be equipped with an approved single spout capable of providing tempered (100ºF - 115ºF) (37.8ºC - 46.1ºC) run- ning water. Note: This requirement applies only to commissaries serving mobile food preparation units. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. PLUMBING FIXTURES AND FIXTURE FITTINGS TABLE 422.1 MINIMUM PLUMBING FACILITIES [1] Each building shall be provided with sanitary facilities, including…
422.1 for an occupancy group A2. ¶
422.1 for an occupancy group A2. 17 In a multiple-bed room, every bed position shall be within 20 feet (6 meters) of a hands-free handwashing fixture. Where an individual room concept is used, a handwashing fixture shall be provided within each infant care room. 18 When three or more procedure rooms are provided. 19 If a separate medicine room is provided, the room shall be equipped with a sink in addition to the nurses' station handwashing fixture. Hot-water supplies are optional. 20 Where the patient room can only be accessed through the ante room the handwash fixture may be omitted in the…
501.0 General. ¶
501.1 Applicability. ¶
501.1 Applicability. The regulations of this chapter shall govern the construction, location, and installation of fuel-burning and other types of water heaters heating potable water, together with chimneys, vents, and their connectors. The minimum capacity for storage water heaters shall be in accordance with the first-hour rating listed in Table 501.1(2). A list of accepted water heater appliance standards is referenced in Table 501.1(1). Listed appliances shall be installed in accordance with the manufacturer’s installation instructions. Unlisted water heaters shall be permitted in…
501.2 California Energy Code Water Heating System ¶
501.2 California Energy Code Water Heating System Requirements. [CEC] See California Energy Code Section
110.3 for additional mandatory requirements for all service ¶
110.3 for additional mandatory requirements for all service water heating systems, and 150.0(n) for additional mandatory requirements for residential service water heating systems.
502.0 Permits. ¶
502.1 General. It shall be unlawful for a person to install, ¶
502.1 General. It shall be unlawful for a person to install, remove, or replace or cause to be installed, removed, or replaced a water heater without first obtaining a permit from the Authority Having Jurisdiction to do so. TABLE 501.1(1) WATER HEATERS For SI units: 1000 British thermal units per hour = 0.293 kW - Dual purpose water heaters shall be installed in accordance with this code and the manufacturer’s installation instructions.
503.0 Inspection. ¶
503.1 Inspection of Chimneys or Vents. ¶
503.1 Inspection of Chimneys or Vents. This inspection shall be made after chimneys, vents, or parts thereof, authorized by the permit, have been installed and before such vent or part thereof has been covered or concealed.
503.2 Final Water Heater Inspection. This inspection ¶
503.2 Final Water Heater Inspection. This inspection shall be made after work authorized by the permit has been installed. The Authority Having Jurisdiction will make such inspection as deemed necessary to be assured that the work has been installed in accordance with the intent of this code. No appliance or part thereof shall be covered or concealed until the same has been inspected and approved by the Authority Having Jurisdiction.
504.0 Water Heater Requirements. ¶
504.1 Location. Water heater installations in bedrooms and ¶
504.1 Location. Water heater installations in bedrooms and bathrooms shall comply with one of the following [NFPA 54:10.27.1]: (1) Water heater shall be of the direct-vent type. [NFPA 54:10.27.1(2)] (2) Fuel-burning water heaters shall be permitted to be installed in a closet located in the bedroom or bathroom provided the closet is equipped with a listed, gasketed door assembly and a listed self-closing device. The selfclosing door assembly shall meet the requirements of Section 504.1.1. The door assembly shall be installed with a threshold and bottom door seal and shall meet the…
504.2 Vent. Water heaters of other than the direct-vent type ¶
504.2 Vent. Water heaters of other than the direct-vent type shall be located as close as practical to the chimney or gas vent.
504.3 Clearance. The clearance requirements for water ¶
504.3 Clearance. The clearance requirements for water heaters shall comply with Section 504.3.1 or Section 504.3.2. 504.3.1 Listed Water Heaters. The clearances shall not be such as to interfere with combustion air, draft hood clearance and relief, and accessibility for servicing. Listed water heaters shall be installed in accordance with their listings and the manufacturer’s installation instructions. 504.3.2 Unlisted Water Heaters. Except as otherwise permitted in this code, unlisted water heaters shall be approved by the Authority Having Jurisdiction prior to being installed. Clearance for…
504.4 Pressure-Limiting Devices. ¶
504.4 Pressure-Limiting Devices. A water heater installation shall be provided with overpressure protection using an approved, listed device installed in accordance with the terms of its listing and the manufacturer’s installation instructions. Pressure relief devices shall have a pressure setting greater than the water service pressure and not exceed 150 psi (1034 kPa) as required in Section 608.4.
504.5 Temperature Limiting Devices. A water heater ¶
504.5 Temperature Limiting Devices. A water heater installation or a hot water storage vessel installation shall be provided with overtemperature protection by means of an approved, listed device installed in accordance with the terms of its listing and the manufacturer’s installation instructions. {NFPA 54:10.26.5}
504.6 Temperature, Pressure, and Vacuum Relief ¶
504.6 Temperature, Pressure, and Vacuum Relief Devices. Temperature, pressure, and vacuum relief devices or combinations thereof, and automatic gas shutoff devices shall be installed in accordance with the terms of their listings and the manufacturer’s installation instructions. A shutoff valve shall not be placed between the relief valve and the water heater or on discharge pipes between such valves and the atmosphere. The hourly British thermal units (Btu) (kW•h) discharge capacity or the rated steam relief capacity of the device shall be not less than the input rating of the water heater.…
504.7 Lead Content. Water heaters shall comply with the ¶
504.7 Lead Content. Water heaters shall comply with the lead content requirements of Section 604.2.
505.0 Oil-Burning and Other Water Heaters. ¶
505.0 Oil-Burning and Other Water Heaters.
505.1 Water Heaters. Water heaters deriving heat from ¶
505.1 Water Heaters. Water heaters deriving heat from fuels or types of energy other than gas shall comply with the standards referenced in Table 501.1(1), Section 505.3, or Section 505.4. Vents or chimneys for such appliances shall be of approved types. An adequate supply of air for combustion and for adequate ventilation of heater rooms or compartments shall be provided. Each such appliance shall be installed in a location approved by the Authority Having Jurisdiction and local and state fire-prevention agencies.
505.2 Safety Devices. Storage-type water heaters and hot ¶
505.2 Safety Devices. Storage-type water heaters and hot water boilers deriving heat from fuels or types of energy other than gas, shall be provided with, in addition to the primary temperature controls, an over-temperature safety protection device that complies with and is installed in accordance with nationally recognized applicable standards for such devices and a combination temperature and pressure-relief valve.
505.3 Oil-Fired Water Heaters. Oil-fired water heaters ¶
505.3 Oil-Fired Water Heaters. Oil-fired water heaters shall be installed in accordance with NFPA 31.
505.4 Indirect-Fired Water Heaters. Indirect-fired water ¶
505.4 Indirect-Fired Water Heaters. Indirect-fired water heaters shall be in accordance with the applicable sections of the ASME Boiler and Pressure Vessel Code or shall comply with one of the other applicable standards shown in Table 501.1(1). Each water heater shall bear a label in accordance with ASME requirements, or an approved testing agency, certifying and attesting that such an appliance has been tested, inspected and meets the requirements of the applicable standards or code. 505.4.1 Single-Wall Heat Exchanger. An indirectfired water heater that incorporates a single-wall heat…
506.0 Air for Combustion and Ventilation. ¶
506.0 Air for Combustion and Ventilation.
506.1 General. ¶
506.1 General. Air for combustion, ventilation, and dilution of flue gases for appliances installed in buildings shall be obtained by application of one of the methods covered in Section 506.2 through Section 506.7.3. Where the requirements of Section 506.2 are not met, outdoor air shall be introduced in accordance with methods covered in Section 506.4 through Section 506.7.3. Exception: This provision shall not apply to direct vent appliances. {NFPA 54:9.3.1.1} 506.1.1 Other Types of Appliances. Appliances of other than natural draft design, appliances not designated as Category I vented…
506.2 Indoor Combustion Air. The required volume of ¶
506.2 Indoor Combustion Air. The required volume of indoor air shall be determined in accordance with the method in Section 506.2.1 or Section 506.2.2 except that where the air infiltration rate is known to be less than 0.40 ACH (air change per hour), the method in Section 506.2.2 shall be used. The total required volume shall be the sum of the required volume calculated for all appliances located within the space. Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors, and through combustion air openings sized and located…
506.3 Indoor Opening Size and Location. Openings ¶
506.3 Indoor Opening Size and Location. Openings used to connect indoor spaces shall be sized and located in accordance with the following: (1) Combining spaces on the same story. Each opening shall have a minimum free area of 1 square inch per 1000 Btu/h (0.002 m [2] /kW) of the total input rating of all appliances in the space but not less than 100 square inches (0.065 m [2] ). One permanent opening shall commence within 12 inches (305 mm) of the top of the enclosure and one permanent opening shall commence within 12 inches (305 mm) of the bottom of the enclosure (see Figure 506.3). The…
506.4 Outdoor Combustion Air. Outdoor combustion air ¶
506.4 Outdoor Combustion Air. Outdoor combustion air shall be provided through opening(s) to the outdoors in accordance with the methods in Section 506.4.1 or Section 506.4.2. The minimum dimension of air openings shall not be less than 3 inches (76 mm). [NFPA 54:9.3.3] 506.4.1 Two Permanent Openings Method. Two permanent openings, one commencing within 12 inches ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER HEATERS FIGURE 506.4.1(1) ALL COMBUSTION AIR FROM OUTDOORS – INLET AIR FROM VENTILATED CRAWL SPACE AND OUTLET…
506.5 Combination Indoor and Outdoor Combustion ¶
506.5 Combination Indoor and Outdoor Combustion Air. The use of a combination of indoor and outdoor com bustion air shall be in accordance with Section 506.5.1 through Section 506.5.3. [NFPA 54:9.3.4] (See Appendix J for example calculations) 506.5.1 Indoor Openings. Where used, openings connecting the interior spaces shall comply with Section 506.3. [NFPA 54:9.3.4(1)] 506.5.2 Outdoor Opening(s) Location. Outdoor opening(s) shall be located in accordance with Section 506.4. [NFPA 54:9.3.4(2)] 506.5.3 Outdoor Opening(s) Size. The outdoor opening(s) size shall be calculated in accordance with…
506.6 Engineered Installations. Engineered combustion ¶
506.6 Engineered Installations. Engineered combustion air installations shall provide an adequate supply of combustion, ventilation, and dilution air determined using engineering methods. [NFPA 54:9.3.5]
506.7 Mechanical Combustion Air Supply. Where all ¶
506.7 Mechanical Combustion Air Supply. Where all combustion air is provided by a mechanical air supply system, the combustion air shall be supplied from outdoors at the minimum rate of 0.35 cubic feet per minute per 1000 Btu/h [0.034 (m [3] /min)/kW] for all appliances located within the space. [NFPA 54:9.3.6] 506.7.1 Exhaust Fans. Where exhaust fans are installed, additional air shall be provided to replace the exhausted air. [NFPA 54:9.3.6.1] 506.7.2 Interlock. Each of the appliances served shall be interlocked to the mechanical air supply system to prevent main burner operation where the…
506.8 Louvers, Grilles, and Screens. The required size ¶
506.8 Louvers, Grilles, and Screens. The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area, and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position. [NFPA…
506.9 Combustion Air Ducts. Combustion air ducts shall ¶
506.9 Combustion Air Ducts. Combustion air ducts shall comply with the following [NFPA 54:9.3.8]: (1) Ducts shall be constructed of galvanized steel or a material having equivalent corrosion resistance, strength, and rigidity. Exception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one fireblock is removed. [NFPA 54:9.3.8.1] ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER HEATERS (2) Ducts shall terminate in an unobstructed…
507.0 Appliance and Equipment Installation Require- ¶
507.0 Appliance and Equipment Installation Require- ments.
507.1 Dielectric Insulator. ¶
507.1 Dielectric Insulator. The Authority Having Jurisdiction shall have the authority to require the use of an approved dielectric insulator on the water piping connections of water heaters and related water heating appliances.
507.2 Seismic Provisions. Water heaters shall be ¶
507.2 Seismic Provisions. Water heaters shall be anchored or strapped to resist horizontal displacement due to earthquake motion. Strapping shall be at points within the upper one-third ( [1] ∕ 3 ) and lower one-third ( [1] ∕ 3 ) of its vertical dimensions. At the lower point, minimum a distance of not less than four ( 4 ) inches (102 mm) shall be maintained above the controls with the strapping. Note: [HCD 1 & HCD 2] Reference Health and Safety Code Section 19211(a) which addresses new, replacement, and existing water heaters. Note: The applicable subsection of Health and Safety Code Sec-…
507.3 Appliance Support. Appliances and equipment shall ¶
507.3 Appliance Support. Appliances and equipment shall be furnished either with load distributing bases or with a suf ficient number of supports to prevent damage to either the building structure or the appliance and the equipment. [NFPA 54:9.1.8.1] 507.3.1 Structural Capacity. At the locations selected for installation of appliances and equipment, the dynamic and static load carrying capacities of the building structure shall be checked to determine whether they are adequate to carry the additional loads. The appliances and equipment shall be supported and shall be connected to the piping…
507.4 Ground Support. A water heater supported from the ¶
507.4 Ground Support. A water heater supported from the earth shall rest on level concrete or other approved base extending not less than 3 inches (76 mm) above the adjoining ground level.
507.5 Drainage Pan. Where a water heater is located in an ¶
507.5 Drainage Pan. Where a water heater is located in an attic, in or on an attic ceiling assembly, floor-ceiling assembly, floor-subfloor assembly or where damage results from a leaking water heater, a watertight pan of corrosion-resistant materials shall be installed beneath the water heater in accordance with the following: (1) The drainage pan shall be provided with not less than [3] ⁄ 4 of an inch (20 mm) diameter drain to an approved location. The terminating end of the drainpipe shall be readily visible. (2) The drainage pan shall be not less than 1 [1] ⁄ 2 inches (38 mm) in depth.…
507.6 Added or Converted Equipment or Appliances. ¶
507.6 Added or Converted Equipment or Appliances. When additional or replacement appliances or equipment is installed or an appliance is converted to gas from another fuel, the location in which the appliances or equipment is to be operated shall be checked to verify the following: (1) Air for combustion and ventilation is provided where required, in accordance with the provisions of Section 506.0. Where existing facilities are not adequate, they shall be upgraded to meet Section 506.0 specifications. (2) The installation components and appliances meet the clearances to combustible material…
507.7 Type of Gas(es). The appliance shall be connected to ¶
507.7 Type of Gas(es). The appliance shall be connected to the fuel gas for which it was designed. No attempt shall be made to convert the appliance from the gas specified on the rating plate for use with a different gas without consulting the installation instructions, the serving gas supplier, or the appliance manufacturer for complete instructions. Listed appliances shall 88 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER HEATERS not be converted unless permitted by and in accordance…
507.8 Safety Shutoff Devices for Unlisted LP-Gas ¶
507.8 Safety Shutoff Devices for Unlisted LP-Gas Appliance Used Indoors. Unlisted appliances for use with undiluted LP-Gases and installed indoors, except attended laboratory equipment, shall be equipped with safety shutoff devices of the complete shutoff type. [NFPA 54:9.1.4]
507.9 Use of Air or Oxygen Under Pressure. Where air ¶
507.9 Use of Air or Oxygen Under Pressure. Where air or oxygen under pressure is used in connection with the gas supply, effective means such as a backpressure regulator and relief valve shall be provided to prevent air or oxygen from passing back into the gas piping. Where oxygen is used, installation shall be in accordance with NFPA 51. [NFPA 54:9.1.5]
507.10 Protection of Gas Appliances from Fumes or ¶
507.10 Protection of Gas Appliances from Fumes or Gases other than Products of Combustion. Nondirect-vent appliances installed in beauty shops, barber shops, or other facilities where chemicals that generate corrosive or flammable products such as aerosol sprays are routinely used shall be located in a mechanical room separate or partitioned off from other areas with provisions for combustion and dilution air from outdoors. Direct-vent appliances in such facilities shall be in accordance with the appliance manufacturer’s installation instructions. [NFPA 54:9.1.6.2]
507.11 Process Air. ¶
507.11 Process Air. In addition to air needed for combustion in commercial or industrial processes, process air shall be provided as required for cooling of appliances, equipment, or material; for controlling dew point, heating, drying, oxidation, dilution, safety exhaust, odor control, and air for compressors; and for comfort and proper working conditions for personnel. [NFPA 54:9.1.7]
507.12 Flammable Vapors. Appliances shall not be ¶
507.12 Flammable Vapors. Appliances shall not be installed in areas where the open use, handling, or dispensing of flammable liquids occurs, unless the design, operation, or installation reduces the potential of ignition of the flammable vapors. Appliances installed in compliance with Section 507.13 through Section 507.15 shall be considered to comply with the intent of this provision. [NFPA 54:9.1.9]
507.13 Installation in Residential Garages. Appliances ¶
507.13 Installation in Residential Garages. Appliances in residential garages and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit shall be installed so that all heating elements, switches, burners, and burner-ignition devices are located not less than 18 inches (457 mm) above the floor. Exception: Listed flammable vapor ignition resistant (FVIR) appliances. {NFPA 54:9.1.10.1 } 507.13.1 Physical Damage. Appliances installed in garages, warehouses, or other areas subject to mechanical damage shall be guarded against such damage by being…
507.14 Installation in Commercial Garages. Appliances ¶
507.14 Installation in Commercial Garages. Appliances installed in commercial garages shall comply with Section 507.14.1 and Section 507.14.2. 507.14.1 Parking Structures. Appliances installed in enclosed, basement, and underground parking structures shall be installed in accordance with NFPA 88A. [NFPA 54:9.1.11.1] 507.14.2 Repair Garages. Appliances installed in repair garages shall be installed in accordance with NFPA 30A. [NFPA 54:9.1.11.2]
507.15 Installation in Aircraft Hangars. ¶
507.15 Installation in Aircraft Hangars. Heaters in aircraft hangars shall be installed in accordance with NFPA 409. [NFPA 54:9.1.12]
507.16 Venting of Flue Gases. Appliances shall be vented ¶
507.16 Venting of Flue Gases. Appliances shall be vented in accordance with the provisions of Section 509.0. [NFPA 54:9.1.14]
507.17 Extra Device or Attachment. ¶
507.17 Extra Device or Attachment. No device or attachment shall be installed on any appliance that could in any way impair the combustion of gas. [NFPA 54:9.1.15]
507.18 Addition to Existing System. When additional ¶
507.18 Addition to Existing System. When additional appliances are being connected to a gas piping system, the existing piping shall be checked to determine whether it has adequate capacity. If the capacity of the system is determined to be inadequate for the additional appliances, the existing system shall be enlarged as required, or separate gas piping of adequate capacity shall be provided. [NFPA 54:5.1.2]
507.19 Avoiding Strain on Gas Piping. Appliances shall ¶
507.19 Avoiding Strain on Gas Piping. Appliances shall be supported and connected to the piping so as not to exert undue strain on the connections. [NFPA 54:9.1.16]
507.20 Gas Appliance Pressure Regulators. Where the ¶
507.20 Gas Appliance Pressure Regulators. Where the gas supply pressure is higher than that at which the appliance is designed to operate or varies beyond the design pressure limits of the appliance, a gas appliance pressure regulator listed in accordance with CSA/ANSI Z21.18/CSA 6.3 shall be installed. [NFPA 54:9.1.17]
507.21 Bleed Lines for Diaphragm-Type Valves. Bleed ¶
507.21 Bleed Lines for Diaphragm-Type Valves. Bleed lines shall comply with the following requirements: (1) Diaphragm-type valves shall be equipped to convey bleed gas to the outdoors or into the combustion chamber adjacent to a continuous pilot. (2) In the case of bleed lines leading outdoors, means shall be employed to prevent water from entering this piping and also to prevent blockage of vents by insects and foreign matter. (3) Bleed lines shall not terminate in the appliance flue or exhaust system. (4) In the case of bleed lines entering the combustion chamber, the bleed line shall be…
508.2 Installation of Appliances on Roofs. Appliances ¶
508.2 Installation of Appliances on Roofs. Appliances shall be installed in accordance with the manufacturer’s installation instructions. [NFPA 54:9.4.2.1] 508.2.1 Edge of Roof Clearance. Appliances shall be installed on a well-drained surface of the roof. At least 6 feet (1829 mm) of clearance shall be available between any part of the appliance and the edge of a roof or similar hazard, or rigidly fixed rails, guards, parapets, or other building structures at least 42 inches (1067 mm) in height shall be provided on the exposed side. [NFPA 54:9.4.2.2] 508.2.1.1 Guards and Rails. Guards or…
508.3 Appliances on Roofs. Appliances located on roofs or ¶
508.3 Appliances on Roofs. Appliances located on roofs or other elevated locations shall be accessible. [NFPA 54:9.4.3.1] 508.3.1 Access. Buildings of more than 15 feet (4572 mm) in height shall have an inside means of access to the roof, unless other means acceptable to the Authority Having Jurisdiction are used. [NFPA 54:9.4.3.2] 508.3.2 Access Type. The inside means of access shall be a permanent or foldaway inside stairway or ladder, terminating in an enclosure, scuttle, or trapdoor. Such scuttles or trapdoors shall be at least 22 inches by 24 inches (559 mm by 610 mm) in size, shall open…
507.22 Combination of Appliances and Equipment. ¶
507.22 Combination of Appliances and Equipment. Any combination of appliances, equipment, attachments, or devices used together in any manner shall comply with the standards that apply to the individual appliance and equipment. [NFPA 54:9.1.19]
507.23 Installation Instructions. ¶
507.23 Installation Instructions. The installer shall conform to the appliance and equipment manufacturers’ recommendations in completing an installation. The installer shall leave the manufacturers’ installation, operating, and maintenance instructions on the premises. [NFPA 54:9.1.20]
507.24 Protection of Outdoor Appliances. Appliances ¶
507.24 Protection of Outdoor Appliances. Appliances not listed for outdoor installation but installed outdoors shall be provided with protection to the degree that the environment requires. Appliances listed for outdoor installation shall be permitted to be installed without protection in accordance with the manufacturer’s installation instructions. [NFPA 54:9.1.21]
507.25 Accessibility for Service. All appliances shall be ¶
507.25 Accessibility for Service. All appliances shall be located with respect to building construction and other equipment so as to permit access for repair or replacement of the appliance. Clearance shall be maintained to permit removal of the appliance; cleaning of heating surfaces; the replacement of filters, blowers, motors, burners, controls, and vent connections; the lubrication of moving parts where necessary; the adjustment and cleaning of burners and pilots; and the proper functioning of explosion vents, if provided. For attic installation, the passageway and servicing area adjacent…
507.26 Clearance to Combustible Materials. ¶
507.26 Clearance to Combustible Materials. Appliances and their vent connectors shall be installed with clearances from combustible material so their operation does not create a hazard to persons or property. Minimum clearances between combustible walls and the back and sides of various conventional types of appliances and their vent connectors are specified in Section 509.0. [NFPA 54:9.2.2]
508.0 Appliances on Roofs, in Attics or Under-Floor ¶
508.0 Appliances on Roofs, in Attics or Under-Floor Spaces.
508.1 General. Appliances on roofs shall be designed or ¶
508.1 General. Appliances on roofs shall be designed or enclosed so as to withstand climatic conditions in the area in which they are installed. Where enclosures are provided, each enclosure shall permit easy entry and movement, shall be of reasonable height, and shall have at least a 30 inch (762 mm) clearance between the entire service access panel(s) of the appliance, and the wall of the enclosure. [NFPA 54:9.4.1.1] 508.1.1 Load Capacity. Roofs on which appliances are to be installed shall be capable of supporting the additional load or shall be reinforced to support the additional load.…
508.4 Appliances in Attics and Under-Floor Spaces. ¶
508.4 Appliances in Attics and Under-Floor Spaces. An attic or under-floor space in which an appliance is installed shall be accessible through an opening and passageway larger than the largest component of the appliance, and not less than 22 inches by 30 inches (559 mm by 762 mm). {NFPA 54:9.5.1} 508.4.1 Length of Passageway. Where the height of the passageway is less than 6 feet (1829 mm), the distance from the passageway access to the appliance shall not exceed 20 feet (6096 mm) measured along the centerline of the passageway. [NFPA 54:9.5.1.1] Where the height of the passageway is 6 feet…
509.0 Venting of Appliances. ¶
509.1 Listing. Type B and Type B-W gas vents shall comply ¶
509.1 Listing. Type B and Type B-W gas vents shall comply with UL 441, and Type L gas vents shall comply with UL 641. 509.1.1 Installation. Listed chimneys and vents shall be installed in accordance with Section 509.0 and the manufacturers’ installation instructions. [NFPA 54:12.2.1] 509.1.2 Prohibited Discharge. Appliance vents shall not discharge into a space enclosed by screens having openings less than [1] ⁄ 4 of an inch (6.4 mm) mesh.
509.2 Connection to Venting Systems. ¶
509.2 Connection to Venting Systems. Except as permitted in Section 509.2.1 through Section 509.2.7, all appliances shall be connected to venting systems. [NFPA 54:12.3.1] 509.2.1 Appliances Not Required to be Vented. The following appliances shall not be required to be vented: (1) A single listed booster-type (automatic instantaneous) water heater, when designed and used solely for the sanitizing rinse requirements of a dishwashing machine, provided that the appliance is installed with the draft hood in place and unaltered, if a draft hood is required, in a commercial kitchen having a…
509.3 Minimum Safe Performance. Venting systems ¶
509.3 Minimum Safe Performance. Venting systems shall be designed and constructed to convey all flue and vent gases to the outdoors. [NFPA 54:12.1] 509.3.1 Appliance Draft Requirements. A venting system shall satisfy the draft requirements of the appliance in accordance with the manufacturer’s instructions. [NFPA 54:12.4.1] 509.3.2 Appliance Venting Requirements. Appliances required to be vented shall be connected to a venting system designed and installed in accordance with the provisions of Section 509.4 through Section 509.15. [NFPA 54:12.4.2] 509.3.3 Mechanical Draft Systems. Mechanical…
509.4 Type of Venting System to be Used. The type of ¶
509.4 Type of Venting System to be Used. The type of venting system to be used shall be in accordance with Table 509.4. [NFPA 54:12.5.1] 509.4.1 Plastic Piping. Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such venting materials and the appliance manufac turer’s installation instructions shall identify the specific plastic piping material. The plastic pipe venting materials shall be labeled in accordance with the product standards specified by the appliance manufacturer or shall be listed and labeled in accordance with UL 1738. [NFPA 54:12.5.2]…
509.5 Masonry, Metal, and Factory-Built Chimneys. ¶
509.5 Masonry, Metal, and Factory-Built Chimneys. Chimneys shall be installed in accordance with Section 509.5.1 through Section 509.5.3. 509.5.1 Factory-Built Chimneys. Factory-built chimneys shall be listed in accordance with UL 103, UL 959, or UL 2561. Factory-built chimneys used to vent appliances that operate at positive vent pressure shall be listed for such application. [NFPA 54:12.6.1.1] 509.5.1.1 Decorative Shrouds. Decorative shrouds addressed in Section 509.5.4.3 shall comply with UL 103 for factory -built residential chim neys. 509.5.2 Metal Chimneys. Metal chimneys shall be built…
509.6 Gas Vents. The installation of gas vents shall meet ¶
509.6 Gas Vents. The installation of gas vents shall meet the following requirements: (1) Gas vents shall be installed in accordance with the manufacturer’s installation instructions. (2) A Type B-W gas vent shall have a listed capacity not less than that of the listed vented wall furnace to which it is connected. (3) Gas vents installed within masonry chimneys shall be installed in accordance with the manufacturer’s installation instructions. Gas vents installed within masonry 94 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed…
509.7 Single-Wall Metal Pipe. Single-wall metal pipe ¶
509.7 Single-Wall Metal Pipe. Single-wall metal pipe shall be constructed of galvanized sheet steel not less than 0.0304 of an inch (0.7722 mm) thick or of other approved, noncombustible, corrosion-resistant material. [NFPA 54:12.8.1] 509.7.1 Cold Climate. Uninsulated single-wall metal pipe shall not be used outdoors for venting appliances in regions where the 99 percent winter design temperature is below 32°F (0°C). [NFPA 54:12.8.2] 509.7.2 Termination. The termination of single-wall metal pipe shall meet the following requirements: (1) Single-wall metal pipe shall terminate at least 5 feet…
509.9 Condensation Drain. Provision shall be made to ¶
509.9 Condensation Drain. Provision shall be made to collect and dispose of condensate from venting systems serving Category II and Category IV appliances and noncategorized condensing appliances. [NFPA 54:12.10.1] 509.9.1 Installation. Drains for condensate shall be installed in accordance with the appliance and vent manufacturers’ installation instructions. [NFPA 54:12.10.2]
509.10 Vent Connectors for Category I Appliances. ¶
509.10 Vent Connectors for Category I Appliances. A vent connector shall be used to connect an appliance to a gas vent, chimney, or single-wall metal pipe, except where the gas vent, chimney, or single-wall metal pipe is directly connected to the appliance. [NFPA 54:12.11.1] (2) Where a single-wall metal pipe is used and has a shape other than round, it shall have an equivalent effective area equal to the effective area of the round pipe for which it is substituted and the minimum internal dimension of the pipe shall be 2 inches (50 mm). (3) The vent cap or a roof assembly shall have a…
509.8 Through-the-Wall Vent Termination. ¶
509.8 Through-the-Wall Vent Termination. Throughthe-wall vent termination shall be in accordance with Section 509.8.1 through Section 509.8.3. 509.8.1 Clearance for Through-the-Wall Vent Ter- mination. The clearance for through-the-wall direct and non-direct vent terminals shall be in accordance with Table 509.8.1 and Figure 509.8.1. Exception: The clearances in Table 509.8.1 shall not apply to the combustion air intake of a direct vent appliance. [NFPA 54:12.9.1] » FIGURE 509.8.1 EXIT TERMINALS OF MECHANICAL DRAFT AND DIRECT-VENT VENTING SYSTEMS [NFPA 54: FIGURE 12.9.1] 100 2025 CALIFORNIA…
509.13 Manually Operated Dampers. ¶
509.13 Manually Operated Dampers. A manually operated damper shall not be placed in any appliance vent connector. Fixed baffles and balancing baffles shall not be classified as manually operated dampers. Balancing baffles shall be mechanically locked in the desired position before placing the appliance in service. Balancing baffles shall be listed in accordance with UL 378. [NFPA 54:12.14.1 – 12.14.3]
509.14 Automatically Operated Vent Dampers. An ¶
509.14 Automatically Operated Vent Dampers. An automatically operated vent damper shall be listed. [NFPA 54:12.15] 509.14.1 Listing. Automatically operated vent dampers for oil fired appliances shall comply with UL 17. The automatic damper control shall comply with UL 378.
509.15 Obstructions. Devices that retard the flow of vent ¶
509.15 Obstructions. Devices that retard the flow of vent gases shall not be installed in a vent connector, chimney, or vent. The following shall not be considered as obstructions: (1) Draft regulators and safety controls specifically listed for installation in venting systems and installed in accordance with the manufacturer’s installation instructions. (2) Approved draft regulators and safety controls designed and installed in accordance with engineering methods. (3) Listed heat reclaimers and automatically operated vent dampers installed in accordance with the manufacturers’ installation…
510.0 Sizing of Category I Venting Systems. ¶
510.0 Sizing of Category I Venting Systems.
510.1 Additional Requirements to Single Appliance ¶
510.1 Additional Requirements to Single Appliance Vent. Venting Table 510.1.2(1) through Table 510.1.2(6) shall not be used where obstructions are installed in the venting system. The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer’s instructions or in accordance with the following: » B gas vents that pass through walls or partitions constructed of combustible material shall be installed with not less than the listed clearance to combustible material. (2) Vent connectors shall be permitted to pass through ceilings,…
509.11 Vent Connectors for Category II, Category III, ¶
509.11 Vent Connectors for Category II, Category III, and Category IV Appliances. The vent connectors for Category II, Category III, and Category IV appliances shall be in accordance with Section 509.4 through Section 509.4.3. [NFPA 54:12.12]
509.12 Appliances Requiring Draft Hoods. Vented ¶
509.12 Appliances Requiring Draft Hoods. Vented appliances shall be installed with draft hoods. Exception: Dual oven-type combination ranges; direct vent appliances; fan-assisted combustion system appliances; appliances requiring chimney draft for operation; single-firebox boilers equipped with conversion burners with inputs greater than 400 000 Btu/h (117 kW); appliances equipped with blast, power, or pressure burners that are not listed for use with draft hoods; and appliances designed for forced venting. [NFPA 54:12.13.1] 509.12.1 Installation. A draft hood supplied with or forming a part…
510.2 Additional Requirements to Multiple-Appliance ¶
510.2 Additional Requirements to Multiple-Appliance Vent. Venting Table 510.2(1) through Table 510.2(9) shall not be used where obstructions are installed in the venting system. The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer’s instructions, or in accordance with the following: (1) The maximum capacity of the vent connector shall be determined using the NAT Max column. (2) The maximum capacity of the vertical vent or chimney shall be determined using the FAN + NAT column when the second appliance is a fan-assisted…
601.0 General. ¶
601.1 Applicability. This chapter shall govern the materials, ¶
601.1 Applicability. This chapter shall govern the materials, design, and installation of water supply systems, including methods and devices used for backflow prevention.
601.2 Water Supply and Flushing. ¶
601.2 Water Supply and Flushing. Each plumbing fixture shall be provided with an adequate supply of potable running water piped thereto in an approved manner, so arranged as to flush and keep it in a clean and sanitary condition without danger of backflow or cross-connection. Water closets and urinals shall be flushed using an approved flush tank or flushometer valve. Exceptions: (1) Listed fixtures that do not require water for their operation and are not connected to the water supply. (2) Where not deemed necessary for safety and sanitation by the Authority Having Jurisdiction. (3) [HCD 1 &…
601.3 Identification of a Potable and Nonpotable ¶
601.3 Identification of a Potable and Nonpotable Water System. In buildings where potable water and nonpotable water systems are installed, each system shall be clearly identified in accordance with Section 601.3.1 through Section 601.3.5. 601.3.1 Potable Water. Green background with white lettering. 601.3.2 Color and Information. Each system shall be identified with a colored pipe or band and coded with paints, wraps, and materials compatible with the piping. Except as required by Section 601.3.3, nonpotable water systems shall have a yellow background with black uppercase lettering, with…
601.4 Schools of Cosmetology and Cosmetological ¶
601.4 Schools of Cosmetology and Cosmetological Establishments. [CA] 601.4.1 Hot- and Cold-Running Water. At least one sink with hot-and cold-running water shall be provided in each work area or workroom where hairdressing is performed in each school and establishment. 601.4.2 Handwashing Facilities. Each school and establishment shall provide adequate handwashing facil- ities, including hot-and cold-running water, located within or adjacent to the toilet room or rooms in accor- dance with Table 422.1. 601.4.3 Drinking Water. Each school and establishment shall supply potable drinking water…
601.5 Meat and Poultry Processing Plants. [AGR] ¶
601.5 Meat and Poultry Processing Plants. [AGR] Except as provided in Section 601.5.4, the water supply shall be ample and potable, with adequate pressure and facilities for its distribution in the plant, and its protection against con- tamination and pollution. Note: A water report, issued under the authority of the state health agency, certifying to the potability of the water supply, shall be obtained by the applicant and furnished to the admin- istrator whenever such report is required by the administrator. 601.5.1 A supply of hot water shall be available. 601.5.2 Hose connections with…
601.6 Collection Centers and Facilities. [AGR] ¶
601.6 Collection Centers and Facilities. [AGR] 601.6.1 The water supply shall be ample with facilities for its distribution. An ample supply of water at not less than 180°F (82°C), or other suitable method. 601.6.2 The vehicle cleaning and sanitizing area shall be provided with adequate line steam, producing a temper- ature of at least 180°F (82°C), or other suitable method. 601.6.3 Hose connections with steam and water-mixing valves of hot-and cold-water hose connections shall be provided at locations throughout the building and at unloading and vehicle cleaning slabs.
601.7 Renderers. [AGR] This area shall be provided with ¶
601.7 Renderers. [AGR] This area shall be provided with live steam or other method of sanitizing vehicles.
601.8 Horse Meat and Pet Food Establishments. [AGR] ¶
601.8 Horse Meat and Pet Food Establishments. [AGR] 601.8.1 The water supply shall be ample, clean and potable, with facilities for its distribution in the plant, and its protection against contamination and pollution. 601.8.1.1 Equipment using potable water shall be so installed as to prevent back-siphonage into the potable water system. 601.8.1.2 Non-potable water is permitted only in those parts of o ffi cial plants where no edible product is han- dled or prepared, and then only for limited purposes, such as on ammonia condensers not connected with the potable water supply, in vapor lines…
602.0 Unlawful Connections. ¶
602.1 Prohibited Installation. No installation of potable ¶
602.1 Prohibited Installation. No installation of potable water supply piping, or part thereof, shall be made in such a manner that it will be possible for used, unclean, polluted, or contaminated water, mixtures, or substances to enter a portion of such piping from a tank, receptor, equipment, or plumbing fixture by reason of backsiphonage, suction, or other cause, either during normal use and operation thereof, or where such tank, receptor, equipment, or plumbing fixture is flooded or subject to pressure exceeding the operating pressure in the hot or cold water piping.
602.2 Cross-Contamination. ¶
602.2 Cross-Contamination. No person shall make a connection or allow one to exist between pipes or conduits carrying domestic water supplied by a public or private building supply system, and pipes, conduits, or fixtures containing or carrying water from any other source or containing or carrying water that has been used for any purpose whatsoever, or piping carrying chemicals, liquids, gases, or substances whatsoever, unless there is provided a backflow prevention device approved for the potential hazard and maintained in accordance with this code. Each point of use shall be separately…
602.3 Backflow Prevention. No plumbing fixture, device, ¶
602.3 Backflow Prevention. No plumbing fixture, device, or construction shall be installed or maintained, or shall be connected to a domestic water supply, where such installation or connection provides a possibility of polluting such water supply or cross-connection between a distributing system of water for drinking and domestic purposes and water that becomes contaminated by such plumbing fixture, device, or construction unless there is provided a backflow prevention device approved for the potential hazard.
602.4 Approval by Authority. No water piping supplied ¶
602.4 Approval by Authority. No water piping supplied by a private water supply system shall be connected to any other source of supply without the approval of the Authority Having Jurisdiction, Health Department, or other department having jurisdiction.
603.0 Cross-Connection Control. ¶
603.1 General. Cross-connection control shall be provided ¶
603.1 General. Cross-connection control shall be provided in accordance with the provisions of this chapter. No person shall install a water-operated equipment or mechanism, or use a water-treating chemical or substance, where it is found that such equipment, mechanism, chemical, or substance causes pollution or contamination of the domestic water supply. Such equipment or mechanism shall be permitted where equipped with an approved backflow prevention device or assembly.
603.2 Approval of Devices or Assemblies. Before a ¶
603.2 Approval of Devices or Assemblies. Before a device or an assembly is installed for the prevention of backflow, it shall have first been approved by the Authority Having Jurisdiction. Devices or assemblies shall be tested in accordance with recognized standards or other standards acceptable to the Authority Having Jurisdiction. Backflow prevention devices and assemblies shall comply with Table 603.2, except for specific applications and provisions as stated in Section 603.5.1 through Section 603.5.22. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to…
603.3 Backflow Prevention Devices, Assemblies, and ¶
603.3 Backflow Prevention Devices, Assemblies, and Methods. Backflow prevention devices, assemblies, and methods shall comply with Section 603.3.1 through Section 603.3.12. 603.3.1 Air Gap. The minimum air gap to afford backflow protection shall be in accordance with Table 603.3.1. 603.3.2 Atmospheric Vacuum Breaker (AVB). An atmospheric vacuum breaker consists of a body, a checking member, and an atmospheric port. 603.3.3 Hose Connection Backflow Preventer. A hose connection backflow preventer consists of two independent check valves with an independent atmospheric vent between and a means…
603.4 General Requirements. Assemblies shall comply ¶
603.4 General Requirements. Assemblies shall comply with listed standards and be acceptable to the Authority Having Jurisdiction, with jurisdiction over the selection and installation of backflow prevention assemblies. 603.4.1 Backflow Prevention Valve. Where more than one backflow prevention valve is installed on a single premise, and the valves are installed in one location, each separate valve shall be permanently identified by the permittee in a manner satisfactory to the Authority Having Jurisdiction. 603.4.2 Testing. The premise owner or responsible person shall have the backflow…
603.5 Specific Requirements. Specific requirements for ¶
603.5 Specific Requirements. Specific requirements for backflow prevention shall comply with Section 603.5.1 through Section 603.5.22. 603.5.1 Atmospheric Vacuum Breaker. Water closet and urinal flushometer valves shall be protected against backflow by an approved backflow prevention assembly, device, or method. Where the valves are equipped with an atmospheric vacuum breaker, the vacuum breaker shall be installed on the discharge side of the flushometer valve with the critical level not less than 6 inches (152 mm), or the distance according to its listing, above the overflow rim of a water…
604.0 Materials. ¶
604.1 Pipe, Tube, and Fittings. ¶
604.1 Pipe, Tube, and Fittings. Pipe, tube, fittings, solvent cement, thread sealants, solders, and flux used in potable water systems intended to supply drinking water shall comply with NSF/ANSI/CAN 61. Where pipe fittings and valves are made from copper alloys containing more than 15 percent zinc by weight and are used in plastic piping systems, they shall be resistant to dezincification and stress corrosion cracking in compliance with NSF/ANSI 14. Materials used in the water supply system, except valves and similar devices, shall be of a like material, except where otherwise approved by…
604.2 Lead Content. The maximum allowable lead content ¶
604.2 Lead Content. The maximum allowable lead content in pipes, pipe fittings, plumbing fittings, and fixtures intended to convey or dispense water for human consumption shall be not more than a weighted average of 0.25 percent with respect to the wetted surfaces of pipes, pipe fittings, plumbing fittings, and fixtures. For solder and flux, the lead content shall be not more than 0.2 percent where used in piping systems that convey or dispense water for human consumption. Note: See Sections 116875 and 116876 of the Health and Safety Code for the maximum lead content of pipes, pipe or…
604.3 Copper or Copper Alloy Tube. Copper or copper ¶
604.3 Copper or Copper Alloy Tube. Copper or copper alloy tube for water piping shall have a weight of not less than Type L. Exception: Type M copper or copper alloy tubing shall be permitted to be used for water piping where piping is aboveground in, or on, a building or underground outside of struc tures.
604.4 Hard-Drawn Copper or Copper Alloy Tubing. ¶
604.4 Hard-Drawn Copper or Copper Alloy Tubing. Hard-drawn copper or copper alloy tubing for water supply and distribution in addition to the required incised marking shall be marked in accordance with ASTM B88. The colors shall be: Type K, green; Type L, blue; and Type M, red.
604.5 Flexible Connectors. Flexible water connectors ¶
604.5 Flexible Connectors. Flexible water connectors shall be installed in accessible locations, and where under continuous pressure shall comply with ASME A112.18.6/CSA B125.6. Flexible water connectors with an excess flow shut off device shall comply with CSA B125.5/IAPMO Z600.
604.6 Cast-Iron Fittings. Cast-iron fittings up to and ¶
604.6 Cast-Iron Fittings. Cast-iron fittings up to and including 2 inches (50 mm) in size, where used in connection with potable water piping, shall be galvanized.
604.7 Malleable Iron Fittings. Malleable iron water fittings shall be galvanized. ¶
604.7 Malleable Iron Fittings. Malleable iron water fittings shall be galvanized.
604.8 Previously Used Piping and Tubing. Piping and ¶
604.8 Previously Used Piping and Tubing. Piping and tubing that has previously been used for a purpose other than for potable water systems shall not be used.
604.9 Epoxy Coating. ¶
604.9 Epoxy Coating. The epoxy coating used on existing, underground steel building supply piping shall comply with NSF/ANSI/CAN 61 and AWWA C210.
604.10 Plastic Materials. Approved plastic materials shall ¶
604.10 Plastic Materials. Approved plastic materials shall be permitted to be used in building supply piping, provided that where metal building supply piping is used for electrical grounding purposes, replacement piping, therefore, shall be of like materials. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION TABLE 604.1 MATERIALS FOR BUILDING SUPPLY AND WATER DISTRIBUTION PIPING AND FITTINGS MATERIALBUILDING SUPPLY<brPIPE AND FITTINGSWATER<brDISTRIBUTION PIPE<brAND…
604.11 Solder. Solder shall comply with the requirements of ¶
604.11 Solder. Solder shall comply with the requirements of Section 604.2.
604.12 Flexible Corrugated Connectors. ¶
604.12 Flexible Corrugated Connectors. Flexible corrugated connectors of copper, copper alloy, or stainless steel shall be limited to the following connector lengths: (1) Fixture Connectors – 30 inches (762 mm) (2) Washing Machine Connectors – 72 inches (1829 mm) (3) Dishwasher and Icemaker Connectors – 120 inches (3048 mm)
604.13 Water Heater Connectors. ¶
604.13 Water Heater Connectors. Flexible metallic (copper and stainless steel), reinforced flexible, braided stainless steel, or polymer braided with EPDM core connectors that connect a water heater to the piping system shall comply with ASME A112.18.6/CSA B125.6. Copper, copper alloy, or stainless steel flexible connectors shall not exceed 24 inches (610 mm). PEX, PEX-AL-PEX, PE-AL-PE, or PE-RT tubing shall not be installed within the first 18 inches (457 mm) of piping connected to a water heater. [BSC, HCD 1 & HCD 2] PEX-AL-PEX is not adopted for use in potable water supply and distribution…
605.0 Joints and Connections. ¶
605.1 Copper or Copper Alloy Pipe, Tubing, and ¶
605.1 Copper or Copper Alloy Pipe, Tubing, and Joints. Joining methods for copper or copper alloy pipe, tubing, and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.1.1 through Section 605.1.5. 605.1.1 Brazed Joints. Brazed joints between copper or copper alloy pipe or tubing and fittings shall be made with brazing alloys having a liquid temperature above 1000°F (538°C). The joint surfaces to be brazed shall be cleaned bright by either manual or mechanical means. Tubing shall be cut square and reamed to full inside…
605.2 CPVC Plastic Pipe and Joints. CPVC plastic pipe ¶
605.2 CPVC Plastic Pipe and Joints. CPVC plastic pipe and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.2.1 through Section 605.2.3. 605.2.1 Mechanical Joints. Mechanical joints shall include compression, flanged, grooved and push fit fittings. 605.2.1.1 Push Fit Fittings. Removable and nonremovable push fit fittings that employ a quick assembly push fit connector shall comply with ASSE 1061. 605.2.2 Solvent Cement Joints. Solvent cement joints for CPVC pipe and fittings shall be clean from dirt and…
605.3 CPVC/AL/CPVC Plastic Pipe and Joints. ¶
605.3 CPVC/AL/CPVC Plastic Pipe and Joints. Chlorinated polyvinyl chloride/aluminum/chlorinated polyvinyl chloride (CPVC/AL/CPVC) plastic pipe and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.3.1 or Section 605.3.2. 605.3.1 Solvent Cement Joints. Solvent cement joints for CPVC/AL/CPVC pipe and fittings shall be clean from dirt and moisture. Solvent cements that comply with ASTM F493, requiring the use of a primer shall be orange in color. The primer shall be colored and shall comply with ASTM F656.…
605.4 Ductile Iron Pipe and Joints. Ductile iron pipe ¶
605.4 Ductile Iron Pipe and Joints. Ductile iron pipe and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.4.1 or Section 605.4.2. 605.4.1 Mechanical Joints. Mechanical joints for ductile iron pipe and fittings shall consist of a bell that is cast integrally with the pipe or fitting and provided with an exterior flange having bolt holes and a socket with annular recesses for the sealing gasket and the plain end of the pipe or fitting. The elastomeric gasket shall comply with AWWA C111. Lubricant…
605.5 Galvanized Steel Pipe and Joints. Galvanized ¶
605.5 Galvanized Steel Pipe and Joints. Galvanized steel pipe and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.5.1 or Section 605.5.2. 605.5.1 Mechanical Joints. Mechanical joints shall be made with an approved and listed elastomeric gasket. 605.5.2 Threaded Joints. Threaded joints shall be made with pipe threads that comply with ASME B1.20.1. Thread sealant tape or compound shall be applied only on male threads, and such material shall be of approved types, insoluble in water, and nontoxic.
605.6 PE Plastic Pipe/Tubing and Joints. PE plastic ¶
605.6 PE Plastic Pipe/Tubing and Joints. PE plastic pipe or tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.6.1 or Section 605.6.2. 605.6.1 Heat-Fusion Joints. Heat-fusion joints between PE pipe or tubing and fittings shall be assembled in accordance with Section 605.6.1.1 through Section 605.6.1.3 using butt, socket, or electro-fusion heat methods. 605.6.1.1 Butt-Fusion Joints. Butt-fusion joints shall be made in accordance with ASTM F2620. Joints shall be made by heating the squared ends…
605.7 PE-AL-PE Plastic Pipe/Tubing and Joints. ¶
605.7 PE-AL-PE Plastic Pipe/Tubing and Joints. PEAL-PE plastic pipe or tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.7.1 and Section 605.7.1.1. 605.7.1 Mechanical Joints. Mechanical joints for PEAL-PE pipe or tubing and fittings shall be either of the metal insert fittings with a split ring and compression nut or metal insert fittings with copper crimp rings. Metal insert fittings shall comply with ASTM F1974. Crimp insert fittings shall be joined to the pipe by placing the copper crimp…
605.8 PE-RT. Polyethylene of raised temperature (PE-RT) ¶
605.8 PE-RT. Polyethylene of raised temperature (PE-RT) tubing and fitting joining methods and shall comply with Section 605.8.1. 605.8.1 Mechanical Joints. Fittings for PE-RT tubing shall comply with the applicable standards listed in Table 604.1. Mechanical joints for PE-RT tubing shall be installed in accordance with the manufacturer’s instal lation instructions.
605.9 PEX Plastic Tubing and Joints. ¶
605.9 PEX Plastic Tubing and Joints. PEX plastic tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.9.1 through Section 605.9.3. All PEX pipe installed in California must provide at least 30-day UV protection. [OSHPD 1, 1R, 2, 3, 4 & 5] Instal- lation and use of PEX tubing shall be in accordance with manufacturer’s standards. PEX piping shall not be used for any application that would result in noncompliance with any provisions of the California Building Standards Code. 605.9.1 Fittings.…
605.10 PEX-AL-PEX Plastic Tubing and Joints. ¶
605.10 PEX-AL-PEX Plastic Tubing and Joints. PEXAL-PEX plastic pipe or tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.10.1 and Section 605.10.1.1. [BSC, DSA-SS, HCD 1 & HCD 2] PEX-AL-PEX is not adopted for use in potable water supply and distribution sys- tems. 605.10.1 Mechanical Joints. Mechanical joints between PEX-AL-PEX tubing and fittings shall include mechanical and compression type fittings and insert fittings with a crimping ring. Insert fittings utilizing a crimping ring shall…
605.11 Polypropylene (PP) Piping and Joints. PP pipe ¶
605.11 Polypropylene (PP) Piping and Joints. PP pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.11.1 through Section 605.11.3. 605.11.1 Heat-Fusion Joints. Heat-fusion joints for polypropylene (PP) pipe and fitting joints shall be installed with socket-type heat-fused polypropylene fittings, fusion outlets, butt-fusion polypropylene fittings or pipe, or electro-fusion polypropylene fittings. Joint surfaces shall be clean and free from moisture. The joint shall be undisturbed until cool. Joints shall be made…
605.12 PVC Plastic Pipe and Joints. PVC plastic pipe ¶
605.12 PVC Plastic Pipe and Joints. PVC plastic pipe and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.12.1 through Section 605.12.3. PVC piping shall not be exposed to direct sunlight. Exception: PVC piping in a location exposed to direct sunlight shall not exceed 24 inches (610 mm) in length and be wrapped with not less than 0.04 of an inch (1.02 mm) thick UV resistant tape or otherwise protected from UV degradation . 605.12.1 Mechanical Joints. Mechanical joints shall be designed to provide a…
605.13 Stainless Steel Pipe and Joints. ¶
605.13 Stainless Steel Pipe and Joints. Joining methods for stainless steel pipe and fittings shall be installed in 152 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION accordance with the manufacturer’s installation instructions and shall comply with Section 605.13.1 or Section 605.13.2. 605.13.1 Mechanical Joints. Mechanical joints shall be designed for their intended use. Such joints shall include compression, flanged, grooved, press-connect, and threaded.…
605.14 Slip Joints. ¶
605.14 Slip Joints. In water piping, slip joints shall be permitted to be used only on the exposed fixture supply.
605.15 Dielectric Unions. Dielectric unions where installed ¶
605.15 Dielectric Unions. Dielectric unions where installed at points of connection where there is a dissimilarity of metals shall be in accordance with ASSE 1079 or IAPMO PS 66. [DSA-SS, HCD 1, HCD 2, OSHPD 1, 1R, 2, 3, 4 & 5] Dielectric unions shall be used at all points of connection where there is a dissimilarity of metals.
605.16 Joints Between Various Materials. Joints ¶
605.16 Joints Between Various Materials. Joints between various materials shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.16.1 through Section 605.16.3. 605.16.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. Joints from copper or copper alloy pipe or tubing to threaded pipe shall be made using copper alloy adapter, copper alloy nipple [minimum 6 inches (152 mm)], dielectric fitting, or dielectric union in accordance with ASSE 1079 or IAPMO PS 66. The joint between the copper or copper alloy pipe or tubing…
606.0 Valves. ¶
606.1 General. Valves up to and including 2 inches (50 ¶
606.1 General. Valves up to and including 2 inches (50 mm) in size shall be copper alloy or other approved material. Sizes exceeding 2 inches (50 mm) shall be permitted to have bodies of cast iron, copper alloy, or other approved materials. Each gate or ball valve shall be a fullway or full-port type with working parts of the non-corrosive material. Where valves are made from copper alloys containing more than 15 percent zinc by weight and are used in plastic piping systems, they shall be resistant to dezincification and stress corrosion cracking in compliance with NSF/ANSI 14. Valves…
606.2 Fullway Valve. A fullway valve controlling outlets ¶
606.2 Fullway Valve. A fullway valve controlling outlets shall be installed on the discharge side of each water meter and each unmetered water supply. Water piping supplying more than one building on one premise shall be equipped with a separate fullway valve to each building, so arranged that the water supply can be turned on or off to an individual or separate building provided; however, that supply piping to a single-family residence and building accessory thereto shall be permitted to be controlled by one valve. Such shutoff valves shall be accessible. A fullway valve shall be installed…
606.3 Multidwelling Units. In multidwelling units, one or ¶
606.3 Multidwelling Units. In multidwelling units, one or more shutoff valves shall be provided in each dwelling unit so that the water supply to a plumbing fixture or group of fixtures in that dwelling unit can be shut off without stopping water supply to fixtures in other dwelling units. These valves shall be accessible in the dwelling unit that they control.
606.4 Multiple Openings. Valves used to control two or ¶
606.4 Multiple Openings. Valves used to control two or more openings shall be fullway gate valves, ball valves, or other approved valves designed and approved for the service intended.
606.5 Control Valve. A control valve shall be installed ¶
606.5 Control Valve. A control valve shall be installed immediately ahead of each water-supplied appliance and immediately ahead of each slip joint or appliance supply. Parallel water distribution systems shall provide a control valve either immediately ahead of each fixture being supplied or installed at the manifold, and shall be identified with the fixture being supplied. Where parallel water distribution system manifolds are located in attics, crawl spaces, or other locations not readily accessible, a separate shutoff valve shall be required immediately ahead of each individual fixture or…
606.6 Accessible. Required shutoff or control valves shall ¶
606.6 Accessible. Required shutoff or control valves shall be accessible.
606.7 Multiple Fixtures. A single control valve shall be ¶
606.7 Multiple Fixtures. A single control valve shall be installed on a water supply line ahead of an automatic metering valve that supplies a battery of fixtures.
606.8 [OSHPD 1, 1R, 2, 3, 4 & 5] Each riser or branch ¶
606.8 [OSHPD 1, 1R, 2, 3, 4 & 5] Each riser or branch shall be provided with an accessible sectionalizing valve in hot-and cold-water systems to permit servicing or replace- ment of piping or equipment. Stop valves shall be provided at each fixture.
606.9 Check Valve Required. All systems that circulate ¶
606.9 Check Valve Required. All systems that circulate water by means of a pump or other mechanical device or method shall have a check valve(s) or equal device(s) installed so as to ensure the direction of flow. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION » » » »
606.10 Leak Detection Devices. Where leak detection ¶
606.10 Leak Detection Devices. Where leak detection devices for water supply and distribution are installed, they shall comply with ANSI/CAN/IAPMO Z1349.
607.0 Potable Water Supply Tanks. ¶
607.1 General. Potable water supply tanks shall be installed in ¶
607.1 General. Potable water supply tanks shall be installed in accordance with the manufacturer’s installation instructions and supported in accordance with the California Building Code .
607.2 Private Well Water Tanks. Pressurized potable water ¶
607.2 Private Well Water Tanks. Pressurized potable water tanks for private well water systems shall comply with ASSE 1099/WSC-PST 2000.
607.3 Potable Water Tanks. Potable water supply tanks, ¶
607.3 Potable Water Tanks. Potable water supply tanks, interior tank coatings, or tank liners intended to supply drinking water shall comply with NSF/ANSI/CAN 61.
607.4 Venting. Tanks used for potable water shall be tightly ¶
607.4 Venting. Tanks used for potable water shall be tightly covered and vented in accordance with the manufacturer’s installation instructions. Such vent shall be screened with a cor rosion-resistant material of not less than number 24 mesh.
607.5 Overflow. Tanks shall have not less than a 16 square ¶
607.5 Overflow. Tanks shall have not less than a 16 square inch (0.01 m [2] ) overflow that is screened with a corrosionresistant material of not less than number 24 mesh.
607.6 Valves. Pressurized tanks shall be provided with a listed ¶
607.6 Valves. Pressurized tanks shall be provided with a listed pressure-relief valve installed in accordance with the manufacturer’s installation instructions. The relief valve shall be discharged in accordance with Section 608.5. Where a potable water supply tank is located above the fixtures, appliances, or system components it serves, it shall be equipped with a vacuum relief valve that complies with ANSI Z21.22/CSA 4.4.
608.0 Water Pressure, Pressure Regulators, Pres- ¶
608.0 Water Pressure, Pressure Regulators, Pres- sure Relief Valves, and Vacuum Relief Valves.
608.1 Inadequate Water Pressure. ¶
608.1 Inadequate Water Pressure. Where the water pressure in the main or other source of supply will not provide a residual water pressure of not less than 15 pounds force per square inch (psi) (103 kPa), after allowing for friction and other pressure losses, a tank and a pump or other means that will provide said 15 psi (103 kPa) pressure shall be installed. Where fixtures, fixture fittings, or both are installed that, require a residual pressure exceeding 15 psi (103 kPa), that minimum residual pressure shall be provided.
608.2 Excessive Water Pressure. Where static water ¶
608.2 Excessive Water Pressure. Where static water pressure in the water supply piping exceeds 80 psi (552 kPa), an approved-type pressure regulator preceded by an adequate strainer shall be installed and the static pressure reduced to 80 psi (552 kPa) or less. Pressure regulators for potable water distribution systems shall comply with ASSE 1003 or AWWA C530. Pressure regulator(s) equal to or exceeding 1 [1] ⁄ 2 inches (40 mm) shall not require a strainer. Such regulator(s) shall control the pressure to water outlets in the building unless otherwise approved by the Authority Having…
608.3 Expansion Tanks, and Combination Tempera- ¶
608.3 Expansion Tanks, and Combination Tempera- ture and Pressure-Relief Valves. A water system provided with a check valve, backflow preventer, or other normally closed device that prevents dissipation of building pressure back into the water main, independent of the type of water heater used, shall be provided with an approved, listed, and adequately sized expansion tank or other approved device having a similar function to control thermal expansion. Prepressurized water expansion tanks shall comply with IAPMO/ANSI Z1088. Such expansion tank or other approved device shall be installed on…
608.4 Pressure Relief Valves. Each pressure relief valve ¶
608.4 Pressure Relief Valves. Each pressure relief valve shall be an approved automatic type with drain, and each such relief valve shall be set at a pressure of not more than 150 psi (1034 kPa). No shutoff valve shall be installed between the relief valve and the system.
608.5 Discharge Piping. The discharge piping serving a ¶
608.5 Discharge Piping. The discharge piping serving a temperature relief valve, pressure relief valve, or combination of both shall have no valves, obstructions, or means of isolation and be provided with the following: (1) Not less than the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down. (2) Materials shall be rated at not less than the operating temperature of the system and approved for such use or shall comply with ASME A112.4.1. (3) Discharge pipe shall discharge independently by gravity through an air gap…
608.6 Water-Heating Devices. A water-heating device ¶
608.6 Water-Heating Devices. A water-heating device connected to a separate storage tank and having valves between said heater and tank shall be provided with an approved water pressure relief valve.
608.7 Vacuum Relief Valves. Where a hot-water storage ¶
608.7 Vacuum Relief Valves. Where a hot-water storage tank or an indirect water heater is located at an elevation above the fixture outlets in the hot-water system, a vacuum relief valve that complies with ANSI Z21.22/CSA 4.4 shall be installed on the storage tank or heater.
609.0 Installation, Testing, Unions, and Location. ¶
609.0 Installation, Testing, Unions, and Location.
609.1 Installation. ¶
609.1 Installation. Water piping shall be adequately supported in accordance with Table 313.3. Burred ends shall be reamed to the full bore of the pipe or tube. Changes in direction shall be made by the appropriate use of fittings, except that changes in direction in copper or copper alloy tubing shall be permitted to be made with bends, provided that such bends are made with bending equipment that does not deform or create a loss in the cross-sectional area of the tubing. Changes in direction are allowed with flexible pipe and tubing without fittings in accordance with the manufacturer’s…
609.2 Trenches. Water pipes shall not be run or laid in the ¶
609.2 Trenches. Water pipes shall not be run or laid in the same trench as building sewer or drainage piping con structed of clay or materials that are not approved for use within a building unless both of the following conditions are met: (1) The bottom of the water pipe shall be not less than 12 inches (305 mm) above the top of the sewer or drain line. (2) The water pipe shall be placed on a solid shelf excavated at one side of the common trench with a clear horizontal distance of not less than 12 inches (305 mm) from the sewer or drain line. Water pipes crossing sewer or drainage piping…
609.3 Under Concrete Slab. Water piping installed within ¶
609.3 Under Concrete Slab. Water piping installed within a building and in or under a concrete floor slab resting on the ground shall be installed in accordance with the following requirements: (1) Ferrous piping shall have a protective coating of an approved type; machine applied and in accordance with recognized standards. Field wrapping shall provide equivalent protection and shall be restricted to those short sections and fittings necessarily stripped for threading. Zinc coating (galvanizing) shall not be deemed adequate protection for piping or fittings. Approved nonferrous piping shall…
609.4 Testing. Upon completion of a section or of the entire ¶
609.4 Testing. Upon completion of a section or of the entire hot and cold water supply system, the system shall be tested with water or air. The potable water test pressure shall be greater than or equal to the working pressure under which the system is to be used. The air pressure shall be a minimum of 50 psi (345 kPa). Plastic pipe shall not be tested with air. The piping system shall withstand the test pressure without showing evidence of leakage for a period of not less than 15 minutes. Exception: PEX, PP or PE-RT tube shall be permitted to be tested with air where permitted by the…
609.5 Unions. Unions shall be installed in the water supply ¶
609.5 Unions. Unions shall be installed in the water supply piping not more than 12 inches (305 mm) of regulating equipment, water heating, conditioning tanks, and similar equipment that requires service by removal or replacement in a manner that will facilitate its ready removal.
609.6 Location. Except as provided in Section 609.7, no ¶
609.6 Location. Except as provided in Section 609.7, no building supply shall be located in a lot other than the lot that is the site of the building or structure served by such building supply.
609.7 Abutting Lot. Nothing contained in this code shall ¶
609.7 Abutting Lot. Nothing contained in this code shall be construed to prohibit the use of an abutting lot to: (1) Provide access to connect a building supply to an available public water service where proper cause and legal easement not in violation of other requirements have been first established to the satisfaction of the Authority Having Jurisdiction. (2) Provide additional space for a building supply where the proper cause, transfer of ownership, or change of boundary not in violation of other requirements have been first established to the satisfaction of the Authority Having…
609.8 Pumps. Pumps shall be installed in accordance with ¶
609.8 Pumps. Pumps shall be installed in accordance with the manufacturer’s installation instructions. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION 609.8.1 Access. Pumps shall be accessible for repairs. 609.8.2 Potable Water Pumps. Pumps intended to supply drinking water shall be in accordance with NSF/ANSI/CAN 61. 609.8.3 Hot-Water Recirculating Pumps. For healthcare facilities, long term care facilities, hotels, or motels, devices that automatically turn off the recirculation pump(s) shall…
609.9 Low-Pressure Cutoff Required on Booster ¶
609.9 Low-Pressure Cutoff Required on Booster Pumps for Water Distribution Systems. Where a booster pump (excluding a fire pump) is connected to a building supply or underground water pipe, a low-pressure cutoff switch on the inlet side of the pump shall be installed not more than 5 feet (1524 mm) of the inlet. The cutoff switch shall be set for not less than 10 psi (69 kPa). A pressure gauge shall be installed between the shutoff valve and the pump.
609.10 Disinfection of Potable Water System. New or ¶
609.10 Disinfection of Potable Water System. New or repaired potable water systems shall be disinfected prior to use where required by the Authority Having Jurisdiction. [OSHPD 1, 1R, 2, 3, 4 & 5] Prior to utilization of newly constructed or altered potable water piping systems, all affected potable water piping shall be disinfected using pro- cedures prescribed in California Plumbing Code Sections 609.10(1) through 609.10(5). The method to be followed shall be that prescribed by the Health Authority or, in case no method is prescribed by it, the following: (1) The pipe system shall be…
609.11 Water Hammer. [Not adopted by HCD] Building ¶
609.11 Water Hammer. [Not adopted by HCD] Building water supply systems where quick-acting valves are installed shall be provided with water hammer arrester(s) to absorb high pressures resulting from the quick closing of these valves. Water hammer arresters shall be approved mechanical devices that comply with ASSE 1010 or PDI-WH 201 and shall be installed as close as possible to quick-acting valves. 609.11.1 Mechanical Devices. Where listed mechanical devices are used, the manufacturer’s specifications as to location and method of installation shall be followed.
609.12 Pipe Insulation. Insulation of domestic hot water ¶
609.12 Pipe Insulation. Insulation of domestic hot water piping shall be in accordance with Section 609.12.1 and Section 609.12.2. 609.12.1 Insulation Requirements. Domestic hot water piping shall be insulated. 609.12.2 Pipe Insulation Wall Thickness. Hot water pipe insulation shall have a minimum wall thickness of not less than the diameter of the pipe for a pipe up to 2 inches (50 mm) in diameter. Insulation wall thickness shall be not less than 2 inches (51 mm) for a pipe of 2 inches (50 mm) or more in diameter. Exceptions: (1) Piping that penetrates framing members shall not be required…
610.0 Size of Potable Water Piping. ¶
610.1 Size. The size of each water meter and each potable ¶
610.1 Size. The size of each water meter and each potable water supply pipe from the meter or other source of supply to the fixture supply branches, risers, fixtures, connections, outlets, or other uses shall be based on the total demand and shall be determined according to the methods and procedures outlined in this section. Water piping systems shall be designed to ensure that the maximum velocities allowed by the code and the applicable standard are not exceeded.
610.2 Pressure Loss. Where a water filter, water softener, ¶
610.2 Pressure Loss. Where a water filter, water softener, backflow prevention device, tankless water heater, or similar device is installed in a water supply line, the pressure loss through such devices shall be included in the pressure loss calculations of the system, and the water supply pipe and meter shall be adequately sized to provide for such a pressure loss. No water filter, water softener, backflow prevention device, or similar device regulated by this code shall be installed in a potable water supply piping where the installation of such device produces an excessive pressure drop…
610.3 Quantity of Water. The quantity of water required to be ¶
610.3 Quantity of Water. The quantity of water required to be supplied to every plumbing fixture shall be represented by fixture units, as shown in Table 610.3. Equivalent fixture values shown in Table 610.3 include both hot and cold water demand.
610.4 Sizing Water Supply and Distribution Systems. ¶
610.4 Sizing Water Supply and Distribution Systems. Systems within the range of Table 610.4 shall be permitted to be sized from that table or by the method in accordance with Section 610.5. Listed parallel water distribution systems shall be installed in accordance with their listing, but at no time shall a portion of the system exceed the maximum velocities allowed by the code.
610.5 Sizing per Appendices A, C, and M . Except as ¶
610.5 Sizing per Appendices A, C, and M . Except as provided in Section 610.4, the size of each water piping system shall be determined in accordance with the procedure set forth in Appendix A. For alternative methods of sizing water supply systems, see Appendix C or Appendix M .
610.6 Friction and Pressure Loss. Except where the type ¶
610.6 Friction and Pressure Loss. Except where the type of pipe used and the water characteristics are such that no decrease in capacity due to the length of service (age of system) is expected, friction-loss data shall be obtained from the “Fairly Rough” or “Rough” charts in Appendix A of this code. Friction or pressure losses in a water meter, valve, and fittings shall be obtained from the same sources. Pressure losses through water-treating equipment, backflow prevention devices, or other flow-restricting devices shall be computed in accordance with Section 610.2.
610.7 Conditions for Using Table 610.4. On a proposed ¶
610.7 Conditions for Using Table 610.4. On a proposed water piping installation sized using Table 610.4, the following conditions shall be determined: (1) Total number of fixture units as determined from Table 610.3, Equivalent Fixture Units, for the fixtures to be installed. (2) Developed length of supply pipe from meter to the most remote outlet. (3) Difference in elevation between the meter or other source of supply and the highest fixture or outlet. (4) Pressure in the street main or another source of supply at the locality where the installation is to be made. (5) In localities where…
610.8 Size of Meter and Building Supply Pipe Using ¶
610.8 Size of Meter and Building Supply Pipe Using Table 610.4. The size of the meter and the building supply pipe shall be determined as follows: (1) Determine the available pressure at the water meter or other source of supply. (2) Add or subtract depending on positive or negative elevation change, [1] ⁄ 2 psi (3.4 kPa) for each foot (305 mm) of difference in elevation between such source of supply and the highest water supply outlet in the building or on the premises. (3) Use the “pressure range” group within which this pressure will fall using Table 610.4. (4) Select the “length” column…
610.9 Size of Branches. ¶
610.9 Size of Branches. Where Table 610.4 is used, the minimum size of each branch shall be determined by the total fixture units served by that branch and then following the steps in Section 610.8. No branch piping shall exceed the total demand in fixture units for the system computed from Table 610.3.
610.10 Sizing for Flushometer Valves. Where using ¶
610.10 Sizing for Flushometer Valves. Where using Table 610.4 to size water supply systems serving flushometer valves, the number of flushometer fixture units assigned to every section of pipe, whether branch or main, shall be determined by the number and category of flushometer valves served by that section of pipe, in accordance with Table 610.10. Piping supplying a flushometer valve shall be not less in size than the valve inlet. Where using Table 610.10 to size water piping, care shall be exercised to assign flushometer fixture units based on the number and category of fixtures served.…
610.11 Sizing Systems for Flushometer Tanks. The size ¶
610.11 Sizing Systems for Flushometer Tanks. The size of branches and mains serving flushometer tanks shall be consistent with the sizing procedures for flush tank water closets.
610.12 Sizing for Velocity. Water piping systems shall not ¶
610.12 Sizing for Velocity. Water piping systems shall not exceed the maximum velocities listed in this section or Appendix A. 610.12.1 Copper Tube Systems. Maximum velocities in copper and copper alloy tube and fitting systems shall not exceed 8 feet per second (ft/s) (2.4 m/s) in cold water and 5 ft/s (1.5 m/s) in hot water. 610.12.2 Tubing Systems Using Copper Fittings. Maximum velocities through copper fittings in tubing other than copper shall not exceed 8 ft/s (2.4 m/s) in cold water and 5 ft/s (1.5 m/s) in hot water.
610.13 Exceptions. The provisions of this section relative ¶
610.13 Exceptions. The provisions of this section relative to the size of water piping shall not apply to the following: (1) Water supply piping systems designed in accordance with recognized engineering procedures acceptable to the Authority Having Jurisdiction. (2) Alteration of or minor additions to existing installations provided the Authority Having Jurisdiction finds that there will be an adequate supply of water to operate fixtures. (3) Replacement of existing fixtures or appliances. (4) Piping that is part of fixture equipment. (5) Unusual conditions where, in the judgment of the…
611.0 Drinking Water Treatment Units. ¶
611.0 Drinking Water Treatment Units.
611.1 Application. Drinking water treatment units shall ¶
611.1 Application. Drinking water treatment units shall comply with the applicable referenced standards in Table 611.1. 611.1.1 Alkaline Water Treatment. Alkaline water treatment devices shall comply with IAPMO IGC 322. 611.1.2 Scale Reduction Devices. Scale reduction devices shall comply with IAPMO/ANSI Z601.
611.2 Air Gap Discharge. Discharge from drinking water ¶
611.2 Air Gap Discharge. Discharge from drinking water treatment units shall enter the drainage system through an air gap in accordance with Table 603.3.1 or an air gap device that complies with Table 603.2, NSF/ANSI 58, or IAPMO PS 65.
611.3 Connection Tubing. ¶
611.3 Connection Tubing. The tubing to and from drinking water treatment units shall be of a size and material as recommended by the manufacturer.
611.4 Sizing of Residential Softeners. Residential-use ¶
611.4 Sizing of Residential Softeners. Residential-use water softeners shall be sized in accordance with Table 611.4.
612.0 Residential Fire Sprinkler Systems. ¶
612.0 Residential Fire Sprinkler Systems.
612.1 Installation. Residential Sprinkler Systems shall be ¶
612.1 Installation. Residential Sprinkler Systems shall be installed in compliance with the California Residential Code or the California Fire Code. 160 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION Col1TABLE 611.1 DRINKING WATER TREATMENT UNITSCol3Col4 ------------ APPLICATIONRESIDENTIALRESIDENTIALCOMMERCIAL APPLICATIONPOINT OF USEPOINT OF ENTRYPOINT OF ENTRY Aesthetic Contaminant<brReduction (filters)NSF/ANSI 42NSF/ANSI 42ASSE 1087 and NSF/ANSI 42 Health Related…
613.0 Domestic Hot-Water Distribution Systems for ¶
613.0 Domestic Hot-Water Distribution Systems for Health Facilities and Clinics. [OSHPD 1, 2, 3, 4 & 5]
613.1 The domestic water-heating equipment and distribu- ¶
613.1 The domestic water-heating equipment and distribu- tion systems shall supply water at the temperature and amounts shown in Table 613.1. Where the system is designed by a mechanical engineer, appropriate diversity factors may be utilized. TABLE 613.1 [OSHPD 1, 2, 3, 4 & 5] HOT WATER USE Col1CLINICALDIETARY1LAUNDRY2 ------------ <brLiter/Hour/Bed11.97.27.6 <brGallons/Hour/Bed322 <br<brTemperature °C41-49.049.0371.0 <br<brTemperature °F105-120.0120.03160.0 1 Rinse water temperature at warewasher or potsinks shall be 180°F (82°C) unless a chemical disinfection is provided. 2 The required…
613.2 At least two pieces of hot-water-heating equipment shall ¶
613.2 At least two pieces of hot-water-heating equipment shall be provided to supply hot water for dishwashing and minimum patient services such as handwashing and bathing. The arrangement of water-heating equipment shall be based on the capacity and capability of the equipment to provide the required hot water during periods of breakdown or mainte- nance of any one water heater. Booster heaters for 125°F to 180°F (52°C to 82°C) water are acceptable as a second piece of equipment for dishwashing. Where storage tanks are sepa- rate from the water heater, at least two independent storage tanks…
613.3 Instantaneous heaters are permitted for supplying hot ¶
613.3 Instantaneous heaters are permitted for supplying hot water to handwashing and bathing fixtures if a continuous mechanical recirculation system is also provided.
613.4 Water storage tanks shall be fabricated of corrosion- ¶
613.4 Water storage tanks shall be fabricated of corrosion- resistant materials or lined with corrosion-resistant materials.
613.5 Temperature control valves shall be provided to auto- ¶
613.5 Temperature control valves shall be provided to auto- matically regulate the temperature of hot water delivered to plumbing fixtures used by patients to a range of 105°F (41°C) minimum to 120°F (49°C) maximum. High temperature alarm set at 125°F (52°C) shall be provided. The audible/visual device for the high temperature alarm shall annunciate at a continuously occupied location.
613.6 Hot-water distribution system serving patient care areas ¶
613.6 Hot-water distribution system serving patient care areas shall be under constant mechanical recirculation to provide continuous hot water at each hot water outlet. Hot water recir- culation piping shall return the recirculation loop back through the hot water source. Non-recirculated fixture branch piping shall not exceed 10 feet (3.05 meters) in length. Dead-end pip- ing (risers with no flow, branches with no fixture) shall not be installed. In renovation projects, dead-end piping shall be removed in the area of renovation. Empty risers, mains, and branches installed for future use…
613.7 At fixtures where water exceeding 125°F (52°C) is acces- ¶
613.7 At fixtures where water exceeding 125°F (52°C) is acces- sible to patients or personnel, warning signs in letters at least 2 inches (51 mm) high shall be posted above the fixtures.
613.8 Sectionalizing valves shall be provided as required by ¶
613.8 Sectionalizing valves shall be provided as required by Section 606.8. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. WATER SUPPLY AND DISTRIBUTION
613.9 Hot water distribution shall include test ports and valved ¶
613.9 Hot water distribution shall include test ports and valved openings for flushing of portions of the system in accordance with the facilities water management program as defined in Appendix N.
614.0 Dialysis Water-Distribution Systems. [OSHPD 1, ¶
614.0 Dialysis Water-Distribution Systems. [OSHPD 1, 2, 3, 4 & 5]
614.1 Dialysis water feedlines shall be CPVC (chlorinated ¶
614.1 Dialysis water feedlines shall be CPVC (chlorinated polyvinyl chloride), PVC (polyvinyl chloride), glass, stainless steel, PEX, PVDF (polyvinylidene fluoride), or other material deemed acceptable by ANSI/AAMI/ISO 23500-2 and sized to provide a minimum velocity of 1.5 feet per second (0.46 m/s). The piping shall be a singleloop system with or without recir- culation. Branches to dialysis machines shall be [1] ∕ 4 inch (6.4 mm) inside dimension and take off from the bottom of the main feedline. Branch lines may be PFA (perfluoroalkoxy).
614.2 All piping for multistation or central dialysis units shall ¶
614.2 All piping for multistation or central dialysis units shall be rigid where possible. All piping and tubing shall be in a neat arrangement. The placement of piping or tubing on the floor is not permitted.
614.3 All valves shall be located in accessible locations. ¶
614.3 All valves shall be located in accessible locations.
614.4 Piping and valves shall be identified according to their ¶
614.4 Piping and valves shall be identified according to their function.
614.5 A means of preventing backwashing or flushing of the ¶
614.5 A means of preventing backwashing or flushing of the system when one or more stations are in operation shall be pro- vided.
614.6 A continuous audible alarm shall sound at the nurses’ ¶
614.6 A continuous audible alarm shall sound at the nurses’ station and remote equipment rooms when the minimum veloc- ity is not maintained, or if backwashing or flushing is attempted while one or more stations are in operation.
614.7 Water treatment equipment and water used for dialysis ¶
614.7 Water treatment equipment and water used for dialysis treatment shall meet the latest edition of American Association of Medical Instrumentations (AAMI)/ISO ANSI/AAMI/ISO 23500-2 and 23500-3, Preparation And Quality Management Of Fluids For Haemodialysis And Related Therapies—Part 2: Water Treatment Equipment for Hemodialysis Applications And Related Therapies and Part 3: Water For Haemodialysis And Related Therapies.
614.8 A diagram of all piping as installed shall be posted at the ¶
614.8 A diagram of all piping as installed shall be posted at the nurses’ station and equipment room of all multistation or cen- tral dialysis units.
615.0 Identification of Potable and Nonpotable Water ¶
615.0 Identification of Potable and Nonpotable Water Lines.
615.1 Uses Not Permitted. ¶
615.1 Uses Not Permitted. 615.1.1 [OSHPD 1, 1R, 2, 3, 4 & 5] Nonpotable water shall not be piped for drinking, washing or bathing, wash- ing of clothing, cooking, washing of food, washing of cook- ing or eating utensils, washing of food preparation or processing premises, or other personal service rooms.
615.2 [OSHPD 1, 1R, 2, 3, 4 & 5] Non-potable water sys- ¶
615.2 [OSHPD 1, 1R, 2, 3, 4 & 5] Non-potable water sys- tems or systems carrying any other non-potable substance shall be installed so as to prevent backflow or back-siphonage into a potable water system.
615.3 [OSHPD 1, 1R, 2, 3, 4 & 5] Outlets for non-potable ¶
615.3 [OSHPD 1, 1R, 2, 3, 4 & 5] Outlets for non-potable water, such as water for industrial or fire-fighting purposes, shall be posted in a manner understandable to all employees to indicate that the water is unsafe and shall not be used for drink- ing, washing, cooking or other personal service purposes.
616.0 Emergency Water Supply. [OSHPD 1] ¶
616.0 Emergency Water Supply. [OSHPD 1]
616.1 For new acute care hospital buildings submitted after ¶
616.1 For new acute care hospital buildings submitted after the effective date of this code, the hospital shall have an on- site water supply sufficient to operate essential hospital util- ities and equipment in the acute care hospital building, to support 72 hours of continuing operation in the event of an emergency. Any general acute care hospital in operation after January 1, 2030 shall have an on-site water supply sufficient to operate essential hospital utilities and equipment in the acute care hospital buildings on the campus with an SPC-3, SPC-4, SPC 4D, or SPC-5 rating, to support 72…
616.2 The emergency supply of water shall be provided at ade- ¶
616.2 The emergency supply of water shall be provided at ade- quate pressure using gravity, pressure tanks, or booster pumps. Pumps used for this purpose shall be provided with electrical power from the on-site emergency power supply system.
616.3 Storage tank connections and circulation shall be ¶
616.3 Storage tank connections and circulation shall be designed to limit water stagnation and temperature stratifi- cation. Supplemental disinfection and circulation shall be provided where the disinfection levels of the public water sup- ply are not adequate to maintain minimum levels of disinfec- tant for water quality consistent with the facility’s water management program. 162 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE CHAPTER 7 -…
701.0 General. ¶
701.1 Applicability. This chapter shall govern the materials, ¶
701.1 Applicability. This chapter shall govern the materials, design, and installation of sanitary drainage systems and building sewers.
701.2 Drainage Piping. Materials for drainage piping shall ¶
701.2 Drainage Piping. Materials for drainage piping shall be in accordance with one of the referenced standards in Table 701.2 except that: (1) No galvanized wrought-iron or galvanized steel pipe shall be used underground and shall be kept not less than 6 inches (152 mm) aboveground. (2) ABS and PVC DWV piping installations shall be installed in accordance with applicable standards referenced in Table 701.2 and the firestop protection require- ments in the California Building Code . Except for individual single-family dwelling units, materials exposed within ducts or plenums shall have a…
701.3 Drainage Fittings. Materials for drainage fittings ¶
701.3 Drainage Fittings. Materials for drainage fittings shall comply with the applicable standards referenced in Table 701.2 of the same diameter as the piping served, and such fittings shall be compatible with the type of pipe used. 701.3.1 Screwed Pipe. Fittings on screwed pipe shall be of the recessed drainage type. Burred ends shall be reamed to the full bore of the pipe. 701.3.2 Threads. The threads of drainage fittings shall be tapped to allow [1] ⁄ 4 inch per foot (20.8 mm/m) grade. 701.3.3 Type. Fittings used for drainage shall be of the drainage type, have a smooth interior…
701.4 Continuous Wastes. Continuous wastes and fixture ¶
701.4 Continuous Wastes. Continuous wastes and fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping, provided, however, that such connections where exposed or accessible shall be permitted to be of seamless drawn brass not less than No. 20 B & S Gauge (0.032 inches) (0.8 mm).
701.5 Lead. (See Chapter 17) Sheet lead shall comply with ¶
701.5 Lead. (See Chapter 17) Sheet lead shall comply with the following: (1) For safe pans – not less than 4 pounds per square foot (lb/ft [2] ) (19 kg/m [2] ) or [1] ⁄ 16 of an inch (1.6 mm) thick. (2) For flashings or vent terminals – not less than 3 lb/ft [2] (15 kg/m [2] ) or 0.0472 of an inch (1.2 mm) thick. (3) Lead bends and lead traps shall be not less than [1] ⁄ 8 of an inch (3.2 mm) in wall thickness.
701.6 Caulking Ferrules. ¶
701.6 Caulking Ferrules. Caulking ferrules shall be manufactured from copper or copper alloy and shall be in accordance with Table 701.6.
701.7 Soldering Bushings. Soldering bushings shall be ¶
701.7 Soldering Bushings. Soldering bushings shall be of copper or copper alloy and shall be in accordance with Table 701.7. TABLE 701.6 CAULKING FERRULES PIPE SIZE<br(inches)INSIDE<brDIAMETER<br(inches)LENGTH<br(inches)MINIMUM WEIGHT EACHCol5 --------------- <br <br<brPIPE SIZE <br(inches)INSIDE<brDIAMETER <br(inches)LENGTH <br(inches)poundsounces <br<br221⁄441⁄210 <br<br331⁄441⁄2112 <br<br441⁄441⁄228 For SI units: 1 inch = 25 mm, 1 pound = 0.453 kg, 1 ounce = 0.02834 kg TABLE 701.7 SOLDERING BUSHINGS PIPE SIZE<br(inches)MINIMUM WEIGHT<brEACHCol3PIPE SIZE<br(inches)MINIMUM WEIGHT<brEACHCol6…
702.0 Fixture Unit Equivalents. ¶
702.1 Trap Size. The unit equivalent of plumbing fixtures ¶
702.1 Trap Size. The unit equivalent of plumbing fixtures shown in Table 702.1 shall be based on the size of the trap TABLE 701.6 CAULKING FERRULES For SI units: 1 inch = 25 mm, 1 pound = 0.453 kg, 1 ounce = 0.02834 kg TABLE 701.7 SOLDERING BUSHINGS For SI units: 1 inch = 25 mm, 1 pound = 0.453 kg, 1 ounce = 0.02834 kg ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. SANITARY DRAINAGE TABLE 701.2 MATERIALS FOR DRAIN, WASTE, VENT PIPE AND FITTINGS MATERIALUNDERGROUND<brDRAIN, WASTE,<brVENT PIPE…
702.2 Intermittent Flow. ¶
702.2 Intermittent Flow. Drainage fixture units for intermittent flow into the drainage system shall be computed on the rated discharge capacity in gallons per minute (gpm) (L/s) in accordance with Table 702.2. TABLE 702.1(1) MAXIMUM DRAINAGE FIXTURE UNITS FOR A TRAP AND TRAP ARM For SI Units: 1 inch = 25 mm Exception: On self-service laundries. TABLE 702.2 DISCHARGE CAPACITY IN GALLONS PER MINUTE FOR INTERMITTENT FLOW ONLY GPMFIXTURE UNITS ------ <brUp to 71⁄2Equals 1 Fixture Unit <brGreater than 71⁄2 to 15Equals 2 Fixture Units <brGreater than 15 to 30Equals 4 Fixture Units <brGreater than…
702.3 Continuous Flow. For a continuous flow into a ¶
702.3 Continuous Flow. For a continuous flow into a drainage system, such as from a pump, sump ejector, air conditioning equipment, or similar device, 2 fixture units shall be equal to each gallon per minute (gpm) (L/s) of flow.
703.0 Size of Drainage Piping. ¶
703.1 Minimum Size. ¶
703.1 Minimum Size. The minimum sizes of vertical, horizontal, or both drainage piping shall be determined from the total of fixture units connected thereto, and additionally, in the case of vertical drainage pipes, in accordance with their length.
703.2 Maximum Number of Fixture Units. Table 703.2 ¶
703.2 Maximum Number of Fixture Units. Table 703.2 shows the maximum number of fixture units allowed on a vertical or horizontal drainage pipe, building drain, or building sewer of a given size; the maximum number of fixture units allowed on a branch interval of a given size; and the maximum length (in feet and meters) of a vertical drainage pipe of a given size.
703.3 Sizing per Appendix C. For alternate method of ¶
703.3 Sizing per Appendix C. For alternate method of sizing drainage piping, see Appendix C.
704.0 Fixture Connections (Drainage). ¶
704.0 Fixture Connections (Drainage).
704.1 Inlet Fittings. Drainage piping shall be provided with ¶
704.1 Inlet Fittings. Drainage piping shall be provided with approved inlet fittings for fixture connections, correctly located according to the size and type of fixture proposed to be connected.
704.2 Single Vertical Drainage Pipe. Two fixtures set ¶
704.2 Single Vertical Drainage Pipe. Two fixtures set back-to-back, or side-by-side, within the distance allowed between a trap and its vent, shall be permitted to be served by a single vertical drainage pipe provided that each fixture wastes separately into an approved double-fixture fitting having inlet openings at the same level.
704.3 Commercial Sinks. ¶
704.3 Commercial Sinks. Pot sinks, scullery sinks, dishwashing sinks, silverware sinks, and other similar fixtures shall be connected directly to the drainage system. A floor drain shall be provided adjacent to the fixture and shall be connected on the sewer side of the sink. No other drainage 168 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. SANITARY DRAINAGE TABLE 703.2 MAXIMUM UNIT LOADING AND MAXIMUM LENGTH OF DRAINAGE AND VENT PIPING SIZE OF PIPE (inches)11⁄411⁄22345681012…
705.0 Joints and Connections. ¶
705.1 ABS and ABS Co-Extruded Plastic Pipe and ¶
705.1 ABS and ABS Co-Extruded Plastic Pipe and Joints. Joining methods for ABS plastic pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.1.1 through Section 705.1.3. 705.1.1 Mechanical Joints. Mechanical joints shall be designed to provide a permanent seal and shall be of the mechanical or push-on joint. The push-on joint shall include an elastomeric gasket that complies with ASTM D3212 and shall provide a compressive force against the spigot and socket after assembly to provide a permanent seal. 705.1.2…
705.2 Cast-Iron Pipe and Joints. Joining methods for ¶
705.2 Cast-Iron Pipe and Joints. Joining methods for cast-iron pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.2.1 or Section 705.2.2. 705.2.1 Caulked Joints. Caulked joints shall be firmly packed with oakum or hemp and filled with molten lead to a depth of not less than 1 inch (25.4 mm) in one continuous pour. The lead shall be caulked thoroughly at the inside and outside edges of the joint. After caulking, the finished joint shall not exceed [1] ⁄ 8 of an inch (3.2 mm) below the rim of the hub. No paint,…
705.3 Copper or Copper Alloy Pipe (DWV) and ¶
705.3 Copper or Copper Alloy Pipe (DWV) and Joints. Joining methods for copper or copper alloy pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.3.1 through Section 705.3.4. 705.3.1 Brazed Joints. Brazed joints between copper or copper alloy pipe and fittings shall be made with brazing alloys having a liquid temperature above 1000°F (538°C). The joint surfaces to be brazed shall be cleaned bright by either manual or mechanical means. Piping shall be cut square and reamed to full inside diameter. Brazing flux…
705.4 Galvanized Steel Pipe and Joints. ¶
705.4 Galvanized Steel Pipe and Joints. Joining methods for galvanized steel pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.4.1 or Section 705.4.2. 705.4.1 Mechanical Joints. Mechanical joints shall be made with an elastomeric gasket. 705.4.2 Threaded Joints. Threaded joints shall be made with pipe threads that comply with ASME B1.20.1. Thread sealant tape or compound shall be applied only to male threads, and such material shall be of approved types, insoluble in water, and nontoxic.
705.5 Polyethylene (PE) Sewer Pipe. Polyethylene (PE) ¶
705.5 Polyethylene (PE) Sewer Pipe. Polyethylene (PE) sewer pipe or tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.5.1 through Section 705.5.1.3. 705.5.1 Heat-Fusion Joints. Heat-fusion joints between PE sewer pipe or tubing and fittings shall be assembled in accordance with Section 705.5.1.1 through Section 705.5.1.3 using butt-fusion, electro-fusion, or socket-fusion heat methods. Do not disturb the joint until cooled to ambient temperature. 705.5.1.1 Butt-Fusion Joints. Butt-fusion…
705.6 PVC and PVC Co-Extruded Plastic Pipe and ¶
705.6 PVC and PVC Co-Extruded Plastic Pipe and Joining Methods. Joining methods for PVC plastic pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.6.1 through Section 705.6.3. 705.6.1 Mechanical Joints. Mechanical joints shall be designed to provide a permanent seal and shall be of the mechanical or push-on joint type. The push-on joint shall include an elastomeric gasket that complies with ASTM D3212 and shall provide a compressive force against the spigot and socket after assembly to provide a permanent…
705.7 Stainless Steel Pipe and Joints. ¶
705.7 Stainless Steel Pipe and Joints. Joining methods for stainless steel pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.7.1 or Section 705.7.2. 705.7.1 Mechanical Joints. Mechanical joints between stainless steel pipe and fittings shall be of the compression, grooved coupling, hydraulic press-connect fittings, or flanged. 705.7.2 Welded Joints. Welded joints between stainless steel pipe and fittings shall be made in accordance with ASME A112.3.1 and shall be welded autogenously. Pipe shall be cleaned,…
705.8 Vitrified Clay Pipe and Joints. Joining methods ¶
705.8 Vitrified Clay Pipe and Joints. Joining methods for vitrified clay pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 705.8.1. 705.8.1 Mechanical Joints. Mechanical joints shall be designed to provide a permanent seal and shall be of the mechanical or push-on joint type. The push-on joint shall include an elastomeric gasket that complies with ASTM C425 and shall provide a compressive force against the spigot and socket after assembly to provide a permanent seal.
705.9 Special Joints. ¶
705.9 Special Joints. Special joints shall comply with Section 705.9.1 through Section 705.9.4. 705.9.1 Slip Joints. In fixture drains and traps, slip joints of approved materials shall be permitted to be used in accordance with their approvals. 705.9.2 Expansion Joints. Expansion joints shall be accessible, except where in vent piping or drainage stacks, and shall be permitted to be used where necessary to provide for expansion and contraction of the pipes. 705.9.3 Ground Joint, Flared, or Ferrule Con- nections. Copper or copper alloy ground joint flared, or ferrule-type connections that…
705.10 Joints Between Various Materials. Joints ¶
705.10 Joints Between Various Materials. Joints between various materials shall be installed in accordance with the manufacturer’s installation instructions and with Section 705.10.1 through Section 705.10.4. Mechanical couplings used to join different materials shall comply with ASTM C1173 for belowground use, ASTM C1460 for aboveground use, or ASTM C1461 for aboveground and belowground use. 705.10.1 Copper or Copper Alloy Pipe to Cast- Iron Pipe. Joints from copper or copper alloy pipe or tubing to cast-iron pipe shall be made with a listed compression-type joint or copper alloy ferrule.…
706.0 Changes in Direction of Drainage Flow. ¶
706.0 Changes in Direction of Drainage Flow.
706.1 Approved Fittings. Changes in the direction of ¶
706.1 Approved Fittings. Changes in the direction of drainage piping shall be made by the appropriate use of approved fittings and shall be of the angles presented by a one-sixteenth bend, one-eighth bend, or one-sixth bend, or other approved fittings of equivalent sweep.
706.2 Horizontal to Vertical. Horizontal drainage lines, ¶
706.2 Horizontal to Vertical. Horizontal drainage lines, connecting with a vertical stack, shall enter through 45 degree (0.79 rad) wye branches, 60 degree (1.05 rad) wye branches, combination wye and one-eighth bend branches, sanitary tee or sanitary tapped tee branches, or other approved fittings of equivalent sweep. No fitting having more than one inlet at the same level shall be used unless such fitting is constructed so that the discharge from one inlet cannot readily enter any other inlet. Double sanitary tees shall be permitted to be used where the barrel of the fitting is not less…
706.3 Horizontal to Horizontal. Horizontal drainage lines ¶
706.3 Horizontal to Horizontal. Horizontal drainage lines connecting with other horizontal drainage lines shall enter through 45 degree (0.79 rad) wye branches, combination wye and one-eighth bend branches, or other approved fittings of equivalent sweep.
706.4 Vertical to Horizontal. ¶
706.4 Vertical to Horizontal. Vertical drainage lines connecting with horizontal drainage lines shall enter through 45 degree (0.79 rad) wye branches, combination wye and oneeighth bend branches, or other approved fittings of equivalent sweep. Branches or offsets of 60 degrees (1.05 rad) shall be permitted to be used where installed in a true vertical position.
707.0 Cleanouts. ¶
707.1 Plug. ¶
707.1 Plug. Each cleanout fitting for cast-iron pipe shall consist of a cast-iron or copper alloy body and an approved plug. Each cleanout for galvanized wrought iron, galvanized steel, copper, or copper alloy pipe shall consist of a plug as specified in Table 707.1, or a standard weight copper alloy cap, or an approved ABS or PVC plastic plug, or an approved stainless steel cleanout or plug. Plugs shall have raised square heads or approved countersunk rectangular slots. TABLE 707.1 CLEANOUTS SIZE OF PIPE<br(inches)SIZE OF CLEANOUT<br(inches)THREADS<br(per inches) --------- <br11⁄211⁄2111⁄2…
707.2 Approved. Each cleanout fitting and each cleanout ¶
707.2 Approved. Each cleanout fitting and each cleanout plug or cap shall be of an approved type. A list of approved standards for cleanouts are referenced in Table 707.2. TABLE 707.2 CLEANOUT MATERIALS FOR DRAIN, WASTE, AND VENT MATERIALSTANDARD ------ <br <brABS1ASTM D2661, CSA B79,<brIAPMO IGC 78, IAPMO IGC 224 <br <br<brCast IronASME A112.36.2M, ASTM A888,<brCISPI 301, CSA B79,<brIAPMO IGC 224 <br <brCopper or Copper AlloyASME A112.36.2M, CSA B79 <brDuctile IronCSA B79 <brElastomersCSA B79, IAPMO PS 90 <brPolyethylene (PE)CSA B79 <brPolypropylene (PP)CSA B79 <br<brPVC1ASTM D2665, CSA…
707.3 Watertight and Gastight. Cleanouts shall be ¶
707.3 Watertight and Gastight. Cleanouts shall be designed to be watertight and gastight.
707.4 Location. ¶
707.4 Location. Each horizontal drainage pipe shall be provided with a cleanout at its upper terminal, and each run of piping, that is more than 100 feet (30 480 mm) in total developed length, shall be provided with a cleanout for each 100 feet (30 480 mm), or fraction thereof, in length of such piping. An additional cleanout shall be provided in a drainage line for each aggregate horizontal change in direction exceeding 135 degrees (2.36 rad). A cleanout shall be installed above the fixture connection fitting, serving each urinal, regardless of the location of the urinal in the building.…
707.5 Cleaning. Each cleanout shall be installed so that it ¶
707.5 Cleaning. Each cleanout shall be installed so that it opens to allow cleaning in the direction of flow of the soil or waste or at right angles thereto and, except in the case of wye branch and end-of-line cleanouts, shall be installed vertically above the flow line of the pipe.
707.6 Extension. ¶
707.6 Extension. Each cleanout extension shall be considered as drainage piping and each 90 degree (1.57 rad) cleanout extension shall be extended from a wye-type fitting or other approved fitting of equivalent sweep.
707.7 Interceptor. Each cleanout for an interceptor shall be ¶
707.7 Interceptor. Each cleanout for an interceptor shall be outside of such interceptor.
707.8 Access. Each cleanout, unless installed under an ¶
707.8 Access. Each cleanout, unless installed under an approved cover plate, shall be above grade, readily accessible, and so located as to serve the purpose for which it is intended. Cleanouts located under cover plates shall be so installed as to provide the clearances and accessibility required by this section.
707.9 Clearance. Each cleanout in piping 2 inches (50 mm) ¶
707.9 Clearance. Each cleanout in piping 2 inches (50 mm) or less in size shall be so installed that there is a clearance of not less than 18 inches (457 mm) by 18 inches (457 mm) in front of the cleanout. Cleanouts in piping exceeding 2 inches (50 mm) shall have a clearance of not less than 24 inches (610 mm) by 24 inches (610 mm) in front of the cleanout. Cleanouts in under-floor piping shall be extended to or above the finished floor or shall be extended outside the building where there is less than 18 inches (457 mm) vertical overall, allowing for obstructions such as ducts, beams, and…
707.10 Fittings. Cleanout fittings shall be not less in size ¶
707.10 Fittings. Cleanout fittings shall be not less in size than those given in Table 707.1.
707.11 Pressure Drainage Systems. Cleanouts shall be ¶
707.11 Pressure Drainage Systems. Cleanouts shall be provided for pressure drainage systems as classified under Section 710.7.
707.12 Countersunk Cleanout Plugs. Countersunk ¶
707.12 Countersunk Cleanout Plugs. Countersunk cleanout plugs shall be installed where raised heads cause a hazard.
707.13 Hubless Blind Plugs. Where a hubless blind plug ¶
707.13 Hubless Blind Plugs. Where a hubless blind plug is used for a required cleanout, the complete coupling and plug shall be accessible for removal or replacement.
707.14 Trap Arms. Cleanouts for trap arms shall be installed ¶
707.14 Trap Arms. Cleanouts for trap arms shall be installed in accordance with Section 1002.3.
708.0 Grade of Horizontal Drainage Piping. ¶
708.0 Grade of Horizontal Drainage Piping.
708.1 General. Building drain and other horizontal drainage ¶
708.1 General. Building drain and other horizontal drainage piping shall be run in practical alignment and a uniform slope of not less than [1] ⁄ 4 inch per foot (20.8 mm/m) or 2 percent toward the point of disposal. Where it is impractical due to the depth of the street sewer, structural features, or to the arrangement of a building or structure to obtain a slope of [1] ⁄ 4 inch per foot (20.8 mm/m) or 2 percent, building drain piping 4 inches (100 mm) or larger in diameter shall be permitted to have a slope of not less than [1] ⁄ 8 inch per foot (10.4 mm/m) or 1 percent, when first approved…
709.0 Gravity Drainage Required. ¶
709.1 General. Where practicable, plumbing fixtures shall ¶
709.1 General. Where practicable, plumbing fixtures shall be drained to the public sewer or private sewage disposal system by gravity.
710.0 Drainage of Fixtures Located Below the Next ¶
710.0 Drainage of Fixtures Located Below the Next Upstream Manhole or Below the Main Sewer Level.
710.1 Backflow Protection. Fixtures installed on a floor ¶
710.1 Backflow Protection. Fixtures installed on a floor level that is lower than the next upstream manhole cover of the public, or private sewer shall be protected from backflow of sewage by installing an approved type of backwater valve. Fixtures on such floor level that are not below the next upstream manhole cover shall not be required to be protected by a backwater valve. Fixtures on floor levels above such elevation shall not discharge through the backwater valve. Cleanouts for drains that pass through a backwater valve shall be clearly identified with a permanent label stating…
710.2 Sewage Discharge. ¶
710.2 Sewage Discharge. Drainage piping serving fixtures that are located below the crown level of the main sewer shall discharge into an approved watertight sump or receiving tank, so located as to receive the sewage or wastes by gravity. From such sump or receiving tank, the sewage or other liquid wastes shall be lifted and discharged into the building drain or building sewer by approved ejectors, pumps, or other equally efficient approved mechanical devices.
710.3 Sewage Ejector and Pumps. A sewage ejector or ¶
710.3 Sewage Ejector and Pumps. A sewage ejector or sewage pump receiving the discharge of water closets or urinals: (1) Shall have a discharge capacity of not less than 20 gpm (1.26 L/s). (2) In single dwelling units, the ejector or pump shall be capable of passing an 1 [1] ⁄ 2 inch (38 mm) diameter solid ball, and the discharge piping of each ejector or pump ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. SANITARY DRAINAGE shall have a backwater valve and gate valve, and be not less than 2 inches (50 mm) in diameter. (3)…
710.4 Discharge Line. ¶
710.4 Discharge Line. The discharge line from such ejector, pump, or another mechanical device shall be of approved pressure rated material and be provided with an accessible backwater or swing check valve and gate or ball valve. Where the gravity drainage line to which such discharge line connects is horizontal, the method of connection shall be from the top through a wye branch fitting. The gate or ball valve shall be located on the discharge side of the backwater or check valve. Gate or ball valves, where installed in drainage piping, shall be fullway type with working parts of…
710.5 Size of Building Drains and Sewers. Building ¶
710.5 Size of Building Drains and Sewers. Building drains or building sewers receiving a discharge from a pump or ejector shall be adequately sized to prevent overloading. Two fixture units shall be allowed for each gallon per minute (L/s) of flow.
710.6 Backwater Valves. Backwater valves, gate valves, ¶
710.6 Backwater Valves. Backwater valves, gate valves, fullway ball valves, unions, motors, compressors, air tanks, and other mechanical devices required by this section shall be located where they will be accessible for inspection and repair and, unless continuously exposed, shall be enclosed in a masonry pit fitted with an adequately sized removable cover. Backwater valves shall comply with ASME A112.14.1 or IAPMO IGC 305, and have bodies of cast-iron, plastic, copper alloy, or other approved materials; shall have noncorrosive bearings, seats, and self-aligning discs; and shall be…
710.7 Drainage and Venting Systems. The drainage and ¶
710.7 Drainage and Venting Systems. The drainage and venting systems, in connection with fixtures, sumps, receiving tanks, and mechanical waste-lifting devices shall be installed under the same requirements as provided for in this code for gravity systems.
710.8 Sump and Receiving Tank Construction. Sumps ¶
710.8 Sump and Receiving Tank Construction. Sumps and receiving tanks shall be watertight and shall be constructed of concrete, metal, or other approved materials. Where constructed of poured concrete, the walls and bottom shall be adequately reinforced and designed to recognized acceptable standards. Metal sumps or tanks shall be of such thickness as to serve their intended purpose and shall be treated internally and externally to resist corrosion.
710.9 Alarm. ¶
710.9 Alarm. Such sumps and receiving tanks shall be automatically discharged and, wherein a “public use” occupancy, shall be provided with dual pumps or ejectors arranged to function alternately in normal use and independently. Such pumps shall be capable of running continuously in case of overload or mechanical failure of one of the pumps or ejectors. The pumps shall have an audio and visual alarm, readily accessible, that signals pump failure or an overload condition. The lowest inlet shall have a clearance of not less than 2 inches (51 mm) from the high-water or “starting” level of the…
710.10 Sump and Receiving Tank Covers and Vents. ¶
710.10 Sump and Receiving Tank Covers and Vents. Sumps and receiving tanks shall be provided with substantial covers having a bolt-and-gasket-type manhole or equivalent opening to permit access for inspection, repairs, and cleaning. The top shall be provided with a vent pipe that shall extend separately through the roof or, where permitted, be combined with other vent pipes. Such vent shall be large enough to maintain atmospheric pressure within the sump under normal operating conditions and, in no case, shall be less in size than that required by Table 703.2 for the number and type of…
710.11 Air Tanks. Air tanks shall be so proportioned as to be ¶
710.11 Air Tanks. Air tanks shall be so proportioned as to be of equal cubical capacity to the ejectors connected in addition to that in which there shall be maintained an air pressure of not less than 2 pounds per foot (lb/ft) (3 kg/m) of height the sewage is to be raised. No water-operated ejectors shall be permitted.
710.12 Grinder Pump Ejector. Grinder pumps shall be ¶
710.12 Grinder Pump Ejector. Grinder pumps shall be permitted to be used. 710.12.1 Discharge Piping. The discharge piping shall be sized in accordance with the manufacturer’s installation instructions and shall be not less than 1 [1] ⁄ 4 inches (32 mm) in diameter. A check valve and fullwaytype shutoff valve shall be located on the discharge line.
710.13 Macerating Toilet Systems and Pumped ¶
710.13 Macerating Toilet Systems and Pumped Waste Systems. Fixtures shall be permitted to discharge to a macerating toilet system, or pumped waste system shall be permitted as an alternate to a sewage pump system where approved by the Authority Having Jurisdiction. Such systems shall comply with ASME A112.3.4/CSA B45.9 and shall be installed in accordance with the manufacturer’s installation instructions. 710.13.1 Sumps. The sump shall be watertight and gastight. 710.13.2 Discharge Piping. The discharge piping shall be sized in accordance with manufacturer’s instructions and shall be not less…
711.0 Suds Relief. ¶
711.1 General. Drainage connections shall not be made into ¶
711.1 General. Drainage connections shall not be made into a drainage piping system within 8 feet (2438 mm) of a vertical to horizontal change of direction of a stack containing suds-producing fixtures. Bathtubs, laundries, washing machine standpipes, kitchen sinks, and dishwashers shall be considered suds-producing fixtures. Where parallel vent stacks are required, they shall connect to the drainage stack at a point 8 feet (2438 mm) above the lowest point of the drainage stack. Exceptions: (1) Single-family residences. (2) Stacks receiving the discharge from less than three stories of…
712.0 Testing. ¶
712.1 Media. ¶
712.1 Media. The piping of the plumbing, drainage, and venting systems shall be tested with water or air except that plastic pipe shall not be tested with air. The Authority Having Jurisdiction shall be permitted to require the removal of cleanouts, etc., to ascertain whether the pressure has reached all parts of the system. After the plumbing fixtures have been set and their traps filled with water, they shall be submitted to a final test.
712.2 Water Test. The water test shall be applied to the ¶
712.2 Water Test. The water test shall be applied to the drainage and vent systems either in its entirety or in sections. Where the test is applied to the entire system, openings in the piping shall be tightly closed, except the highest opening, and the system filled with water to the point of overflow. Where the system is tested in sections, each opening shall be tightly plugged, except the highest opening of the section under test, and each section shall be filled with water, but no section shall be tested with less than a 10 foot head of water (30 kPa). In testing successive sections, not…
712.3 Air Test. The air test shall be made by attaching an ¶
712.3 Air Test. The air test shall be made by attaching an air compressor testing apparatus to a suitable opening and, after closing all other inlets and outlets to the system, forcing air into the system until there is a uniform gauge pressure of 5 pounds-force per square inch (psi) (34 kPa) or sufficient to balance a column of mercury 10 inches (34 kPa) in height. The pressure shall be held without the introduction of additional air for a period of not less than 15 minutes. Part II – Building Sewers.
713.0 Sewer Required. ¶
713.1 Where Required. ¶
713.1 Where Required. A building in which plumbing fixtures are installed and premises having drainage piping thereon shall have a connection to a public or private sewer, except as provided in Section 713.2, and Section 713.4.
713.2 Private Sewage Disposal System. ¶
713.2 Private Sewage Disposal System. Where no public sewer intended to serve a lot or premises is available in a thoroughfare or right of way abutting such lot or premises, drainage piping from a building or works shall be connected to a private sewage disposal system as approved by the Authority Having Jurisdiction. See Appendix H.
713.3 Public Sewer. ¶
713.3 Public Sewer. Within the limits prescribed by Section 713.4 hereof, the rearrangement or subdivision into smaller parcels of a lot that abuts and is served by a public sewer shall not be deemed cause to permit the construction of a private sewage disposal system, and plumbing or drainage systems on a smaller parcel or parcels shall connect to the public sewer.
713.4 Public Sewer Availability. The public sewer shall ¶
713.4 Public Sewer Availability. The public sewer shall be permitted to be considered as not being available where such public sewer or a building or an exterior drainage facility connected thereto is located more than 200 feet (60 960 mm) from a proposed building or exterior drainage facility on a lot or premises that abut and is served by such public sewer. [HCD 1] For residential occupancies, the public sewer may be considered as not being available by the Authority Having Jurisdiction.
713.5 Permit. No permit shall be issued for the installation, ¶
713.5 Permit. No permit shall be issued for the installation, alteration, or repair of a private sewage disposal system, or part thereof, on a lot for which a connection with a public sewer is available.
713.6 Lot. On every lot or premises hereafter connected to ¶
713.6 Lot. On every lot or premises hereafter connected to a public sewer, plumbing, and drainage systems or parts thereof on such lot or premises shall be connected with such public sewer.
713.7 Installation. In cities, counties, or both where the ¶
713.7 Installation. In cities, counties, or both where the installation of building sewers is under the jurisdiction of a department other than the Authority Having Jurisdiction, the provisions of this code relating to building sewers need not apply. Exception: Single-family dwellings and buildings or structures accessory thereto, existing and connected to an approved private sewage disposal system prior to the time of connecting the premises to the public sewer shall be permitted, where no hazard, nuisance, or insanitary condition is evidenced, and written permission has been obtained from…
714.0 Damage to Public Sewer or Private Sewage ¶
714.0 Damage to Public Sewer or Private Sewage Disposal System.
714.1 Unlawful Practices. ¶
714.1 Unlawful Practices. It shall be unlawful for a person to deposit, by means whatsoever, into a plumbing fixture, floor drain, interceptor, sump, receptor, or device which is ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. SANITARY DRAINAGE connected to a drainage system, public sewer, private sewer, septic tank, or cesspool, ashes; cinders; solids; rags; flammable, poisonous, or explosive liquids or gases; oils; grease; and whatsoever that is capable of causing damage to the public sewer, private sewer, or private…
714.2 Prohibited Water Discharge. No rain, surface, or ¶
714.2 Prohibited Water Discharge. No rain, surface, or subsurface water shall be connected to or discharged into a drainage system unless first approved by the Authority Having Jurisdiction.
714.3 Prohibited Sewer Connection. ¶
714.3 Prohibited Sewer Connection. No cesspool, septic tank, seepage pit, or drain field shall be connected to a public sewer or to a building sewer leading to such public sewer.
714.4 Commercial Food Waste Disposer. ¶
714.4 Commercial Food Waste Disposer. The Authority Having Jurisdiction shall review before approval, the installation of a commercial food waste disposer connecting to a private sewage disposal system.
714.5 Tanks. ¶
714.5 Tanks. An approved type, watertight sewage or wastewater holding tank, the contents of which, due to their character, shall be periodically removed and disposed of at some approved off-site location, shall be installed where required by the Authority Having Jurisdiction or the Health Officer to prevent anticipated surface or subsurface contamination or pollution, damage to the public sewer, or other hazardous or nuisance conditions.
715.0 Building Sewer Materials. ¶
715.1 Materials. The building sewer, beginning 2 feet (610 ¶
715.1 Materials. The building sewer, beginning 2 feet (610 mm) from a building or structure, shall be of such materials as prescribed in this code.
715.2 Joining Methods and Materials. Joining methods ¶
715.2 Joining Methods and Materials. Joining methods and materials shall be as prescribed in this code.
715.3 Existing Sewers. Where permitted by the Authority ¶
715.3 Existing Sewers. Where permitted by the Authority Having Jurisdiction, trenchless methods of rehabilitation of existing building sewer and building storm sewers shall be installed in accordance with Section 715.3.1 or Section 715.3.2. 715.3.1 Sewer Pipe Lining. For trenchless installation of resin-impregnated flexible tubing to line existing building sewers and building storm sewers installation shall be in accordance with ASTM F1216, ASTM F2561, ASTM F2599, or ASTM F3240. 715.3.2 Sewer Pipe Replacement. For trenchless installation of polyethylene (PE) pipe using the pipe bursting…
716.0 Markings. ¶
716.1 General. Pipe, brick, block, prefabricated septic ¶
716.1 General. Pipe, brick, block, prefabricated septic tanks, prefabricated septic tank or seepage pit covers, or other parts or appurtenances incidental to the installation of building sewers or private sewage disposal systems shall be in accordance with the approval requirements of Chapter 3 of this code.
717.0 Size of Building Sewers. ¶
717.1 General. The minimum size of a building sewer shall ¶
717.1 General. The minimum size of a building sewer shall be determined on the basis of the total number of fixture units drained by such sewer, in accordance with Table 717.1. No building sewer shall be smaller than the building drain. For alternate methods of sizing building sewers, see Appendix C. TABLE 717.1 MAXIMUM/MINIMUM FIXTURE UNIT LOADING Col1ON BUILDING SEWER PIPINGCol3Col4 ------------ <br <br<brSIZE OF PIPE <br(inches)SLOPE <br(inches per foot)SLOPE <br(inches per foot)SLOPE <br(inches per foot) <br <br<brSIZE OF PIPE <br(inches)1⁄161⁄81⁄4 <br <br6 and smaller(As specified in…
717.2 Meat and Poultry Processing Plants. [AGR] The ¶
717.2 Meat and Poultry Processing Plants. [AGR] The sewer system shall have the capacity to remove all waste from the various processing and cleaning operations and to mini- mize or prevent stoppage and surcharging at the system.
718.0 Grade, Support, and Protection of Building ¶
718.0 Grade, Support, and Protection of Building Sewers.
718.1 Slope. ¶
718.1 Slope. Building sewers shall be run in practical alignment and at a uniform slope of not less than [1] ⁄ 4 inch per foot (20.8 mm/m) toward the point of disposal. Exception: Where approved by the Authority Having Jurisdiction and where it is impractical, due to the depth of the street sewer, the structural features or the arrangement of a building or structure, to obtain a slope of [1] ⁄ 4 inch per foot (20.8 mm/m), piping 4 inches (100 mm) through 6 inches (150 mm) shall be permitted to have a slope of not less than [1] ⁄ 8 inch per foot (10.4 mm/m) and piping 8 inches (200 mm) and…
718.2 Support. Building sewer piping shall be laid on a firm ¶
718.2 Support. Building sewer piping shall be laid on a firm bed throughout its entire length, and such piping laid in made or filled-in ground shall be laid on a bed of approved materials and shall be properly supported as required by the Authority Having Jurisdiction.
718.3 Protection from Damage. No building sewer or ¶
718.3 Protection from Damage. No building sewer or other drainage piping or part thereof, which is constructed of materials other than those approved for use under or within a building, shall be installed under or within 2 feet (610 mm) of a building or structure, or part thereof, nor less than 1 foot (305 mm) below the surface of the ground. The provisions of this subsection include structures such as porches and steps, whether covered or uncovered; breezeways; roofed porte cochere; roofed patios; carports; covered walks; covered driveways; and similar structures or appurtenances. TABLE…
719.0 Cleanouts. ¶
719.1 Locations. ¶
719.1 Locations. Cleanouts shall be placed inside the building near the connection between the building drain and the building sewer or installed outside the building at the lower end of the building drain and extended to grade. Additional building sewer cleanouts shall be installed at intervals not to exceed 100 feet (30 480 mm) in straight runs and for each aggregate horizontal change in direction exceeding 135 degrees (2.36 rad).
719.2 No Additional Cleanouts. Where a building sewer ¶
719.2 No Additional Cleanouts. Where a building sewer or a branch thereof does not exceed 10 feet (3048 mm) in length and is a straight-line projection from a building drain that is provided with a cleanout, no cleanout will be required at its point of connection to the building drain.
719.3 Building Sewer Cleanouts. Required building ¶
719.3 Building Sewer Cleanouts. Required building sewer cleanouts shall be extended to grade and shall be in accordance with the appropriate sections of cleanouts, Section 707.0, for sizing, construction, and materials. Where building sewers are located under buildings, the cleanout requirements of Section 707.0 shall apply.
719.4 Cleaning. Each cleanout shall be installed so that it ¶
719.4 Cleaning. Each cleanout shall be installed so that it opens to allow cleaning in the direction of flow of the soil or waste or at right angles thereto and, except in the case of wye branch and end-of-line cleanouts, shall be installed vertically above the flow line of the pipe.
719.5 Access. Cleanouts installed under concrete or asphalt ¶
719.5 Access. Cleanouts installed under concrete or asphalt paving shall be made accessible by yard boxes or by extending flush with paving with approved materials and shall be adequately protected.
719.6 Manholes. Approved manholes shall be permitted to ¶
719.6 Manholes. Approved manholes shall be permitted to be installed in lieu of cleanouts, where first approved by the Authority Having Jurisdiction. The maximum distance between manholes shall not exceed 300 feet (91 440 mm). The inlet and outlet connections shall be made by the use of a flexible compression joint not less than 12 inches (305 mm) and not exceeding 3 feet (914 mm) from the manhole. No flexible compression joints shall be embedded in the manhole base.
720.0 Sewer and Water Pipes. ¶
720.1 General. Building sewers or drainage piping of clay ¶
720.1 General. Building sewers or drainage piping of clay or materials that are not approved for use within a building shall not be run or laid in the same trench as the water pipes unless the following requirements are met: (1) The bottom of the water pipe, at points, shall be not less than 12 inches (305 mm) above the top of the sewer or drain line. (2) The water pipe shall be placed on a solid shelf excavated at one side of the common trench with a clear horizontal distance of not less than 12 inches (305 mm) from the sewer or drain line. (3) Water pipes crossing sewer or drainage piping…
721.0 Location. ¶
721.1 Building Sewer. Except as provided in Section 721.2, ¶
721.1 Building Sewer. Except as provided in Section 721.2, no building sewer shall be located in a lot other than the lot that is the site of the building or structure served by such sewer nor shall a building sewer be located at a point having less than the minimum distances referenced in Table 721.1. TABLE 721.1 MINIMUM HORIZONTAL DISTANCE REQUIRED FROM BUILDING SEWER (feet) Buildings or structures12 ------ <brProperty line adjoining private propertyClear2 Water supply wells503 <br<brStreams50 <br<brOn-site domestic water service line14 <br<brPublic water main105, 6 For SI units: 1 foot =…
721.2 Abutting Lot. Nothing contained in this code shall be ¶
721.2 Abutting Lot. Nothing contained in this code shall be construed to prohibit the use of all or part of an abutting lot to: (1) Provide access to connect a building sewer to an available public sewer where proper cause and legal easement, not in violation of other requirements, has been first established to the satisfaction of the Authority Having Jurisdiction. (2) Provide additional space for a building sewer where the proper cause, transfer of ownership, or change of boundary, not in violation of other requirements, has been first established to the satisfaction of the Authority Having…
722.0 Abandoned Sewers and Sewage Disposal ¶
722.0 Abandoned Sewers and Sewage Disposal Facilities.
722.1 Building (House) Sewer. An abandoned building ¶
722.1 Building (House) Sewer. An abandoned building (house) sewer, or part thereof, shall be plugged or capped in an approved manner within 5 feet (1524 mm) of the property line. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. SANITARY DRAINAGE
722.2 Cesspools, Septic Tanks, and Seepage Pits. A ¶
722.2 Cesspools, Septic Tanks, and Seepage Pits. A cesspool, septic tank, and seepage pit that has been abandoned or has been discontinued otherwise from further use, or to which no waste or soil pipe from a plumbing fixture is connected, shall have the sewage removed therefrom and be completely filled with earth, sand, gravel, concrete, or other approved material.
722.3 Filling. ¶
722.3 Filling. The top cover or arch over the cesspool, septic tank, or seepage pit shall be removed before filling, and the filling shall not extend above the top of the vertical portions of the sidewalls or above the level of the outlet pipe until inspection has been called and the cesspool, septic tank, or seepage pit has been inspected. After such inspection, the cesspool, septic tank, or seepage pit shall be filled to the level of the top of the ground.
722.4 Ownership. No person owning or controlling a ¶
722.4 Ownership. No person owning or controlling a cesspool, septic tank, or seepage pit on the premises of such person or in that portion of a public street, alley, or other public property abutting such premises, shall fail, refuse, or neglect to comply with the provisions of this section or upon receipt of notice so to comply from the Authority Having Jurisdiction.
722.5 Disposal Facilities. Where disposal facilities are ¶
722.5 Disposal Facilities. Where disposal facilities are abandoned consequent to connecting premises with the public sewer, the permittee making the connection shall fill abandoned facilities in accordance with the Authority Having Jurisdiction within 30 days from the time of connecting to the public sewer.
723.0 Building Sewer Test. ¶
723.1 General. Building sewers shall be tested by plugging ¶
723.1 General. Building sewers shall be tested by plugging the end of the building sewer at its points of connection to the public sewer or private sewage disposal system and completely filling the building sewer with water from the lowest to the highest point thereof, or by approved equivalent lowpressure air test. Plastic DWV piping systems shall not be tested by the air test method. The building sewer shall be watertight.
724.0 Meat and Poultry Processing Plant Drainage. ¶
724.0 Meat and Poultry Processing Plant Drainage. [AGR]
724.1 The drainage and plumbing systems must permit the ¶
724.1 The drainage and plumbing systems must permit the quick runoff of all water from plant buildings, and of surface water around the plant buildings, and of surface water around the plant and on the premises; and all such water shall be dis- posed of in such a manner as to prevent a nuisance or health hazard.
724.2 Toilet soil lines shall be separated from house drainage ¶
724.2 Toilet soil lines shall be separated from house drainage lines to a point outside the building unless an automatic back- water check valve is installed to prevent backflow. Drainage from toilet bowls and urinals shall not be discharged into a grease catch basin, nor shall such drainage be permitted to enter the sewer lines at a point where there might be a possi- bility of such drainage backing up and flooding the floor of the building.
725.0 Collection Center and Facilities Drainage. ¶
725.0 Collection Center and Facilities Drainage. [AGR] Drainage and plumbing systems shall meet the requirements of Section 724.1.
726.0 Drainage and Plumbing, General. [AGR] ¶
726.0 Drainage and Plumbing, General. [AGR]
726.1 The outer premises of every official establishment, ¶
726.1 The outer premises of every official establishment, including docks, areas where cars and other vehicles are loaded, driveways, approaches, yards, pens and alleys, shall be drained.
726.2 Toilet soil lines shall be separated from house drainage ¶
726.2 Toilet soil lines shall be separated from house drainage lines to a point outside the building, and drainage from toilet bowls and urinals shall not be discharged into a grease catch basin.
727.0 Emergency Sanitary Drainage. [OSHPD 1] ¶
727.0 Emergency Sanitary Drainage. [OSHPD 1]
727.1 For new acute care hospital buildings submitted after the ¶
727.1 For new acute care hospital buildings submitted after the effective date of this code, the hospital shall have an on-site holding tank[s] to store sewage and liquid waste sufficient to operate essential hospital utilities and equipment in the acute care hospital building, to support 72 hours of continuing oper- ation in the event of an emergency. Any general acute care hos- pital in operation after January 1, 2030 shall have an on-site holding tank[s] to store sewage and liquid waste sufficient to operate essential hospital utilities and equipment in the acute care hospital buildings on…
801.0 General. ¶
801.1 Applicability. This chapter shall govern the materials, ¶
801.1 Applicability. This chapter shall govern the materials, design, and installation of indirect waste piping, receptors, and connections; and provisions for discharge and disposal of condensate wastes, chemical wastes, industrial wastes, and clear water wastes.
801.2 Air Gap or Air Break Required. ¶
801.2 Air Gap or Air Break Required. Indirect waste piping shall discharge into the building drainage system through an air gap or air break as set forth in this code. Where a drainage air gap is required by this code, the minimum vertical distance as measured from the lowest point of the indirect waste pipe or the fixture outlet to the flood-level rim of the receptor shall be not less than 1 inch (25.4 mm).
801.3 Food and Beverage Handling Establishments. ¶
801.3 Food and Beverage Handling Establishments. Establishments engaged in the storage, preparation, selling, serving, processing, or other handling of food and beverage involving the following equipment that requires drainage shall provide indirect waste piping for refrigerators, refrigeration coils, freezers, walk-in coolers, iceboxes, ice-making machines, steam tables, egg boilers, coffee urns and brewers, hot-and-cold drink dispensers, and similar equipment. 801.3.1 Size of Indirect Waste Pipes. Except for refrigeration coils and ice-making machines, the size of the indirect waste pipe…
801.4 Bar and Fountain Sink Traps. Where the sink in a ¶
801.4 Bar and Fountain Sink Traps. Where the sink in a bar, soda fountain, or counter is so located that the trap serving the sink cannot be vented, the sink drain shall discharge through an air gap or air break (see Section 801.3.3) into an approved receptor that is vented. The developed length from the fixture outlet to the receptor shall not exceed 5 feet (1524 mm).
801.5 Connections from Water Distribution System. ¶
801.5 Connections from Water Distribution System. Indirect waste connections shall be provided for drains, overflows, or relief pipes from potable water pressure tanks, water heaters, boilers, and similar equipment that is connected to the potable water distribution system. Such indirect waste connections shall be made using a water-distribution air gap constructed in accordance with Table 603.3.1.
801.6 Sterilizers. Lines, devices, or apparatus such as stills, ¶
801.6 Sterilizers. Lines, devices, or apparatus such as stills, sterilizers, and similar equipment requiring waste connections and used for sterile materials shall be indirectly connected using an air gap. Each such indirect waste pipe shall be separately piped to the receptor and shall not exceed 15 feet (4572 mm). Such receptors shall be located in the same room.
801.7 Drip or Drainage Outlets. Appliances, devices, or ¶
801.7 Drip or Drainage Outlets. Appliances, devices, or apparatus not regularly classified as plumbing fixtures, but which have a drip or drainage outlets, shall be permitted to be drained by indirect waste pipes discharging into an open receptor through either an air gap or air break (see Section 801.3.1).
802.0 Approvals. ¶
802.1 General. No plumbing fixtures served by indirect ¶
802.1 General. No plumbing fixtures served by indirect waste pipes or receiving discharge therefrom shall be installed until first approved by the Authority Having Jurisdiction.
803.0 Indirect Waste Piping. ¶
803.1 Materials. Pipe, tube, and fittings conveying indirect ¶
803.1 Materials. Pipe, tube, and fittings conveying indirect waste shall be of such materials and design as to perform their intended function to the satisfaction of the Authority Having Jurisdiction.
803.2 Copper and Copper Alloys. ¶
803.2 Copper and Copper Alloys. Joints and connections in copper and copper alloy pipe and tube shall be installed in accordance with Section 705.3.
803.3 Pipe Size and Length. ¶
803.3 Pipe Size and Length. Except as hereinafter provided, the size of indirect waste piping shall be in accordance with other sections of this code applicable to drainage and vent piping. No vent from indirect waste piping shall combine with a sewer-connected vent. Vents from indirect waste piping shall extend separately to the outside air. Indirect waste pipes exceeding 5 feet (1524 mm), but less than 15 feet (4572 mm) in length shall be directly trapped, but such traps need not be vented. Indirect waste pipes less than 15 feet (4572 mm) in length shall be not less than the diameter of the…
804.0 Indirect Waste Receptors. ¶
804.1 Standpipe Receptors. Plumbing fixtures or other ¶
804.1 Standpipe Receptors. Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be approved for the use proposed and shall be of such shape and capacity as to prevent splashing or flooding and shall be located where they are readily accessible for inspection and cleaning. No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap weir. No trap for a clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than 6 inches (152 mm) and…
805.0 Pressure Drainage Connections. ¶
805.0 Pressure Drainage Connections.
805.1 General. Indirect waste connections shall be provided ¶
805.1 General. Indirect waste connections shall be provided for drains, overflows, or relief vents from the water supply system, and no piping or equipment carrying wastes or producing wastes or other discharges under pressure shall be directly connected to a part of the drainage system. The preceding shall not apply to an approved sump pump or to an approved pressure-wasting plumbing fixture or device where the Authority Having Jurisdiction has been satisfied that the drainage system is adequately sized to accommodate the anticipated discharge thereof.
806.0 Sterile Equipment. ¶
806.1 General. Appliances, devices, or apparatus such as ¶
806.1 General. Appliances, devices, or apparatus such as stills, sterilizers, and similar equipment requiring water and waste and used for sterile materials shall be drained through an air gap.
807.0 Appliances. ¶
807.1 Non-Classed Apparatus. Commercial dishwashing ¶
807.1 Non-Classed Apparatus. Commercial dishwashing machines, silverware washing machines, and other appliances, devices, equipment, or other apparatus not regularly classed as plumbing fixtures, which are equipped with pumps, drips, or drainage outlets, shall be permitted to be drained by indirect waste pipes discharging through an air break into an approved type of open receptor.
807.2 Undiluted Condensate Waste. Where undiluted ¶
807.2 Undiluted Condensate Waste. Where undiluted condensate waste from a fuel-burning condensing appliance is discharged into the drainage system, the material in the drainage system shall be cast-iron, galvanized iron, plastic, or other materials approved for this use. Exceptions: (1) Where the above condensate is discharged to an exposed fixture tailpiece and trap, such tailpiece and trap shall be permitted to be a copper alloy. (2) Materials approved in Section 701.0 shall be permitted to be used where data is provided that the condensate waste is adequately diluted.
807.3 Domestic Dishwashing Machine. No domestic ¶
807.3 Domestic Dishwashing Machine. No domestic dishwashing machine shall be directly connected to a drainage system or food waste disposer without the use of an approved dishwasher air gap fitting on the discharge side of the dishwashing machine. Listed dishwasher air gap fittings shall be installed with the flood-level (FL) marking at or above the flood level of the sink or drainboard, whichever is higher.
808.0 Cooling Water. ¶
808.1 General. Where permitted by the Authority Having ¶
808.1 General. Where permitted by the Authority Having Jurisdiction, clean running water used exclusively as a cooling medium in an appliance, device, or apparatus shall be permitted to discharge into the drainage system through the inlet side of a fixture trap in the event that a suitable fixture is not available to receive such discharge. Such trap connection shall be by means of a pipe connected to the inlet side of an approved fixture trap, the upper end terminating in a funnelshaped receptacle set adjacent, and not less than 6 inches (152 mm) above the overflow rim of the fixture.
809.0 Drinking Fountains. ¶
809.1 General. Drinking fountains shall be permitted to be ¶
809.1 General. Drinking fountains shall be permitted to be installed with indirect wastes through an air break.
810.0 Steam and Hot Water Drainage Condensers ¶
810.0 Steam and Hot Water Drainage Condensers and Sumps.
810.1 High-Temperature Discharge. No steam pipe shall ¶
810.1 High-Temperature Discharge. No steam pipe shall be directly connected to plumbing or drainage system, nor shall water having a temperature above 140°F (60°C) be discharged under pressure directly into a drainage system. Pipes from boilers shall discharge by means of indirect waste piping as determined by the Authority Having Jurisdiction or the boiler manufacturer’s recommendations. Such pipes shall be permitted to be indirectly connected by discharging into an open or closed condenser or an intercepting sump of an approved type that will prevent the entrance of steam or such water…
810.2 Sumps, Condensers, and Intercepting Tanks. ¶
810.2 Sumps, Condensers, and Intercepting Tanks. Sumps, condensers, or intercepting tanks that are constructed of concrete shall have walls and bottom, not less than 4 inches (102 mm) in thickness, and the inside shall be cement plastered not less than [1] ⁄ 2 of an inch (12.7 mm) in thickness. Condensers constructed of metal shall be not less than No. 12 U.S. standard gauge (0.109 inch) (2.77 mm), and such metal condensers shall be protected from external corrosion by an approved bituminous coating.
810.3 Cleaning. Sumps and condensers shall be provided ¶
810.3 Cleaning. Sumps and condensers shall be provided with suitable means of access for cleaning and shall contain a volume of not less than twice the volume of water removed from the boiler or boilers connected to it where the normal water level of such boiler or boilers is reduced not less than 4 inches (102 mm).
810.4 Strainers. An indirect waste interceptor is receiving ¶
810.4 Strainers. An indirect waste interceptor is receiving discharge-containing particles that would clog the receptor drain shall have a readily removable beehive strainer.
811.0 Chemical Wastes. ¶
811.1 Pretreatment. Chemical or liquid industrial wastes ¶
811.1 Pretreatment. Chemical or liquid industrial wastes that are likely to damage or increase maintenance costs on the sanitary sewer system, detrimentally affect sewage treatment or contaminate surface or subsurface waters shall be pretreated to render them innocuous before discharge into a drainage system. Detailed construction documents of the pretreatment facilities shall be required by the Authority Having Jurisdiction. Piping conveying industrial, chemical, or process wastes from their point of origin to sewer-connected pretreatment facilities shall be of such material and design as to…
811.2 Waste and Vent Pipes. Each waste pipe receiving or ¶
811.2 Waste and Vent Pipes. Each waste pipe receiving or intended to receive the discharge of a fixture into which acid or corrosive chemical is placed, and each vent pipe connected thereto, shall be constructed of chlorinated polyvinyl chloride (CPVC), polypropylene (PP), polyvinylidene fluoride (PVDF), chemical-resistant glass, high-silicon iron pipe, or lead pipe with a wall thickness of not less than [1] ⁄ 8 of an inch (3.2 mm); an approved type of ceramic glazed or unglazed vitrified clay; or other approved corrosion-resistant materials. CPVC pipe and fittings shall comply with ASTM…
811.3 Joining Materials. Joining materials shall be of ¶
811.3 Joining Materials. Joining materials shall be of approved type and quality.
811.4 Access. ¶
811.4 Access. Where practicable, the piping shall be readily accessible and installed with the maximum of clearance from other services.
811.5 Permanent Record. The owner shall make and keep ¶
811.5 Permanent Record. The owner shall make and keep a permanent record of the location of piping and venting carrying chemical waste.
811.6 Chemical Vent. No chemical vent shall intersect ¶
811.6 Chemical Vent. No chemical vent shall intersect vents for other services.
811.7 Discharge. Chemical wastes shall be discharged in a ¶
811.7 Discharge. Chemical wastes shall be discharged in a manner approved by the Authority Having Jurisdiction.
811.8 Diluted Chemicals. The provisions of this section ¶
811.8 Diluted Chemicals. The provisions of this section about materials and methods of construction shall not apply to installations such as photographic or x-ray darkrooms or research or control laboratories where minor amounts of ade quately diluted chemicals are discharged.
812.0 Clear Water Wastes. ¶
812.1 General. ¶
812.1 General. Water lifts, expansion tanks, cooling jackets, sprinkler systems, drip or overflow pans, or similar devices that discharge clear wastewater into the building drainage system shall discharge through an indirect waste.
813.0 Swimming Pools. ¶
813.1 General. Pipes carrying wastewater from swimming ¶
813.1 General. Pipes carrying wastewater from swimming or wading pools, including pool drainage and backwash from filters, shall be installed as an indirect waste. Where a pump is used to discharge pool waste water to the drainage system, the pump discharge shall be installed as an indirect waste.
814.0 Condensate Waste and Control. ¶
814.1 Condensate Disposal. ¶
814.1 Condensate Disposal. Condensate from air washers, air-cooling coils, condensing appliances, and the over ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. INDIRECT WASTES flow from evaporative coolers and similar water-supplied equipment or similar air-conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area. Where discharged into the drainage system, equipment shall drain using an indirect waste pipe. The waste pipe shall have a slope of not less than [1] ⁄ 8 inch per…
814.2 Condensate Control. Where any equipment or ¶
814.2 Condensate Control. Where any equipment or appliance is installed in a space where damage is capable of resulting from condensate overflow, a drain line shall be provided and shall be drained in accordance with Section 814.1. An additional protection method for condensate overflow shall be provided in accordance with one of the following: (1) A water level detecting device that will shut off the equipment or appliance in the event the primary drain is blocked. Such detecting device shall be in accordance with the manufacturer’s installation instructions. (2) An additional watertight pan…
814.3 Condensate Waste Pipe Material and Sizing. ¶
814.3 Condensate Waste Pipe Material and Sizing. Condensate waste pipes from air-cooling coils shall be sized in accordance with the equipment capacity as specified in Table 814.3. The material of the piping shall comply with the pressure and temperature rating of the appliance or equipment and shall be approved for use with the liquid being discharged. TABLE 814.3 MINIMUM CONDENSATE PIPE SIZE EQUIPMENT CAPACITY IN TONS<brOF REFRIGERATIONMINIMUM CONDENSATE PIPE<brDIAMETER<br(inches) ------ Up to 203⁄4 <br<br21 – 401 <br<br41 – 9011⁄4 <br91 – 12511⁄2 <br126 – 2502 For SI units: 1 ton of…
814.4 Appliance Condensate Drains. Condensate drain ¶
814.4 Appliance Condensate Drains. Condensate drain lines from individual condensing appliances shall be sized as required by the manufacturer’s instructions. Condensate drain lines serving more than one appliance connecting to a common indirect waste pipe shall have the connections to the indirect waste pipe protected by a sanitary waste valve complying with ASME A112.18.8, condensate trap complying with IAPMO IGC 196, or trap with a trap primer.
814.5 Point of Discharge. Air-conditioning condensate ¶
814.5 Point of Discharge. Air-conditioning condensate waste pipes shall connect indirectly to the drainage system through an air gap or air break to trapped and vented receptors, dry wells, mop sinks, leach pits, or the tailpiece of plumbing fixtures. An individual condensate drain shall be trapped in accordance with the appliance manufacturer’s instructions or in accordance with Section 814.4. TABLE 814.3 MINIMUM CONDENSATE PIPE SIZE For SI units: 1 ton of refrigerant = 3.52 kW, 1 inch = 25 mm For SI units: °C = (°F-32)/1.8 184 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may…
814.6 Condensate Waste from Air-Conditioning ¶
814.6 Condensate Waste from Air-Conditioning Coils. Where the condensate waste from air-conditioning coils discharges by direct connection to a lavatory tailpiece or to an approved accessible inlet on a bathtub overflow, the connection shall be located in the area controlled by the same person controlling the air-conditioned space.
814.7 Plastic Fittings. Female plastic screwed fittings shall ¶
814.7 Plastic Fittings. Female plastic screwed fittings shall be used with male plastic fittings and plastic threads. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. 186 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE CHAPTER 9 - VENTS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building…
901.0 General. ¶
901.1 Applicability. This chapter shall govern the materials, ¶
901.1 Applicability. This chapter shall govern the materials, design, and installation of plumbing vent systems.
901.2 Vents Required. Each plumbing fixture trap, except ¶
901.2 Vents Required. Each plumbing fixture trap, except as otherwise provided in this code, shall be protected against siphonage and backpressure, and air circulation shall be ensured throughout all parts of the drainage system by means of vent pipes installed in accordance with the requirements of this chapter and as otherwise required by this code.
901.3 Trap Seal Protection. The vent system shall be ¶
901.3 Trap Seal Protection. The vent system shall be designed to prevent a trap seal from being exposed to a pressure differential that exceeds 1 inch water column (0.24 kPa) on the outlet side of the trap.
902.0 Vents Not Required. ¶
902.1 Interceptor. Vent piping shall be permitted to be ¶
902.1 Interceptor. Vent piping shall be permitted to be omitted on an interceptor where such interceptor acts as a primary settling tank and discharges through a horizontal indirect waste pipe into a secondary interceptor. The second interceptor shall be properly trapped and vented.
902.2 Bars, Soda Fountains, and Counter. ¶
902.2 Bars, Soda Fountains, and Counter. Traps serving sinks that are part of the equipment of bars, soda fountains, and counters need not be vented where the location and construction of such bars, soda fountains, and counters are such as to make it impossible to do so. Where such conditions exist, said sinks shall discharge using approved indirect waste pipes into a floor sink or other approved type of recep tor.
903.0 Materials. ¶
903.1 Applicable Standards. Vent pipe and fittings shall ¶
903.1 Applicable Standards. Vent pipe and fittings shall comply with the applicable standards referenced in Table 701.2, except that: (1) No galvanized steel or 304 stainless steel pipe shall be installed underground and shall be not less than 6 inches (152 mm) aboveground. (2) ABS and PVC DWV piping installations shall be in accordance with the firestop protection requirements in the California Building Code . Except for individual single-family dwelling units, materials exposed within ducts or plenums shall have a flame-spread index of not more than 25 and a smoke-developed index of not…
903.2 Use of Copper or Copper Alloy Tubing. Copper ¶
903.2 Use of Copper or Copper Alloy Tubing. Copper or copper alloy tube for underground drainage and vent piping shall have a weight of not less than that of copper or copper alloy drainage tube type DWV. 903.2.1 Aboveground. Copper or copper alloy tube for aboveground drainage and vent piping shall have a weight of not less than that of copper or copper alloy drainage tube type DWV. 903.2.2 Prohibited Use. Copper or copper alloy tube shall not be used for chemical or industrial wastes as defined in Section 811.0. 903.2.3 Marking. Copper or copper alloy tubing, in addition to the required…
903.3 Changes in Direction. Changes in the direction of ¶
903.3 Changes in Direction. Changes in the direction of vent piping shall be made by the appropriate use of approved fittings, and no such pipe shall be strained or bent. Burred ends shall be reamed to the full bore of the pipe.
904.0 Size of Vents. ¶
904.1 Size. The size of vent piping shall be determined from ¶
904.1 Size. The size of vent piping shall be determined from its length and the total number of fixture units connected thereto, in accordance with Table 703.2. The diameter of an individual vent shall be not less than 1 [1] ⁄ 4 inches (32 mm) nor less than one-half the diameter of the drain to which it is connected. In addition, the drainage piping of each building and each connection to a public sewer or a private sewage disposal system shall be vented by means of one or more vent pipes, the aggregate cross-sectional area of which shall be not less than that of the largest required building…
904.2 Length. ¶
904.2 Length. Not more than one-third of the total permitted length, in accordance with Table 703.2, of a minimumsized vent shall be installed in a horizontal position. Where a minimum-sized vent is increased one pipe size for its entire length, the maximum length limitation shall not apply. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. VENTS
905.0 Vent Pipe Grades and Connections. ¶
905.0 Vent Pipe Grades and Connections.
905.1 Grade. Vent and branch vent pipes shall be free from ¶
905.1 Grade. Vent and branch vent pipes shall be free from drops or sags, and each such vent shall be level or shall be so graded and connected as to drip back by gravity to the drainage pipe it serves.
905.2 Horizontal Drainage Pipe. Where vents connect to ¶
905.2 Horizontal Drainage Pipe. Where vents connect to a horizontal drainage pipe, each vent pipe shall have its invert taken off above the drainage centerline of such pipe downstream of the trap being served.
905.3 Vent Pipe Rise. ¶
905.3 Vent Pipe Rise. Unless prohibited by structural conditions, each vent shall rise vertically to a point not less than 6 inches (152 mm) above the flood-level rim of the fixture served before offsetting horizontally, and where two or more vent pipes converge, each such vent pipe shall rise to a point not less than 6 inches (152 mm) in height above the floodlevel rim of the plumbing fixture it serves before being connected to any other vent. Vents less than 6 inches (152 mm) above the flood-level rim of the fixture shall be installed with approved drainage fittings, material, and grade to…
905.4 Roof Termination. ¶
905.4 Roof Termination. Vent pipes shall extend undiminished in size above the roof, or shall be reconnected with soil or waste vent of the proper size.
905.5 Location of Opening. The vent pipe opening from ¶
905.5 Location of Opening. The vent pipe opening from soil or waste pipe shall not be below the weir of the trap. Exception: Water closets and similar fixtures.
905.6 Common Vertical Pipe. ¶
905.6 Common Vertical Pipe. Two fixtures shall be permitted to be served by a common vertical pipe where each such fixture wastes separately into an approved double fitting having inlet openings at the same level.
906.0 Vent Termination. ¶
906.1 Roof Termination. Each vent pipe or stack shall ¶
906.1 Roof Termination. Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 6 inches (152 mm) above the roof nor less than 1 foot (305 mm) from a vertical surface. ABS and PVC piping exposed to sunlight shall be protected by water based synthetic latex paints.
906.2 Clearance. Each vent shall terminate not less than ¶
906.2 Clearance. Each vent shall terminate not less than 10 feet (3048 mm) from, or not less than 3 feet (914 mm) above, an openable window, door, opening, air intake, or vent shaft, or not less than 3 feet (914 mm) in every direction from a lot line, alley and street excepted. 906.2.1 [OSHPD 1,1R, 2, 3, 4 & 5] Each vent pipe shall terminate not less than twenty-five (25) feet (7620 mm) from any air intake or vent shaft.
906.3 Use of Roof. Vent pipes shall be extended separately ¶
906.3 Use of Roof. Vent pipes shall be extended separately or combined, of full required size, not less than 6 inches (152 mm) above the roof or firewall. Flagpoling of vents shall be prohibited except where the roof is used for assembly purposes or parking. Vents within 10 feet (3048 mm) of a part of the roof that is used for assembly purposes or parking shall extend not less than 7 feet (2134 mm) above such roof and shall securely stay.
906.4 Outdoor Installations. Vent pipes for outdoor ¶
906.4 Outdoor Installations. Vent pipes for outdoor installations shall extend not less than 10 feet (3048 mm) above the surrounding ground and shall be securely supported.
906.5 Joints. Joints at the roof around vent pipes shall be ¶
906.5 Joints. Joints at the roof around vent pipes shall be made watertight by the use of approved flashings or flashing material.
906.6 Lead. (See Chapter 17) Sheet lead shall comply with ¶
906.6 Lead. (See Chapter 17) Sheet lead shall comply with the following: (1) For safe pans – not less than 4 pounds per square foot (lb/ft [2] ) (19 kg/m [2] ) or [1] ⁄ 16 of an inch (1.6 mm) thick. (2) For flashings or vent terminals – not less than 3 lb/ft [2] (15 kg/m [2] ) or 0.0472 of an inch (1.2 mm) thick. (3) Lead bends and lead traps shall be not less than [1] ⁄ 8 of an inch (3.2 mm) in wall thickness.
906.7 Frost or Snow Closure. ¶
906.7 Frost or Snow Closure. Where frost or snow closure is likely to occur in locations having minimum design temperature below 0°F (-17.8°C), vent terminals shall be not less than 3 inches (76 mm) in diameter, but in no event smaller than the required vent pipe. The change in diameter shall be made inside the building not less than 1 foot (305 mm) below the roof in an insulated space and terminate not less than 10 inches (254 mm) above the roof, or in accordance with the Authority Having Jurisdiction.
907.0 Vent Stacks and Relief Vents. ¶
907.1 Drainage Stack. Each drainage stack that extends 10 ¶
907.1 Drainage Stack. Each drainage stack that extends 10 or more stories shall be served by a parallel vent stack, which shall extend undiminished in size from its upper terminal and connect to the drainage stack at or immediately below the lowest fixture drain. Each such vent stack shall also be connected to the drainage stack at each fifth floor, counting down from the uppermost fixture drain, using a yoke vent, the size of which shall be not less in diameter than either the drainage or the vent stack, whichever is smaller.
907.2 Yoke Vent. The yoke vent connection to the vent stack ¶
907.2 Yoke Vent. The yoke vent connection to the vent stack shall be placed not less than 42 inches (1067 mm) above the floor level, and the yoke vent connection to the drainage stack shall be using a wye-branch fitting placed below the lowest drainage branch connection serving that floor.
908.0 Wet Venting. ¶
908.1 Vertical Wet Venting. ¶
908.1 Vertical Wet Venting. Wet venting is limited to vertical drainage piping receiving the discharge from the trap arm of one and two fixture unit fixtures that also serves as a vent not exceeding four fixtures. Wet-vented fixtures shall be within the same story; provided, further, that fixtures with a continuous vent discharging into a wet vent shall be within the same story as the wet-vented fixtures. No wet vent shall exceed 6 feet (1829 mm) in developed length. 908.1.1 Size. The vertical piping between two consecutive inlet levels shall be considered a wet-vented sec tion. Each…
908.2 Horizontal Wet Venting for a Bathroom Group. ¶
908.2 Horizontal Wet Venting for a Bathroom Group. A bathroom group located on the same floor level shall be permitted to be vented by a horizontal wet vent where all of the conditions of Section 908.2.1 through Section 908.2.5 are met. 908.2.1 Vent Connection. The dry vent connection to the wet vent shall be an individual vent for the bidet, shower, or bathtub. One or two vented lavatory(s) shall be permitted to serve as a wet vent for a bathroom group. Only one wet-vented fixture drain or trap arm shall discharge upstream of the dry-vented fixture drain connection. Dry vent connections to…
909.0 Special Venting for Island Fixtures. ¶
909.0 Special Venting for Island Fixtures.
909.1 General. Traps for island sinks and similar equipment ¶
909.1 General. Traps for island sinks and similar equipment shall be roughed in above the floor and shall be permitted to be vented by extending the vent as high as possible, but not less than the drainboard height and then returning it downward and connecting it to the horizontal sink drain immediately downstream from the vertical fixture drain. The return vent shall be connected to the horizontal drain through a wyebranch fitting and shall, in addition, be provided with a foot vent taken off the vertical fixture vent by means of a wye branch immediately below the floor and extending to the…
910.0 Combination Waste and Vent Systems. ¶
910.0 Combination Waste and Vent Systems.
910.1 Where Permitted. ¶
910.1 Where Permitted. Combination waste and vent systems shall be permitted where structural conditions preclude the installation of conventional systems as otherwise prescribed by this code.
910.2 Approval. ¶
910.2 Approval. Construction documents for each combination waste and vent system shall first be approved by the Authority Having Jurisdiction before a portion of such system is installed.
910.3 Vents. Each combination waste and vent system, as ¶
910.3 Vents. Each combination waste and vent system, as defined in Chapter 2, shall be provided with a vent or vents adequate to ensure free circulation of air. A branch exceeding 15 feet (4572 mm) in length shall be separately vented in an approved manner. The area of a vent installed in a combination waste and vent system shall be not less than one-half the inside cross-sectional area of the drainpipe served. The vent connection shall be downstream of the uppermost fixture.
910.4 Connections and Size. Branches serving traps ¶
910.4 Connections and Size. Branches serving traps shall connect to the main line at an angle not exceeding 2 percent. Each waste pipe and each trap in such a system shall be not less than two pipe sizes exceeding the sizes required by Chapter 7 of this code, and not less than two pipe sizes exceeding a fixture tailpiece or connection.
910.5 Vertical Waste Pipe. No vertical waste pipe shall be ¶
910.5 Vertical Waste Pipe. No vertical waste pipe shall be used in such a system, except the tailpiece or connection between the outlet of a plumbing fixture and the trap. Such tailpieces or connections shall be as short as possible, and in no case shall exceed 2 feet (610 mm). Exception: Branch lines shall be permitted to have 45 degree (0.79 rad) vertical offsets.
910.6 Cleanouts. An accessible cleanout shall be installed ¶
910.6 Cleanouts. An accessible cleanout shall be installed in each vent for the combination waste and vent system. Cleanouts shall not be required on a wet-vented branch serving a single trap where the fixture tailpiece or connection is not less than 2 inches (50 mm) in diameter and provides ready access for cleaning through the trap.
910.7 Fixtures. No water closet or urinal shall be installed ¶
910.7 Fixtures. No water closet or urinal shall be installed on such a system. Other one, two, or three unit fixtures remotely located from the sanitary system and adjacent to a combination waste and vent system shall be permitted to be connected to such system in the conventional manner by means of waste and vent pipes of regular sizes, providing that the two pipe size increase required in Section 910.4 is based on the total fixture unit load connected to the system. See Appendix B of this code for explanatory notes on the design of combination waste and vent systems.
911.0 Circuit Venting. ¶
911.1 Circuit Vent Permitted. ¶
911.1 Circuit Vent Permitted. A maximum of eight flooroutlet water closets, showers, bathtubs, or floor drains con ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. VENTS nected to a horizontal branch shall be permitted to be circuit vented. Each trap arm shall connect horizontally to the horizontal branch being circuit vented in accordance with Table 1002.2. The horizontal branch shall be classified as a drain and a vent from the most downstream trap arm connection to the most upstream trap arm connection to the horizontal…
911.2 Circuit Vent Size and Connection. The circuit ¶
911.2 Circuit Vent Size and Connection. The circuit vent size shall be in accordance with Table 703.2 according to the number of circuit vented fixtures connected to the horizontal branch but shall be not less than 2 inches (50 mm) in diameter. The vent shall connect to the horizontal branch on the vertical between the two most upstream trap arms. The circuit vent pipe shall not receive the discharge of soil or waste. 911.2.1 Multiple Circuit Vents. When multiple circuit vents are interconnected according to Section 911.4.1, each individual circuit vent shall be sized according to Section…
911.3 Relief Vent. ¶
911.3 Relief Vent. A 2 inch (50 mm) relief vent shall be provided for circuit-vented horizontal branches receiving the discharge of four or more water closets when connecting to a drainage stack that receives the discharge of soil or waste from upper horizontal branches. 911.3.1 Connection and Installation. The relief vent shall connect to the horizontal branch between the stack and the most downstream trap arm of the circuit vent. The relief vent shall be installed on the vertical to the horizontal branch. 911.3.2 Fixture Drain. The relief vent is permitted to serve as a fixture drain.…
911.4 Slope and Size of Horizontal Branch. The vented ¶
911.4 Slope and Size of Horizontal Branch. The vented section of the horizontal branch shall be uniformly sloped and not more than 1 inch per foot (83.3 mm/m). The entire length of the vented section of the horizontal branch shall be sized for the total drainage discharge to the branch according to Table 703.2. 911.4.1 Multiple Circuit-Vented Branches. Circuitvented horizontal branches are permitted to be connected together. Each group of a maximum of eight fixtures shall be considered a separate circuit vent and shall be in accordance with Section 911.4.1.1 and Section 911.4.1.2. 911.4.1.1…
911.5 Additional Fixtures. ¶
911.5 Additional Fixtures. Fixtures, other than the circuitvented fixtures, are permitted to discharge to the horizontal branch drain. Such fixtures shall be located on the same floor as the circuit-vented fixtures and shall be either individually or common vented.
912.0 Engineered Vent System. ¶
912.1 General. The design and sizing of a vent system shall ¶
912.1 General. The design and sizing of a vent system shall be permitted to be determined by accepted engineering practices. The system shall be designed by a registered design professional and approved in accordance with Section 301.5.
912.2 Minimum Requirements. ¶
912.2 Minimum Requirements. An engineered vent system shall provide protection of the trap seal in accordance with Section 901.3. 192 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE CHAPTER 10 - TRAPS AND INTERCEPTORS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.) Adopting…
1001.0 General. ¶
1001.1 Applicability. ¶
1001.1 Applicability. This chapter shall govern the materials, design, and installation of traps and interceptors.
1001.2 Where Required. ¶
1001.2 Where Required. Each plumbing fixture shall be separately trapped by an approved type of liquid seal trap. This section shall not apply to fixtures with integral traps. Not more than one trap shall be permitted on a trap arm. Food waste disposers installed with a set of restaurant, commercial, or industrial sinks shall be connected to a separate trap. Each domestic clothes washer and each laundry sink shall be connected to a separate and independent trap, except that a trap serving a laundry sink shall also be permitted to receive the waste from a clothes washer set adjacent to it. The…
1002.0 Traps Protected by Vent Pipes. ¶
1002.0 Traps Protected by Vent Pipes.
1002.1 Vent Pipes. Each plumbing fixture trap, except as ¶
1002.1 Vent Pipes. Each plumbing fixture trap, except as otherwise provided in this code, shall be protected against siphonage, backpressure, and air circulation shall be assured throughout the drainage system using a vent pipe installed in accordance with the requirements of this code.
1002.2 Fixture Traps. ¶
1002.2 Fixture Traps. Each fixture trap shall have a protecting vent so located that the developed length of the trap arm from the trap weir to the inner edge of the vent shall be within the distance given in Table 1002.2 but in no case less than two times the diameter of the trap arm.
1002.3 Change of Direction. ¶
1002.3 Change of Direction. A trap arm shall be permitted to change direction without the use of a cleanout where such change of direction does not exceed 90 degrees (1.57 rad). Horizontal changes in the direction of trap arms shall be in accordance with Section 706.3. Exception: For trap arms, 3 inches (80 mm) in diameter and larger, the change of direction shall not exceed 135 degrees (2.36 rad) without the use of a cleanout.
1002.4 Vent Pipe Opening. The vent pipe opening from ¶
1002.4 Vent Pipe Opening. The vent pipe opening from soil or waste pipe, except for water closets and similar fixtures, shall not be below the weir of the trap.
1003.0 Traps – Described. ¶
1003.1 General Requirements. Each trap, except for ¶
1003.1 General Requirements. Each trap, except for traps within an interceptor or similar device shall be selfcleaning. Traps for bathtubs, showers, lavatories, sinks, laun dry sinks, floor drains, urinals, drinking fountains, dental units, and similar fixtures shall be of standard design, weight and shall be of ABS, cast-brass, cast-iron, lead, PP, PVC, or other approved material. An exposed and readily accessible drawn-copper alloy tubing trap, not less than 17 B & S Gauge (0.045 inch) (1.143 mm), shall be permitted to be used on fixtures discharging domestic sewage. Exception s : (1)…
1003.2 Slip Joint Fittings. A maximum of one approved ¶
1003.2 Slip Joint Fittings. A maximum of one approved slip joint fitting shall be permitted to be used on the outlet side of a trap, and no tubing trap shall be installed without a listed tubing trap adapter. Listed plastic trap adapters shall be permitted to be used to connect listed metal tubing traps.
1003.3 Size. The size (nominal diameter) of a trap for a ¶
1003.3 Size. The size (nominal diameter) of a trap for a given fixture shall be sufficient to drain the fixture rapidly but in no case less than nor more than one pipe size larger than given in Table 702.1. The trap shall be the same size as the trap arm to which it is connected. TABLE 1002.2 HORIZONTAL LENGTHS OF TRAP ARMS (EXCEPT FOR WATER CLOSETS AND SIMILAR FIXTURES) [1, 2, 3] For SI units: 1 inch = 25.4 mm Notes: 1 Maintain 1 ⁄ 4 inch per foot slope (20.8 mm/m). 2 The developed length between the trap of a water closet or similar fixture (measured from the face of the closet flange to…
1004.0 Traps. ¶
1004.1 Prohibited. No form of trap that depends for its seal ¶
1004.1 Prohibited. No form of trap that depends for its seal upon the action of movable parts shall be used. No trap that has concealed interior partitions, except those of plastic, glass, or similar corrosion-resisting material, shall be used. “S” traps, bell traps, and crown-vented traps shall be prohibited. No fixture shall be double trapped. Drum and bottle traps shall be installed for special conditions. No trap shall be installed without a vent, except as otherwise provided in this code.
1004.2 Movable Parts. Bladders, check valves or another ¶
1004.2 Movable Parts. Bladders, check valves or another type of devices with moveable parts shall be prohibited to serve as a trap.
1005.0 Trap Seals. ¶
1005.1 General. Each fixture trap shall have a liquid seal of ¶
1005.1 General. Each fixture trap shall have a liquid seal of not less than 2 inches (51 mm) and not more than 4 inches (102 mm), except where a deeper seal is found necessary by the Authority Having Jurisdiction. Traps shall be set true with respect to their liquid seals and, where necessary, they shall be protected from freezing.
1006.0 Floor Drain Traps. ¶
1006.1 General. Floor drains shall connect into a trap so ¶
1006.1 General. Floor drains shall connect into a trap so constructed that it can be readily cleaned and of a size to serve efficiently the purpose for which it is intended. The drain inlet shall be so located that it is in full view. Where subject to the reverse flow of sewage or liquid waste, such drains shall be equipped with an approved backwater valve.
1007.0 Trap Seal Protection. ¶
1007.1 General. ¶
1007.1 General. Floor drain or similar traps directly connected to the drainage system and subject to infrequent use shall be protected with a trap seal primer, except where not deemed necessary for safety or sanitation by the Authority Having Jurisdiction. Trap seal primers shall be accessible for maintenance.
1007.2 Trap Seal Primers. Potable water supply trap seal ¶
1007.2 Trap Seal Primers. Potable water supply trap seal primer valves shall comply with ASSE 1018. Drainage or electronic design type trap seal primer devices shall comply with ASSE 1044 or IAPMO PS 76.
1008.0 Building Traps. ¶
1008.1 General. Building traps shall not be installed except ¶
1008.1 General. Building traps shall not be installed except where required by the Authority Having Jurisdiction. Each building trap where installed shall be provided with a cleanout and with a relieving vent or fresh-air intake on the inlet side of the trap, which needs not be larger than one-half the diameter of the drain to which it connects. Such relieving vent or fresh-air intake shall be carried above grade and terminate in a screened outlet located outside the building.
1009.0 Interceptors (Clarifiers) and Separators. ¶
1009.0 Interceptors (Clarifiers) and Separators.
1009.1 Where Required. ¶
1009.1 Where Required. Interceptors (clarifiers) (including grease, oil, sand, solid interceptors, etc.) shall be required by the Authority Having Jurisdiction where they are necessary for the proper handling of liquid wastes containing grease, flammable wastes, sand, solids, acid or alkaline substances, or other ingredients harmful to the building drainage system, the public or private sewer, or to public or private sewage disposal. A list of acceptable interceptor standards is referenced in Table 1009.1. TABLE 1009.1 APPROVED INTERCEPTORS (CLARIFIERS) APPLICATIONSTANDARD ------ <br <br <br…
1009.2 Approval. ¶
1009.2 Approval. The size, type, and location of each interceptor (clarifier) or separator shall be approved by the Authority Having Jurisdiction. Except where otherwise specifically permitted, no wastes other than those requiring treatment or separation shall be discharged into an interceptor (clarifier).
1009.3 Design. ¶
1009.3 Design. Interceptors (clarifiers) for sand and similar heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal of not less than 6 inches (152 mm).
1009.4 Relief Vent. Interceptors (clarifiers) shall be so ¶
1009.4 Relief Vent. Interceptors (clarifiers) shall be so designed that they will not become air-bound where closed covers are used. Each interceptor (clarifier) shall be properly vented.
1009.5 Location. Each interceptor (clarifier) cover shall be ¶
1009.5 Location. Each interceptor (clarifier) cover shall be readily accessible for servicing and maintaining the interceptor (clarifier) in working and operating condition. The use of ladders or the removal of bulky equipment to service interceptors (clarifiers) shall constitute a violation of accessibility. Location of interceptors (clarifiers) shall be shown on the approved building plan.
1009.6 Maintenance of Interceptors. Interceptors shall ¶
1009.6 Maintenance of Interceptors. Interceptors shall be maintained in efficient operating condition by periodic removal of accumulated grease, scum, oil, or other floating substances and solids deposited in the interceptor.
1009.7 Discharge. ¶
1009.7 Discharge. The waste pipe from oil and sand interceptors shall discharge as approved by the Authority Having Jurisdiction.
1010.0 Slaughterhouses, Packing Establishments, ¶
1010.0 Slaughterhouses, Packing Establishments, etc.
1010.1 General. A fish, fowl, and animal slaughterhouse or ¶
1010.1 General. A fish, fowl, and animal slaughterhouse or establishment; a fish, fowl, and meat packing or curing establishment; a soap factory, tallow-rendering, fat-rendering, and a hide-curing establishment shall be connected to and shall drain or discharge into an approved grease interceptor (clarifier). TABLE 1009.1 APPROVED INTERCEPTORS (CLARIFIERS) 196 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. TRAPS AND INTERCEPTORS
1010.2 Meat and Poultry Processing Plants. [AGR] ¶
1010.2 Meat and Poultry Processing Plants. [AGR] 1010.2.1 Drainage and Plumbing Systems. Drainage and plumbing systems shall meet the require- ments of Section 724.0. 1010.2.1.1 Each floor drain shall be equipped with a deep-seal trap. 1010.2.2 The plumbing shall be installed so as to prevent sewage from backing up and flooding the floor. Exception: Floor drains in areas not regularly washed down will be acceptable with deep-seal traps, provided that such drains are connected to secondary drainage systems discharging into a safe sink or basin (air gap) that is properly trapped and vented, and…
1010.3 Collection Centers and Facilities. [AGR] All ¶
1010.3 Collection Centers and Facilities. [AGR] All drains shall be properly installed with adequate deep-sealed traps of the conventional “P,” “U” or “S” type and vents.
1010.4 Horse Meat and Pet Food Establishments. ¶
1010.4 Horse Meat and Pet Food Establishments. [AGR] There shall be an efficient drainage and plumbing system for the establishment and premises. All drains and gut- ters shall be installed with traps and vents approved by the Department.
1010.5 Draining and Plumbing. [AGR] There shall be ¶
1010.5 Draining and Plumbing. [AGR] There shall be an efficient drainage and plumbing system for the plant and premises. 1010.5.1 Drainage and Gutters. All drains and gut- ters shall be properly installed with approved traps and vents. The drainage and plumbing system must permit the quick runoff of all water from plant buildings, and of surface water around the plant on the premises, and all such water shall be disposed of in such a manner as to prevent a nuisance or health hazard. 1010.5.2 Sewage and Plant Waste. The sewer sys- tem have adequate slope and capacity to remove readily all…
1011.0 Minimum Requirements for Auto Wash Racks. ¶
1011.0 Minimum Requirements for Auto Wash Racks.
1011.1 General. A private or public wash rack or floor or ¶
1011.1 General. A private or public wash rack or floor or slab used for cleaning machinery or machine parts shall be adequately protected against storm or surface water and shall drain or discharge into an approved interceptor (clarifier).
1012.0 Commercial and Industrial Laundries. ¶
1012.0 Commercial and Industrial Laundries.
1012.1 General. Laundry equipment in commercial and ¶
1012.1 General. Laundry equipment in commercial and industrial buildings that do not have integral strainers shall discharge into an interceptor having a wire basket or similar device that is removable for cleaning and that will prevent passage into the drainage system of solids [1] ⁄ 2 of an inch (12.7 mm) or larger in maximum dimensions, such as string, rags, buttons, or other solid materials detrimental to the public sewerage system.
1013.0 Bottling Establishments. ¶
1013.1 General. Bottling plants shall discharge their process ¶
1013.1 General. Bottling plants shall discharge their process wastes into an interceptor that will provide for the separation of broken glass or other solids, before discharging liquid wastes into the drainage system.
1014.0 Grease Interceptors. ¶
1014.1 General. Where it is determined by the Authority ¶
1014.1 General. Where it is determined by the Authority Having Jurisdiction that waste pretreatment is required, an approved type of grease interceptor(s) shall comply with ASME A112.14.3, ASME A112.14.4, CSA B481, ANSI/CAN/IAPMO Z1001, PDI G-101, or PDI G-102, and sized in accordance with Section 1014.2.1 or Section 1014.3.6, shall be installed in accordance with the manufacturer’s installation instructions to receive the drainage from fixtures or equipment that produce grease-laden waste. Grease-laden waste fixtures shall include, but not be limited to, sinks and drains, such as floor…
1014.2 Hydromechanical Grease Interceptors. ¶
1014.2 Hydromechanical Grease Interceptors. Plumbing fixtures or equipment connected to a Type A and B hydromechanical grease interceptor shall discharge through an approved type of vented flow control installed in a readily accessible and visible location. Flow control devices shall be designed and installed so that the total flow through such device or devices shall at no time be greater than the rated flow of the connected grease interceptor. No flow control device having adjustable or removable parts shall be approved. The vented flow control device shall be located such that no system…
1014.3 Gravity Grease Interceptors. Required gravity ¶
1014.3 Gravity Grease Interceptors. Required gravity grease interceptors shall comply with the provisions of Section 1014.3.1 through Section 1014.3.7. 1014.3.1 General. The provisions of this section shall apply to the design, construction, installation, and testing of commercial kitchen gravity grease interceptors. 1014.3.2 Waste Discharge Requirements. Waste discharge in establishments from fixtures and equipment For SI units: 1 inch = 25.4 mm, 1 gallon per minute = 0.06 L/s, 1 gallon = 3.785 L 198 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other…
1015.0 FOG (Fats, Oils, and Greases) Disposal Sys- ¶
1015.0 FOG (Fats, Oils, and Greases) Disposal Sys- tem.
1015.1 Purpose. The purpose of this section is to provide ¶
1015.1 Purpose. The purpose of this section is to provide the necessary criteria for the sizing, application, and installation of FOG disposal systems designated as a pretreatment or discharge water quality compliance strategy. TABLE 1014.3.6 GRAVITY GREASE INTERCEPTOR SIZING ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. TRAPS AND INTERCEPTORS
1015.2 Components, Materials, and Equipment. FOG ¶
1015.2 Components, Materials, and Equipment. FOG disposal systems, including components, materials, and equipment necessary for the proper function of the system, shall comply with ASME A112.14.6.
1015.3 Sizing and Installation. FOG disposal systems ¶
1015.3 Sizing and Installation. FOG disposal systems shall be sized and installed in accordance with the manufac turer’s installation instructions.
1015.4 Performance. FOG disposal systems shall produce ¶
1015.4 Performance. FOG disposal systems shall produce an effluent quality not to exceed 5.84 grains per gallon (gr/gal) (100 mg/L) FOG.
1015.5 [OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors ¶
1015.5 [OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors shall not be installed in food preparation area of kitchens.
1015.6 [OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors ¶
1015.6 [OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors shall be installed outside of the kitchen area in location affording ease of maintenance and servicing.
1016.0 Sand Interceptors. ¶
1016.1 Discharge. Where the discharge of a fixture or drain ¶
1016.1 Discharge. Where the discharge of a fixture or drain contains solids or semi-solids heavier than water that would be harmful to a drainage system or cause a stoppage within the system, the discharge shall be through a sand interceptor. Multiple floor drains shall be permitted to discharge into one sand interceptor.
1016.2 Authority Having Jurisdiction. Sand interceptors ¶
1016.2 Authority Having Jurisdiction. Sand interceptors are required where the Authority Having Jurisdiction deems it advisable to have a sand interceptor to protect the drainage system.
1016.3 Construction and Size. Sand interceptors shall be ¶
1016.3 Construction and Size. Sand interceptors shall be built of brick or concrete, prefabricated coated steel, or other watertight material. The interceptor shall have an interior baffle for full separation of the interceptor into two sections. The outlet pipe shall be the same size as the inlet pipe of the sand interceptor, the minimum being 3 inches (80 mm), and the baffle shall have two openings of the same diameter as the outlet pipe and at the same invert as the outlet pipe. These openings shall be staggered so that there cannot be a straight line flow between the inlet pipe and the…
1016.4 Separate Use. Sand and similar interceptors for ¶
1016.4 Separate Use. Sand and similar interceptors for every solid shall be so designed and located as to be readily accessible for cleaning, shall have a water seal of not less than 6 inches (152 mm), and shall be vented.
1017.0 Oil and Flammable Liquid Interceptors. ¶
1017.0 Oil and Flammable Liquid Interceptors.
1017.1 Interceptors Required. ¶
1017.1 Interceptors Required. Repair garages and gasoline stations with grease racks or grease pits, and factories that have oily, flammable, or both types of wastes as a result of manufacturing, storage, maintenance, repair, or testing processes, shall be provided with an oil or flammable liquid interceptor. Floor drains in such locations shall be connected directly to oil and flammable liquid interceptors.
1017.2 Interceptor Design Alternatives. Oil interceptors ¶
1017.2 Interceptor Design Alternatives. Oil interceptors shall comply with IAPMO IGC 183 or be in accordance with Section 1017.3 through Section 1017.4.
1017.3 Interceptor Details. ¶
1017.3 Interceptor Details. Oil and flammable liquid interceptors shall be in accordance with the following: (1) The separation or vapor compartment shall be independently vented to the outer air. Where two or more separation or vapor compartments are used, each shall be vented to the outer air or shall be permitted to connect to a header that is installed at a minimum of 6 inches (152 mm) above the spill line of the lowest floor drain and vented independently to the outer air. (2) The minimum size of a flammable vapor vent shall be not less than 2 inches (50 mm), and, where vented through a…
1017.4 Design of Interceptors. ¶
1017.4 Design of Interceptors. Each manufactured interceptor that is rated shall be stamped or labeled by the manufacturer with an indication of its full discharge rate in gpm (L/s). The following shall apply: (1) The full discharge rate to such an interceptor shall be determined at full flow. Each interceptor shall be rated equal to or greater than the incoming flow and shall be provided with an overflow line to an underground tank. (2) Interceptors not rated by the manufacturer shall have a depth of not less than 2 feet (610 mm) below the invert of the discharge drain. The outlet opening…
1101.0 General. ¶
1101.1 Applicability. ¶
1101.1 Applicability. This chapter shall govern the materials, design, and installation of storm water drainage systems.
1101.2 Where Required. Roofs, paved areas, yards, courts, ¶
1101.2 Where Required. Roofs, paved areas, yards, courts, courtyards, vent shafts, light wells, or similar areas having rainwater, shall be drained into a separate storm sewer system, or into a combined sewer system where a separate storm sewer system is not available, or to some other place of disposal satisfactory to the Authority Having Jurisdiction. In the case of one- and two-family dwellings, storm water shall be permitted to be discharged on flat areas, such as streets or lawns, so long as the storm water shall flow away from the building and away from adjoining property, and shall not…
1101.3 Storm Water Drainage to Sanitary Sewer Pro- ¶
1101.3 Storm Water Drainage to Sanitary Sewer Pro- hibited. Storm water shall not be drained into sewers intended for sanitary drainage.
1101.4 Material Uses. Pipe, tube, and fittings conveying ¶
1101.4 Material Uses. Pipe, tube, and fittings conveying rainwater shall be of such materials and design as to perform their intended function to the satisfaction of the Authority Having Jurisdiction. Conductors within a vent or shaft shall be of cast-iron, galvanized steel, wrought iron, copper, copper alloy, lead, Schedule 40 ABS DWV, Schedule 40 PVC DWV, stainless steel 304 or 316L [stainless steel 304 pipe and fittings shall not be installed underground and shall be kept not less than 6 inches (152 mm) aboveground], or other approved materials, and changes in direction shall be in…
1101.5 Expansion Joints Required. Expansion joints or ¶
1101.5 Expansion Joints Required. Expansion joints or sleeves shall be provided where warranted by temperature variations or physical conditions.
1101.6 Subsoil Drains. Subsoil drains shall be provided ¶
1101.6 Subsoil Drains. Subsoil drains shall be provided around the perimeter of buildings having basements, cellars, crawl spaces, or floors below grade. Such subsoil drains shall be permitted to be positioned inside or outside of the footing, shall be of perforated or open-jointed approved drain tile or pipe, not less than 3 inches (80 mm) in diameter, and shall be laid in gravel, slag, crushed rock, approved [3] ⁄ 4 of an inch (19.1 mm) crushed, recycled glass aggregate, or other approved porous material with not less than 4 inches (102 mm) surrounding the pipe. Filter media shall be…
1101.7 Building Subdrains. Building subdrains located ¶
1101.7 Building Subdrains. Building subdrains located below the public sewer level shall discharge into a sump or receiving tank, the contents of which shall be automatically lifted and discharged into the drainage system as required for building sumps.
1101.8 Areaway Drains. Open subsurface space adjacent ¶
1101.8 Areaway Drains. Open subsurface space adjacent to a building, serving as an entrance to the basement or cellar of a building, shall be provided with a drain or drains. The areaway drains shall be not less than 2 inches (50 mm) in diameter for areaways at a maximum of 100 square feet (9.29 m [2] ) in area, and shall be discharged in the manner provided for subsoil drains not serving continuously flowing springs or groundwater (see Section 1101.6.1). Areaways exceeding 100 square feet (9.29 m [2] ) shall not drain into subsoil drains. The drains for areaways exceeding 100 square feet…
1101.9 Window Areaway Drains. Window areaways at a ¶
1101.9 Window Areaway Drains. Window areaways at a maximum of 10 square feet (0.93 m [2] ) in area shall be permitted to discharge to the subsoil drains through a 2 inch (50 mm) diameter pipe. However, window areaways exceeding 10 square feet (0.93 m [2] ) in area shall be handled in the manner provided for entrance areaways (see Section 1101.8).
1101.10 Filling Stations and Motor Vehicle Washing ¶
1101.10 Filling Stations and Motor Vehicle Washing Establishments. Public filling stations and motor vehicle washing establishments shall have the paved area sloped toward sumps or gratings within the property lines. Curbs not less than 6 inches (152 mm) high shall be placed where required to direct water to gratings or sumps.
1101.11 Paved Areas. Where the occupant creates surface ¶
1101.11 Paved Areas. Where the occupant creates surface water drainage, the sumps, gratings, or floor drains shall be piped to a storm drain or an approved water course.
1101.12 Roof Drainage. Roof drainage shall comply with ¶
1101.12 Roof Drainage. Roof drainage shall comply with Section 1101.12.1 and Section 1101.12.2. 1101.12.1 Primary Roof Drainage. Roof areas of a building shall be drained by roof drains or gutters. The location and sizing of drains and gutters shall be coordinated with the structural design and pitch of the roof. Unless otherwise required by the Authority Having Jurisdiction, roof drains, gutters, vertical conductors or leaders, and horizontal storm drains for primary drainage shall be sized based on a storm of 60 minutes duration and 100 year return period. Refer to Table D 101.1 (in…
1101.13 Cleanouts. Cleanouts for building storm drains ¶
1101.13 Cleanouts. Cleanouts for building storm drains shall comply with the requirements of Section 719.0 of this code. 1101.13.1 Rain Leaders and Conductors. Rain leaders and conductors connected to a building storm sewer shall have a cleanout installed at the base of the leader or conductor before it connects to the horizontal drain.
1101.14 Rainwater Sumps. Rainwater sumps serving ¶
1101.14 Rainwater Sumps. Rainwater sumps serving “public use” occupancy buildings shall be provided with dual pumps arranged to function alternately in the case of overload or mechanical failure. Pumps rated 600 V or less shall comply with UL 778 and shall be installed in accordance with the manufacturer’s installation instructions.
1101.15 Traps on Storm Drains and Leaders. Leaders ¶
1101.15 Traps on Storm Drains and Leaders. Leaders and storm drains, where connected to a combined sewer, shall be trapped. Floor and area drains connected to a storm drain shall be trapped. Exception: Traps shall not be required where roof drains, rain leaders, and other inlets are at locations permitted under Section 906.0, Vent Termination. 1101.15.1 Where Not Required. No trap shall be required for leaders or conductors that are connected to a sewer carrying storm water exclusively. 1101.15.2 Trap Size. Traps, where installed for individual conductors, shall be the same size as the…
1101.16 Leaders, Conductors, and Connections. ¶
1101.16 Leaders, Conductors, and Connections. Leaders or conductors shall not be used as soil, waste, or vent pipes nor shall soil, waste, or vent pipes be used as leaders or conductors. 1101.16.1 Protection of Leaders. Leaders installed along alleyways, driveways, or other locations where exposed to damage shall be protected by metal guards, recessed into the wall, or constructed from the ferrous pipe. 1101.16.2 Combining Storm with Sanitary Drainage. The sanitary and storm drainage system of a building shall be entirely separate, except where a combined sewer is used, in which case the…
1102.0 Roof Drains. ¶
1102.1 Applications. Roof drains shall be constructed of ¶
1102.1 Applications. Roof drains shall be constructed of aluminum, cast-iron, copper alloy of not more than 15 percent zinc, leaded nickel bronze, stainless steel, ABS, PVC, polypropylene, polyethylene, or nylon and shall comply with ASME A112.3.1 or ASME A112.6.4.
1102.2 Dome Strainers Required. Roof drains shall have ¶
1102.2 Dome Strainers Required. Roof drains shall have domed strainers. Exception: Roof drain strainers for use on sun decks, parking decks, and similar areas that are normally serviced and maintained, shall be permitted to be of the flat surface type. Such roof drain strainers shall be level with the deck.
1102.3 Roof Drain Flashings. The connection between ¶
1102.3 Roof Drain Flashings. The connection between the roof and roof drains that pass through the roof and into the interior of the building shall be made watertight by the use of proper flashing material. 1102.3.1 Lead Flashing. Where lead flashing material is used, it shall be not less than 4 pounds per square foot (lb/ft [2] ) (19 kg/m [2] ). 1102.3.2 Copper Flashing. Where copper flashing material is used, it shall be not less than 12 ounces per square foot (oz/ft [2] ) (3.7 kg/m [2] ).
1103.0 Size of Leaders, Conductors, and Storm ¶
1103.0 Size of Leaders, Conductors, and Storm Drains.
1103.1 Vertical Conductors and Leaders. ¶
1103.1 Vertical Conductors and Leaders. Vertical conductors and leaders shall be sized by the maximum projected roof area and Table 1103.1.
1103.2 Size of Horizontal Storm Drains and Sewers. ¶
1103.2 Size of Horizontal Storm Drains and Sewers. The size of building storm drains, or building storm sewers or their horizontal branches shall be based on the maximum projected roof or paved area to be handled and Table 1103.2.
1103.3 Size of Roof Gutters. The size of semi-circular ¶
1103.3 Size of Roof Gutters. The size of semi-circular gutters shall be based on the maximum projected roof area and Table 1103.3.
1103.4 Side Walls Draining onto a Roof. ¶
1103.4 Side Walls Draining onto a Roof. Where vertical walls project above a roof to permit storm water to drain into the roof area below, the adjacent roof area shall be permitted to be computed from Table 1103.1 as follows: (1) For one wall – add 50 percent of the wall area to the roof area figures. (2) For two adjacent walls of equal height – add 35 percent of the total wall areas. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. STORM DRAINAGE Col1Col2TABLE 1103.1 SIZING ROOF DRAINS, LEADERS, AND VERTICAL RAINWATER…
1104.0 Values for Continuous Flow. ¶
1104.1 General. ¶
1104.1 General. Where there is a continuous or semi-continuous discharge into the building storm drain or building storm sewer, as from a pump, ejector, air-conditioning plant, or similar device, 1 gpm (0.06 L/s) of such discharge shall be computed as being equivalent to 24 square feet (2.2 m [2] ) of roof area, based upon a rate of rainfall of 4 inches per hour (in/h) (102 mm/h).
1105.0 Controlled-Flow Roof Drainage. ¶
1105.0 Controlled-Flow Roof Drainage.
1105.1 Application. Instead of sizing the storm drainage ¶
1105.1 Application. Instead of sizing the storm drainage system in accordance with Section 1103.0, the roof drainage shall be permitted to be sized by controlled flow and storage of the storm water on the roof, provided the following conditions are met: (1) The water from a 25-year frequency storm shall not be stored on the roof exceeding 24 hours. (2) During the storm, the water depth on the roof shall not exceed the depths specified in Table 1105.1(1). (3) Not less than two drains shall be installed in roof areas of 10 000 square feet (929 m [2] ) or less, and not less than one additional…
1105.2 Setback Roofs. Drains on setback roofs shall be ¶
1105.2 Setback Roofs. Drains on setback roofs shall be permitted to be connected to the controlled-flow drainage systems provided: (1) The setback is designed for storing water, or (2) The square footage of the setback drainage area is converted as outlined in Section 1105.0 to gpm, and the storm-water pipe sizes in the controlled-flow system are based on the sum of the loads. (3) The branch from each of the roof drains that are not provided with controlled flow shall be sized in accordance with Table 1103.1.
1106.0 Engineered Storm Drainage System. ¶
1106.0 Engineered Storm Drainage System.
1106.1 General. The design and sizing of a storm drainage ¶
1106.1 General. The design and sizing of a storm drainage system shall be permitted to be determined by accepted engineering practices. The system shall be designed by a regis TABLE 1105.1(1) CONTROLLED-FLOW MAXIMUM ROOF WATER DEPTH For SI units: 1 inch = 25.4 mm - Vertical measurement from the roof surface at the drain to the highest point of the roof surface served by the drain, ignoring a local depression immediately adjacent to the drain. TABLE 1105.1(2) DISTANCE OF SCUPPER BOTTOMS ABOVE ROOF For SI units: 1 inch = 25.4 mm - Vertical measurement from the roof surface at the drain to the…
1106.2 Siphonic Roof Drainage Systems. The design of ¶
1106.2 Siphonic Roof Drainage Systems. The design of a siphonic roof drainage system shall comply with ASPE/ANSI 45.
1106.3 Siphonic Roof Drains. Siphonic roof drains shall ¶
1106.3 Siphonic Roof Drains. Siphonic roof drains shall comply with ASME A112.6.9.
1107.0 Testing. ¶
1107.1 Testing Required. New building storm drainage ¶
1107.1 Testing Required. New building storm drainage systems and parts of existing systems that have been altered, extended, or repaired shall be tested in accordance with Section 1107.2.1 or Section 1107.2.2 to disclose leaks and defects.
1107.2 Methods of Testing Storm Drainage Systems. ¶
1107.2 Methods of Testing Storm Drainage Systems. Except for outside leaders and perforated or open-jointed drain tile, the piping of storm drain systems shall be tested upon completion of the rough piping installation by water or air, except that plastic pipe shall not be tested with air, and proved tight. The Authority Having Jurisdiction shall be permitted to require the removal of cleanout plugs to ascertain whether the pressure has reached parts of the system. One of the following test methods shall be used in accordance with Section 1107.2.1 through Section 1107.2.3. 1107.2.1 Water…
1201.0 General. ¶
1201.1 Applicability. The regulations of this chapter shall ¶
1201.1 Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane, other than service pipe. Fuel oil piping systems connected to oil- burning equipment shall be installed in accordance with NFPA 31. Fuel oil piping systems connected to internal com- bustion engines and gas turbines shall be installed in accor- dance with NFPA 37.
1202.0 Coverage of Piping System. ¶
1202.1 General. Coverage of piping systems shall extend ¶
1202.1 General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet…
1202.2 Piping System Requirements. Requirements for ¶
1202.2 Piping System Requirements. Requirements for piping systems shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. [NFPA 54:1.1.1.1(E)]
1202.3 Applications. This chapter shall not apply to the ¶
1202.3 Applications. This chapter shall not apply to the following items: (1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system. (2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural purposes. (3) Raw material (feedstock) applications except for piping to special atmosphere generators. (4) Oxygen-fuel gas cutting and welding systems. (5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and…
1203.0 Inspection. ¶
1203.1 Inspection Notification. Upon completion of the ¶
1203.1 Inspection Notification. Upon completion of the installation, alteration, or repair of gas piping, and prior to the use thereof, the Authority Having Jurisdiction shall be notified that such gas piping is ready for inspection.
1203.2 Excavation. ¶
1203.2 Excavation. Excavations required for the installation of underground piping shall be kept open until the piping has been inspected and approved. Where such piping is covered or concealed before such approval, it shall be exposed upon the direction of the Authority Having Jurisdiction.
1203.3 Type of Inspections. ¶
1203.3 Type of Inspections. The Authority Having Jurisdiction shall make the following inspections and either shall approve that portion of the work as completed or shall notify the permit holder wherein the same fails to be in accordance with this code. 1203.3.1 Rough Piping Inspection. This inspection shall be made after gas piping authorized by the permit has been installed and before such piping has been covered or concealed or fixture or appliance has been attached thereto. This inspection shall include a determination that the gas piping size, material, and installation meet the…
1203.4 Inspection Waived. In cases where the work ¶
1203.4 Inspection Waived. In cases where the work authorized by the permit consists of a minor installation of additional piping to piping already connected to a gas meter, the preceding inspections shall be permitted to be waived at the discretion of the Authority Having Jurisdiction. In this event, the Authority Having Jurisdiction shall make such inspection as deemed advisable to be assured that the work has been performed in accordance with the intent of this code.
1204.0 Certificate of Inspection. ¶
1204.1 Issuance. Whereupon final piping inspection, the ¶
1204.1 Issuance. Whereupon final piping inspection, the installation is found to be in accordance with the provisions of this code, a certificate of inspection shall be permitted to be issued by the Authority Having Jurisdiction.
1204.2 Gas Supplier. A copy of the certificate of such final ¶
1204.2 Gas Supplier. A copy of the certificate of such final piping inspection shall be issued to the serving gas supplier supplying gas to the premises.
1204.3 Unlawful. ¶
1204.3 Unlawful. It shall be unlawful for a serving gas supplier, or person is furnishing gas, to turn on or cause to be turned on, a fuel gas or a gas meter or meters, until such certificate of final inspection, as herein provided, has been issued.
1205.0 Authority to Render Gas Service. ¶
1205.0 Authority to Render Gas Service.
1205.1 Authorized Personnel. It shall be unlawful for a ¶
1205.1 Authorized Personnel. It shall be unlawful for a person, firm, or corporation, excepting an authorized agent or employee of a person, firm, or corporation engaged in the business of furnishing or supplying gas and whose service pipes supply or connect with the particular premises, to turn on or reconnect gas service in or on a premises where and when gas service is, at the time, not being rendered.
1205.2 Outlets. It shall be unlawful to turn on or connect gas ¶
1205.2 Outlets. It shall be unlawful to turn on or connect gas in or on the premises unless outlets are securely connected to gas appliances or capped or plugged with screw joint fittings.
1206.0 Authority to Disconnect. ¶
1206.1 Disconnection. The Authority Having Jurisdiction ¶
1206.1 Disconnection. The Authority Having Jurisdiction or the serving gas supplier is hereby authorized to disconnect gas piping or appliance or both that shall be found not to be in accordance with the requirements of this code or that are found defective and in such condition as to endanger life or property.
1206.2 Notice. Where such disconnection has been made, a ¶
1206.2 Notice. Where such disconnection has been made, a notice shall be attached to such gas piping or appliance or both that shall state the same has been disconnected, together with the reasons thereof.
1206.3 Capped Outlets. It shall be unlawful to remove or ¶
1206.3 Capped Outlets. It shall be unlawful to remove or disconnect gas piping or gas appliance without capping or plugging with a screw joint fitting, the outlet from which said pipe or appliance was removed. Outlets to which gas appliances are not connected shall be left capped and gastight on a piping system that has been installed, altered, or repaired. Exception: Where an approved listed quick-disconnect device is used.
1207.0 Temporary Use of Gas. ¶
1207.1 General. Where temporary use of gas is desired, and ¶
1207.1 General. Where temporary use of gas is desired, and the Authority Having Jurisdiction deems the use necessary, a permit shall be permitted to be issued for such use for a period not to exceed that designated by the Authority Having Jurisdiction, provided that such gas piping system otherwise is in accordance with the requirements of this code regarding material, sizing, and safety.
1208.0 Gas Piping System Design, Materials, and ¶
1208.0 Gas Piping System Design, Materials, and Components.
1208.1 Installation of Piping System. Where required ¶
1208.1 Installation of Piping System. Where required by the Authority Having Jurisdiction, a piping sketch or plan shall be prepared before proceeding with the installation. The plan shall show the proposed location of piping, the size of different branches, the various load demands, and the location of the point of delivery. [NFPA 54:5.1.1] 1208.1.1 Addition to Existing System. When additional appliances are being connected to a gas piping system, the existing piping shall be checked to determine whether it has adequate capacity. If the capacity of the system is determined to be inadequate…
1208.2 Interconnections Supplying Separate Users. ¶
1208.2 Interconnections Supplying Separate Users. Where two or more meters, or two or more service regulators where meters are not provided, are located on the same premises and supply separate users, the gas piping systems shall not be interconnected on the outlet side of the meters or service regulators. [NFPA 54:5.2.1] 1208.2.1 Interconnections for Standby Fuels. Where a supplementary gas for standby use is connected downstream from a meter or a service regulator where a meter is not provided, equipment to prevent backflow shall be installed. A three-way valve installed to admit the…
1208.3 Sizing of Gas Piping Systems. ¶
1208.3 Sizing of Gas Piping Systems. Gas piping systems shall be of such size and so installed as to provide a supply of gas sufficient to meet the maximum demand and supply gas to each appliance inlet at not less than the minimum supply pressure required by the appliance. [NFPA 54:5.3.1] 1208.3.1 Maximum Gas Demand. The volumetric flow rate of gas to be provided shall be the sum of the maximum input of the appliances served. The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2000 feet (610 m). [NFPA 54:5.3.2.1 – 5.3.2.2] Where the…
1208.4 Maximum Operating Pressure in Buildings. ¶
1208.4 Maximum Operating Pressure in Buildings. The maximum operating pressure for any piping systems located inside buildings shall not exceed 5 psi (34 kPa) unless one or more of the following conditions are met: (1) The piping joints are welded or brazed. (2) The piping is joined by fittings listed to ANSI LC 4/CSA 6.32 and installed according to the manufacturer’s installation instructions. (3) The piping joints are flanged and all pipe-to-flange connections are made by welding or brazing. (4) The piping is located in a ventilated chase or otherwise enclosed for protection against…
1208.5 Acceptable Piping Materials and Joining ¶
1208.5 Acceptable Piping Materials and Joining Methods. Materials used for piping systems shall comply with the requirements of Section 1208.5.1 through Section 1208.5.6.3. {NFPA 54:5.5.1.1} 1208.5.1 Used Materials. Pipe, fittings, valves, or other materials shall not be used again unless they are free of foreign materials and have been ascertained to be adequate for the service intended. [NFPA 54:5.5.1.2] 1208.5.2 Metallic Pipe. Metallic pipe shall be in accordance with the Section 1208.5.2.1 through Section 1208.5.2.4. 1208.5.2.1 Cast Iron. Cast-iron pipe shall not be used. [NFPA…
1208.6 Gas Meters. Gas meters shall be selected for the ¶
1208.6 Gas Meters. Gas meters shall be selected for the maximum expected pressure and permissible pressure drop. [NFPA 54:5.6.1] 1208.6.1 Location. Gas meters shall be located in ventilated spaces readily accessible for examination, reading, replacement, or necessary maintenance. [NFPA 54:5.6.2.1] » » » » » » » » (a) The operation shall be performed on systems having operating pressures of 5 psi (34 kPa) or less. (b) The operation shall be performed by the gas supplier or their designated representative. (c) The drilling and tapping operation shall be performed in accordance with written…
1208.7 Gas Pressure Regulators. ¶
1208.7 Gas Pressure Regulators. A line pressure regulator shall be installed where the gas supply pressure exceeds the maximum allowable inlet pressure of the appliance served. [NFPA 54:5.7.1] 1208.7.1 Listing. Line pressure regulators shall be listed in accordance with CSA/ANSI Z21.80/CSA 6.22 where the outlet pressure is set to 2 psi (14 kPa) or less. [NFPA 54:5.7.2] 1208.7.2 Location. The gas pressure regulator shall be accessible for servicing. [NFPA 54:5.7.3] 1208.7.3 Regulator Protection. Pressure regulators shall be protected against physical damage. [NFPA 54:5.7.4] 1208.7.4 Regulator…
1208.8 Overpressure Protection Required. Where the ¶
1208.8 Overpressure Protection Required. Where the serving gas supplier delivers gas at a pressure greater than 2 psi (14 kPa) for piping systems serving appliances designed to operate at a gas pressure of 14 inches water column (3.5 kPa) or less, overpressure protection devices shall be installed. Piping systems serving equipment designed to operate at inlet pressures greater than 14 inches water column (3.5 kPa) shall be equipped with overpressure protection devices as required by the appliance manufacturer’s installation instructions. [NFPA 54:5.8.1] « « « « « «
1208.9 Overpressure Protection Devices. ¶
1208.9 Overpressure Protection Devices. Overpressure protection devices shall be one of the following: (1) Pressure relief valve. (2) Monitor regulator. (3) Series regulator installed upstream from the line regulator and set to continuously limit the pressure on the inlet of the line regulator to the maximum values specified by Section 1208.10 or less. (4) Automatic shutoff device installed in series with the line pressure regulator and set to shut off when the pressure on the downstream piping system reaches the maximum values specified by Section 1208.10 or less. This device shall be…
1208.10 Pressure Limitation Requirements. ¶
1208.10 Pressure Limitation Requirements. Where piping systems serving appliances designed to operate with a gas supply pressure of 14 inches water column (3.5 kPa) or less are required to be equipped with overpressure protection by Section 1208.8, each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance to 2 psi (14 kPa) or less upon a failure of the line pressure regulator. [NFPA 54:5.8.2.1] 1208.10.1 Overpressure Protection Required. Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14…
1208.11 Backpressure Protection. Protective devices ¶
1208.11 Backpressure Protection. Protective devices shall be installed as close to the equipment as practical where the design of equipment connected is such that air, oxygen, or standby gases could be forced into the gas supply system. Gas and air combustion mixers incorporating double diaphragm “zero” or “atmosphere” governors or regulators shall require no further protection unless connected directly to compressed air or oxygen at pressures of 5 psi (34 kPa) or more. [NFPA 54:5.9.1.1 – 5.9.1.2] 1208.11.1 Protective Devices. Protective devices shall include but not be limited to the…
1208.12 Low-Pressure Protection. A protective device ¶
1208.12 Low-Pressure Protection. A protective device shall be installed between the meter and the appliance or equipment if the operation of the appliance or equipment is such that it could produce a vacuum or a dangerous reduction in gas pressure at the meter. Such protective devices include, but are not limited to, mechanical, diaphragm-operated, or electrically operated low-pressure shutoff valves. [NFPA 54:5.10]
1208.13 Shutoff Valves. Shutoff valves shall be selected in ¶
1208.13 Shutoff Valves. Shutoff valves shall be selected in accordance with Table 1208.13. Shutoff valves of size 1 inch (25 mm) National Pipe Thread and smaller shall be listed and labeled. Where used outdoors, such use shall be in accordance with the manufacturer’s recommendation. [NFPA 54:5.11]
1208.14 Expansion and Flexibility. Piping systems shall ¶
1208.14 Expansion and Flexibility. Piping systems shall be designed to prevent failure from thermal expansion or contraction. [NFPA 54:5.13.1] 1208.14.1 Special Local Conditions. Where local conditions include earthquake, tornado, unstable ground, or flood hazards, special consideration shall be given to increased strength and flexibility of piping supports and connections. [NFPA 54:5.13.2]
1208.15 Pressure Regulator and Pressure Control ¶
1208.15 Pressure Regulator and Pressure Control Venting. The venting of the atmospheric side of diaphragms in line pressure regulators, gas appliance regulators, and gas pressure limit controls shall be in accordance with all of the following: (1) An independent vent pipe to the outdoors, sized in accordance with the device manufacturer’s instructions, shall be provided where the location of a device is such that a discharge of fuel gas will cause a hazard. For devices other than appliance regulators, vents are not required to be independent where the vents are connected to a common manifold…
1209.0 Excess Flow Valve. ¶
1209.1 General. Where automatic excess flow valves are ¶
1209.1 General. Where automatic excess flow valves are installed, they shall be listed in accordance with ANSI Z21.93/CSA 6.30 and shall be sized and installed in accor dance with the manufacturers’ instructions. [NFPA 54:5.12]
1210.0 Gas Piping Installation. ¶
1210.1 Piping Underground. Underground gas piping ¶
1210.1 Piping Underground. Underground gas piping shall be installed with sufficient clearance from any other underground structure to avoid contact therewith, to allow maintenance, and to protect against damage from proximity to other structures. Underground plastic piping shall be installed with sufficient clearance or shall be insulated from any source of heat so as to prevent the heat from impairing the serviceability of the pipe. [NFPA 54:7.1.1.1 – 7.1.1.2] 1210.1.1 Cover Requirements. Underground piping systems shall be installed with a minimum of 12 inches (305 mm) of cover. The…
1210.2 CSST Piping Systems. CSST piping systems shall ¶
1210.2 CSST Piping Systems. CSST piping systems shall be installed in accordance with this code and the manufacturer’s installation instructions. [NFPA 54:7.1.8]
1210.3 Installation of Aboveground Piping. Piping ¶
1210.3 Installation of Aboveground Piping. Piping installed aboveground shall comply with all of the following: (1) Piping shall be securely supported and located where it will be protected from physical damage. (2) Where passing through an exterior wall, the piping shall also be protected from corrosion by coating or wrapping with an inert material approved for such applications. (3) The piping shall be sealed around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents. (4) Where piping is encased in a protective pipe sleeve, the…
1210.4 Concealed Piping in Buildings. Gas piping in ¶
1210.4 Concealed Piping in Buildings. Gas piping in concealed locations shall be installed in accordance with this section. [NFPA 54:7.3.1] TABLE 1210.3.5.1 SUPPORT OF PIPING [NFPA 54: TABLE 7.2.6.2] For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. FUEL GAS PIPING 1210.4.1 Connections. Where gas piping is to be concealed, connections shall be of the following type: (1) Pipe fittings such as elbows, tees, couplings, and right/left nipple/couplings. (2) Joining tubing by brazing…
1210.5 Piping in Vertical Chases. Where gas piping ¶
1210.5 Piping in Vertical Chases. Where gas piping exceeding 5 psi (34 kPa) is located within vertical chases in accordance with Section 1208.4(4), the requirements of Section 1210.5.1 through Section 1210.5.3 shall apply. [NFPA 54:7.4] 1210.5.1 Pressure Reduction. Where pressure reduction is required in branch connections for compliance with Section 1208.4, such reduction shall take place either inside the chase or immediately adjacent to the outside wall of the chase. Regulator venting and downstream overpressure protection shall comply with Section 1208.7.4 and Section 1208.8 through…
1210.6 Gas Pipe Turns. Changes in direction of gas pipe ¶
1210.6 Gas Pipe Turns. Changes in direction of gas pipe shall be made by the use of fittings, factory bends, or field bends. [NFPA 54:7.5] 1210.6.1 Metallic Pipe. Metallic pipe bends shall comply with the following: (1) Bends shall be made only with bending tools and procedures intended for that purpose. (2) All bends shall be smooth and free from buckling, cracks, or other evidence of mechanical damage. (3) The longitudinal weld of the pipe shall be near the neutral axis of the bend. (4) Pipe shall not be bent through an arc of more than 90 degrees. (5) The inside radius of a bend shall be…
1210.7 Drips and Sediment Traps. For other than dry gas ¶
1210.7 Drips and Sediment Traps. For other than dry gas conditions, a drip shall be provided at any point in the line of pipe where condensate could collect. Where required by the Authority Having Jurisdiction or the serving gas supplier, a drip shall also be provided at the outlet of the meter. This drip shall be installed so as to constitute a trap wherein an accumulation of condensate shuts off the flow of gas before it runs back into the meter. [NFPA 54:7.6.1] 1210.7.1 Location of Drips. All drips shall be installed only in such locations that they are readily accessible to permit…
1210.8 Outlets. Outlets shall be located and installed in ¶
1210.8 Outlets. Outlets shall be located and installed in accordance with the following requirements: (1) The outlet fittings or piping shall be securely fastened in place. (2) Outlets shall not be located behind doors. (3) Outlets shall be located far enough from floors, walls, patios, slabs, and ceilings to permit the use of wrenches without straining, bending, or damaging the piping. (4) The unthreaded portion of gas piping outlets shall extend not less than 1 inch (25.4 mm) through finished ceilings or indoor or outdoor walls. (5) The unthreaded portion of gas piping outlets shall extend…
1210.9 Manual Gas Shutoff Valves. An accessible gas ¶
1210.9 Manual Gas Shutoff Valves. An accessible gas shutoff valve shall be provided upstream of each gas pressure regulator. Where two gas pressure regulators are installed in series in a single gas line, a manual valve shall not be required at the second regulator. [NFPA 54:7.8.2] 1210.9.1 Accessibility of Gas Valves. System shutoff valves shall be readily accessible for operation and installed so as to be protected from physical damage. System shutoff valves shall be marked with a metal tag or other permanent means attached by the installing agency so that the gas piping systems supplied…
1210.10 Prohibited Devices. Devices shall not be placed ¶
1210.10 Prohibited Devices. Devices shall not be placed within the interior of gas piping or fittings where such devices reduce the cross-sectional area or otherwise obstruct the free flow of gas, except where allowance in the piping system design has been made for such devices. [NFPA 54:7.9]
1210.11 Systems Containing Gas-Air Mixtures Out- ¶
1210.11 Systems Containing Gas-Air Mixtures Out- side the Flammable Range. Where gas-air mixing machines are employed to produce mixtures above or below the flammable range, they shall be provided with stops to prevent adjustment of the mixture to within or approaching the flammable range. [NFPA 54:7.10]
1210.12 Systems Containing Flammable Gas-Air ¶
1210.12 Systems Containing Flammable Gas-Air Mixtures. Systems containing flammable gas-air mixtures shall be in accordance with Section 1210.12.1 through Section 1210.12.6. 1210.12.1 Required Components. A central premix system with a flammable mixture in the blower or compressor shall consist of the following components: (1) Gas-mixing machine in the form of an automatic gas-air proportioning device combined with a downstream blower or compressor. (2) Flammable mixture piping, minimum Schedule 40. (3) Automatic firecheck(s). ), Copyright © 2025 IAPMO, and may not be used for any other…
1211.0 Electrical Bonding and Grounding. ¶
1211.0 Electrical Bonding and Grounding.
1211.1 Pipe and Tubing Other than CSST. ¶
1211.1 Pipe and Tubing Other than CSST. Each aboveground portion of a gas piping system, other than CSST, that is likely to become energized shall be electrically continuous and bonded to an effective ground-fault current path. Gas piping, other than CSST, shall be considered to be bonded when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supplying that appliance. [NFPA 54:7.12.1]
1211.2 Bonding of CSST Gas Piping. CSST gas piping ¶
1211.2 Bonding of CSST Gas Piping. CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall be electrically continuous and bonded to the electrical service grounding electrode system or, where provided, lightning protection grounding electrode system. [NFPA 54:7.12.2] 1211.2.1 Bonding Jumper Connection. The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting. [NFPA 54:7.12.2.1] 1211.2.2 Bonding Jumper Size. The bonding jumper shall not be smaller than 6 AWG copper wire or equivalent. [NFPA 54:7.12.2.2] 1211.2.3 Bonding Jumper…
1211.3 Arc-Resistant Jacketed CSST. CSST listed with ¶
1211.3 Arc-Resistant Jacketed CSST. CSST listed with an arc resistant jacket or coating system in accordance with CSA/ANSI LC 1/CSA 6.26 shall be electrically continuous and bonded to an effective ground fault current path. Where any CSST component of a piping system does not have an arcresistant jacket or coating system, the bonding requirements of Section 1211.2 shall apply. Arc-resistant jacketed CSST shall be considered to be bonded when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supplying that appliance. [NFPA 54:7.12.3]
1211.4 Prohibited Use. Gas piping shall not be used as a ¶
1211.4 Prohibited Use. Gas piping shall not be used as a grounding conductor or electrode. [NFPA 54:7.12.4.1]
1211.5 Lightning Protection System. Where a lightning ¶
1211.5 Lightning Protection System. Where a lightning protection system is installed, the bonding of the gas piping shall be in accordance with NFPA 780. [NFPA 54:7.12.5]
1211.6 Electrical Circuits. ¶
1211.6 Electrical Circuits. Electrical circuits shall not utilize gas piping or components as conductors. Exception: Low-voltage (50 V or less) control circuits, ignition circuits, and electronic flame detection device circuits shall be permitted to make use of piping or components as a part of an electric circuit. [NFPA 54:7.13]
1211.7 Electrical Connections. All electrical connections ¶
1211.7 Electrical Connections. All electrical connections between wiring and electrically operated control devices in a piping system shall conform to the requirements of Califor- nia Electrical Code . [NFPA 54:7.14.1] 1211.7.1 Safety Control. Any essential safety control depending on electric current as the operating medium shall be of a type that shuts off (fail safe) the flow of gas in the event of current failure. [NFPA 54:7.14.2]
1211.8 Earthquake-Actuated Gas Shutoff Valves. ¶
1211.8 Earthquake-Actuated Gas Shutoff Valves. Earthquake-actuated gas shutoff valves designed to auto- matically shut off the gas at the location of the valve in the event of a seismic disturbance and certified by the State Architect as conforming to California Code of Regulations, Title 24, Part 12, Chapter 12-16-1, shall be provided for buildings when such installation is required by local ordi- nance. Earthquake-actuated gas shutoff valves which have not been certified by the State Architect shall be prohibited in buildings open to the public under mandatory installation by local…
1212.0 Appliance and Equipment Connections to ¶
1212.0 Appliance and Equipment Connections to Building Piping.
1212.1 Connecting Appliances and Equipment. ¶
1212.1 Connecting Appliances and Equipment. Appliances and equipment shall be connected to the building piping in compliance with Section 1212.6 through Section 1212.8 by one of the following: (1) Rigid metallic pipe and fittings. (2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. (3) A connector for gas appliances listed in accordance with ANSI Z21.24/CSA 6.10. The connector shall be used in accordance with the manufacturer’s installation instructions and shall be in the same room as the appliance. Only one connector shall be…
1212.4 Injection (Bunsen) Burners. Injection (Bunsen) ¶
1212.4 Injection (Bunsen) Burners. Injection (Bunsen) burners used in laboratories and educational facilities shall be permitted to be connected to the gas supply by an unlisted hose. [NFPA 54:9.6.3]
1212.5 Connection of Portable and Mobile Industrial ¶
1212.5 Connection of Portable and Mobile Industrial Gas Appliances. Where portable industrial appliances or appliances requiring mobility or subject to vibration are connected to the building gas piping system by the use of a flexible hose, the hose shall be suitable and safe for the conditions under which it can be used. [NFPA 54:9.6.4.1] 1212.5.1 Swivel Joints or Couplings. Where industrial appliances requiring mobility are connected to the rigid piping by the use of swivel joints or couplings, the swivel joints or couplings shall be suitable for the service required, and only the minimum…
1212.6 Appliance Shutoff Valves and Connections. ¶
1212.6 Appliance Shutoff Valves and Connections. Each appliance connected to a piping system shall have an accessible, approved manual shutoff valve with a nondisplaceable valve member, or a listed gas convenience outlet. Appliance shutoff valves and convenience outlets shall serve a single appliance only. [NFPA 54:9.6.5] The shutoff valve shall be located within 6 feet (1829 mm) of the appliance it serves. [NFPA 54:9.6.5.1] Where a connector is used, the valve shall be installed upstream of the connector. A union or flanged connection shall be provided downstream from the valve to permit…
1212.7 Quick-Disconnect Devices. Quick-disconnect ¶
1212.7 Quick-Disconnect Devices. Quick-disconnect devices used to connect appliances to the building piping shall be listed in accordance with ANSI Z21.41/CSA 6.9. Where installed indoors, an approved manual shutoff valve with a nondisplaceable valve member shall be installed upstream of the quick-disconnect device. [NFPA 54:9.6.6.1 – 9.6.6.2] » » Materials addressed in Section 1212.1(2), Section 1212.1(3), Section 1212.1(4), Section 1212.1(5), and Section 1212.1(6) shall not be installed through an opening in an appliance housing, cabinet, or casing, unless the tubing or connector is…
1212.2 Suspended Low-Intensity Infrared Tube ¶
1212.2 Suspended Low-Intensity Infrared Tube Heaters. Suspended low-intensity infrared tube heaters shall be connected to the building piping system with a connector listed for the application in accordance with ANSI Z21.24/CSA 6.10 as follows: (1) The connector shall be installed in accordance with the tube heater installation instructions and shall be in the same room as the appliance. (2) Only one connector shall be used per appliance. [NFPA 54:9.6.1.5]
1212.3 Use of Nonmetallic Gas Hose Connectors. ¶
1212.3 Use of Nonmetallic Gas Hose Connectors. Listed gas hose connectors shall be used in accordance with the manufacturer’s installation instructions and in accordance with Section 1212.3.1 and Section 1212.3.2. [NFPA 54:9.6.2] 1212.3.1 Indoor. Indoor gas hose connectors shall be used only to connect laboratory, shop, and ironing appliances requiring mobility during operation and installed in accordance with the following: (1) An appliance shutoff valve shall be installed where the connector is attached to the building piping. (2) The connector shall be of minimum length and shall not…
1212.8 Gas Convenience Outlets. Appliances shall be ¶
1212.8 Gas Convenience Outlets. Appliances shall be permitted to be connected to the building piping by means of a listed gas convenience outlet, in conjunction with a listed appliance connector, installed in accordance with the manufacturer’s installation instructions. Gas convenience outlets shall be listed in accordance with CSA/ANSI Z21.90/CSA 6.24 and installed in accor dance with the manufacturer’s installation instructions. [NFPA 54:9.6.7]
1212.9 Sediment Trap. ¶
1212.9 Sediment Trap. Where a sediment trap is not incorporated as a part of the appliance, a sediment trap shall be installed downstream of the appliance shutoff valve as close to the inlet of the appliance as practical at the time of appliance installation. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet, as illustrated in Figure 1212.9, or another device recognized as an effective sediment trap. Illuminating appliances, gas ranges, clothes dryers, decorative appliances for installation in vented fireplaces, gas fireplaces, and outdoor cooking…
1212.10 Installation of Piping. Piping shall be installed in ¶
1212.10 Installation of Piping. Piping shall be installed in a manner not to interfere with inspection, maintenance, or servicing of the appliances. [NFPA 54:9.6.9]
1212.11 Liquefied Petroleum Gas Facilities and Pip- ¶
1212.11 Liquefied Petroleum Gas Facilities and Pip- ing. Liquefied petroleum gas facilities shall be in accordance with NFPA 58.
1213.0 Pressure Testing, Inspection, and Purging. ¶
1213.0 Pressure Testing, Inspection, and Purging.
1213.1 Piping Installations. ¶
1213.1 Piping Installations. Prior to acceptance and initial operation, all piping installations shall be visually inspected and pressure tested to determine that the materials, design, fabrication, and installation practices comply with the requirements of this code. [NFPA 54:8.1.1.1] 1213.1.1 Inspection Requirements. Inspection shall consist of visual examination, during or after manufacture, fabrication, assembly, or pressure tests. [NFPA 54:8.1.1.2] 1213.1.2 Repairs and Additions. Where repairs or additions are made following the pressure test, the affected piping shall be tested. Minor…
1213.2 Test Preparation. Test preparation shall comply ¶
1213.2 Test Preparation. Test preparation shall comply with Section 1213.2.1 through Section 1213.2.6. 1213.2.1 Pipe Joints. Pipe joints, including welds, shall be left exposed for examination during the test. Exception: Covered or concealed pipe end joints that have been previously tested in accordance with this code. [NFPA 54:8.1.3.1] 1213.2.2 Expansion Joints. Expansion joints shall be provided with temporary restraints, if required, for the additional thrust load under test. [NFPA 54:8.1.3.2] 1213.2.3 Appliances and Equipment. Appliances and equipment that are not to be included in the…
1213.3 Test Pressure. This inspection shall include an air, ¶
1213.3 Test Pressure. This inspection shall include an air, CO 2, or nitrogen pressure test, at which time the gas piping shall stand a pressure of not less than 10 psi (69 kPa) gauge pressure. Test pressures shall be held for a length of time satisfactory to the Authority Having Jurisdiction but in no case less than 15 minutes with no perceptible drop in pressure. For welded piping, and for piping carrying gas at pressures in excess of 14 inches water column pressure (3.5 kPa), the test pressure shall be not less than 60 psi (414 kPa) and shall be continued for a length of time satisfactory…
1213.4 Detection of Leaks and Defects. ¶
1213.4 Detection of Leaks and Defects. The piping system shall withstand the test pressure specified without showing any evidence of leakage or other defects. Any reduction of test pressures as indicated by pressure gauges shall be deemed to indicate the presence of a leak unless such reduction can be readily attributed to some other cause. [NFPA 54:8.1.5.1] 1213.4.1 Detecting Leaks. The leakage shall be located by means of an approved gas detector, a noncorrosive leak detection fluid, or other approved leak detection methods. [NFPA 54:8.1.5.2] 1213.4.2 Repair or Replace. Where leakage or…
1213.5 Piping System Leak Test. Leak checks using fuel ¶
1213.5 Piping System Leak Test. Leak checks using fuel gas shall be permitted in piping systems that have been pressure-tested in accordance with Section 1213.0 through Section 1213.4.2. [NFPA 54:8.2.1] 1213.5.1 Turning Gas On. During the process of turning gas on into a system of new gas piping, the entire system shall be inspected to determine that there are no open fittings or ends and that all valves at unused outlets are closed and plugged or capped. [NFPA 54:8.2.2] 1213.5.2 Leak Check. Immediately after the gas is turned on into a new system or into a system that has been initially…
1213.6 Purging Requirements. The purging of piping ¶
1213.6 Purging Requirements. The purging of piping shall be in accordance with Section 1213.6.1 through Section 1213.6.3. [NFPA 54:8.3] 1213.6.1 Piping Systems Required to be Purged Outdoors. The purging of piping systems shall be in accordance with Section 1213.6.1.1 through Section 1213.6.1.5 where the piping system meets either of the following: (1) The design operating gas pressure is greater than 2 psig (14 kPa). (2) The piping being purged contains one or more sections of pipe or tubing meeting the size and length criteria of Table 1213.6.1. [NFPA 54:8.3.1] TABLE 1213.6.1 SIZE AND…
1214.0 Required Gas Supply. ¶
1214.1 General. The following regulations shall comply ¶
1214.1 General. The following regulations shall comply with this section and Section 1215.0, shall be the standard for the installation of gas piping. Natural gas regulations and tables are based on the use of a gas having a specific gravity of 0.60 and for undiluted liquefied petroleum gas, having a specific gravity of 1.50. Where gas of a different specific gravity is to be delivered, the specific gravity conversion factors provided by the serving gas supplier shall be used in sizing piping systems from the pipe sizing tables in this chapter.
1214.2 Volume. The hourly volume of gas required at each ¶
1214.2 Volume. The hourly volume of gas required at each piping outlet shall be taken as not less than the maximum hourly rating as specified by the manufacturer of the appliance or appliances to be connected to each such outlet.
1214.3 Gas Appliances. Where the gas appliances to be ¶
1214.3 Gas Appliances. Where the gas appliances to be installed have not been specified, Table 1208.3.1 shall be permitted to be used as a reference to estimate requirements of typical appliances. To obtain the cubic feet per hour (m [3] /h) of gas required, divide the input of the appliances by the average Btu (kW•h) heating value per cubic foot (m [3] ) of the gas. The average Btu (kW•h) per cubic foot (m [3] ) of the gas in the area of the installation shall be permitted to be obtained from the serving gas supplier.
1214.4 Size of Piping Outlets. ¶
1214.4 Size of Piping Outlets. The size of the supply piping outlet for a gas appliance shall be not less than [1] ⁄ 2 of an inch in diameter (15 mm). The size of a piping outlet for a mobile home shall be not less than [3] ⁄ 4 of an inch in diameter (20 mm). ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. FUEL GAS PIPING
1215.0 Required Gas Piping Size. ¶
1215.1 Pipe Sizing Methods. Where the pipe size is to be ¶
1215.1 Pipe Sizing Methods. Where the pipe size is to be determined using any of the methods in Section 1215.1.1 through Section 1215.1.3, the diameter of each pipe segment shall be obtained from the pipe sizing tables in Section 1215.2 or from the sizing equations in Section 1215.3. [NFPA 54:6.1] 1215.1.1 Longest Length Method. The pipe size of each section of gas piping shall be determined using the longest length of piping from the point of delivery to the most remote outlet and the load of the section. [NFPA 54:6.1.1] (see calculation example in Figure 1215.1.1) 1215.1.2 Branch Length…
1215.2 Sizing of Gas Piping Systems. Sizing of piping ¶
1215.2 Sizing of Gas Piping Systems. Sizing of piping systems shall be in accordance with Section 1215.2.1 for natural gas piping systems and Section 1215.2.2 for propane piping systems. 1215.2.1 Natural Gas Piping Systems. Table 1215.2(1) through Table 1215.2(23) shall be used in conjunction with one of the methods described in Section 1215.1.1 through Section 1215.1.3 for piping materials other than non-corrugated stainless steel tubing. Section 1215.3 shall be used in conjunction with one of the methods described in Section 1215.1.1 through Section 1215.1.3 for non-corrugated stainless…
1215.3 Sizing Equations. The inside diameter of smooth ¶
1215.3 Sizing Equations. The inside diameter of smooth wall pipe or tubing shall be determined by Equation 1215.3(1), Equation 1215.3(2) and Table 1215.3 using the equivalent pipe length determined by the methods in Section 1215.1.1 through Section 1215.1.3. [NFPA 54:6.4] LOW-PRESSURE GAS FORMULA (LESS THAN 1.5 psi) [NFPA 54:6.4.1] [Equation 1215.3(1)] Q [0.381] D = 0.206 19.17 [(] Δ H ~~)~~ Cr x L Where: D = inside diameter of pipe, inches Q = input rate appliance(s), cubic feet per hour at 60 ˚ F and 30 inch mercury column L = equivalent length of pipe, feet Δ H = pressure drop, inches…
1215.4 Sizing of Piping Sections. To determine the size ¶
1215.4 Sizing of Piping Sections. To determine the size of each section of pipe in a system within the range of Table 1215.2(1) through Table 1215.2(36), proceed as follows: 234 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. FUEL GAS PIPING (1) Measure the length of the pipe from the gas meter location to the most remote outlet on the system. (2) Select the length in feet column and row showing the distance, or the next longer distance where the table does not give the exact length. (3)…
1215.5 Engineering Methods. For conditions other than ¶
1215.5 Engineering Methods. For conditions other than those covered by Section 1215.1, such as longer runs or greater gas demands, the size of each gas piping system shall be determined by standard engineering methods acceptable to the Authority Having Jurisdiction, and each such system shall be so designed that the total pressure drop between the meter or another point of supply and an outlet where full demand is being supplied to all outlets, shall be in accordance with the requirements of Section 1208.4.
1215.6 Variable Gas Pressure. Where the supply gas ¶
1215.6 Variable Gas Pressure. Where the supply gas pressure exceeds 5 psi (34.6 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane or is less than 6 inches (1.5 kPa) of water column, or where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier’s standard delivery pressure shall have prior verification from the gas supplier of the availability of the design pressure. ), Copyright © 2025 IAPMO,…
1301.0 General Requirements. ¶
1301.1 Applicability. ¶
1301.1 Applicability. This chapter applies to the special fixtures and systems in health care facilities; the special plumbing requirements for such facilities; and the installation, testing, and verification of Categories 1, 2, and 3 medical gas and medical vacuum piping systems, except as otherwise indicated in this chapter, from the central supply system to the station outlets or inlets in hospitals, clinics, and other health care facilities. Other plumbing in such facilities shall comply with other applicable sections of this code. For Category 3 medical gas systems, only oxygen and…
1301.2 Where Not Applicable. This chapter does not apply ¶
1301.2 Where Not Applicable. This chapter does not apply to the following except as otherwise addressed in this chapter: (1) Cylinder and container management, storage, and reserve requirements (2) Bulk supply systems (3) Electrical connections and requirements (4) Motor requirements and controls (5) Systems having nonstandard operating pressures (6) Waste anesthetic gas disposal (WAGD) systems (7) Surface-mounted medical gas rail systems (8) Breathing air replenishment (BAR) systems (9) Portable compressed gas systems (10)Medical support gas systems (11)Gas-powered device supply systems…
1301.3 Conflict of Requirements. The requirements of ¶
1301.3 Conflict of Requirements. The requirements of this chapter shall not be interpreted to conflict with the requirements of NFPA 99. For requirements of portions of medical gas and vacuum systems not addressed in this chapter or medical gas and vacuum systems beyond the scope of this chapter refer to NFPA 99.
1301.4 Where Required. Construction and equipment ¶
1301.4 Where Required. Construction and equipment requirements shall be applied only to new construction and new equipment, except as modified in individual sections of this chapter. {NFPA 99:1.3.2}
1301.5 Existing Systems. Only the altered, renovated, or ¶
1301.5 Existing Systems. Only the altered, renovated, or modernized portion of an existing system or individual component shall be required to meet the installation and equipment requirements stated in this code. If the alteration, renovation, or modernization adversely impacts the existing performance requirements of a system or component, additional upgrading shall be required. An existing system that is not in strict compliance with the provisions of this code shall be permitted to be continued in use, unless the Authority Having Jurisdiction has determined that such use constitutes a…
1302.0 Design Requirements. ¶
1302.1 Risk Categories. All activities, as well as systems ¶
1302.1 Risk Categories. All activities, as well as systems or equipment that are new or altered, shall be designed to meet Category 1 through Category 4 requirements, as detailed in this chapter. {NFPA 99:4.1} 1302.1.1 Processes and Operations. The health care facility’s governing body shall establish the processes and operations that are planned for the health care facility. [NFPA 99:4.2.1] 1302.1.1.1 Risk Categories. The governing body shall conduct risk assessments and shall determine risk categories based on the character of the processes and operations conducted in the health care…
1302.2 Patient Care Spaces. The health care facility’s ¶
1302.2 Patient Care Spaces. The health care facility’s governing body or its designee shall establish the following areas in accordance with the type of patient care anticipated (see definition of patient care space in Chapter 2): (1) Category 1 spaces (2) Category 2 spaces (3) Category 3 spaces (4) Category 4 spaces [NFPA 99:1.3.4.1]
1302.3 Anesthesia. It shall be the responsibility of the ¶
1302.3 Anesthesia. It shall be the responsibility of the health care facility’s governing body to designate anesthetizing locations. [NFPA 99:1.3.4.2]
1302.4 Wet Procedure Locations. ¶
1302.4 Wet Procedure Locations. It shall be the responsibility of the health care facility’s governing body to designate wet procedure locations. [NFPA 99:1.3.4.3]
1303.0 Health Care Facilities. ¶
1303.1 Drinking Fountain Control Valves. Drinking ¶
1303.1 Drinking Fountain Control Valves. Drinking fountain control valves shall be flush-mounted or fully recessed where installed in corridors or other areas where patients are transported on a gurney, bed, or wheelchair.
1303.2 Psychiatric Patient Rooms. Piping and drain ¶
1303.2 Psychiatric Patient Rooms. Piping and drain traps in psychiatric patient rooms shall be concealed. Fixtures and fittings shall be resistant to vandalism. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1303.3 Locations for Ice Storage. ¶
1303.3 Locations for Ice Storage. Ice makers or ice storage containers shall be located in nursing stations or similarly supervised areas to minimize potential contamination.
1303.4 Sterilizers and Bedpan Steamers. Sterilizers ¶
1303.4 Sterilizers and Bedpan Steamers. Sterilizers and bedpan steamers shall be installed in accordance with the manufacturer’s installation instructions and comply with Section 1303.4.1 and Section 1303.4.2. 1303.4.1 Drainage Connections. Sterilizers and bedpan steamers shall be connected to the sanitary drainage system through an air gap in accordance with Section 801.2. The size of indirect waste piping shall be not less than the size of the drain connection on the fixture. Each such indirect waste pipe shall not exceed 15 feet (4572 mm) in length and shall be separately piped to a…
1303.5 Aspirators. ¶
1303.5 Aspirators. Provisions for aspirators or other watersupplied suction devices shall be installed with the specific approval of the Authority Having Jurisdiction. Where aspirators are used for removing body fluids, they shall include a collection container to collect liquids and solid particles. Aspirators shall indirectly discharge to the sanitary drainage system through an air gap in accordance with Section 806.1. The potable water supply to an aspirator shall be protected by a vacuum breaker or equivalent backflow protection device in accordance with Section 603.5.9.
1303.6 Drains. ¶
1303.6 Drains. Drains shall be installed on dryers, aftercoolers, separators, and receivers.
1303.7 Clinical Sinks. Clinical sinks shall be installed in ¶
1303.7 Clinical Sinks. Clinical sinks shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 1303.7.1. 1303.7.1 Drainage Connection. Clinical sinks shall be directly connected to the sanitary drainage system and shall be provided with approved flushing devices installed in accordance with Section 413.1.
1303.8 Water Supply for Hospitals. Hospitals shall be ¶
1303.8 Water Supply for Hospitals. Hospitals shall be provided with not less than two approved potable water sources that are installed in such a manner as to prevent the interruption of water service.
1303.9 Work Performed in Occupied Healthcare ¶
1303.9 Work Performed in Occupied Healthcare Facilities. In existing, occupied, inpatient healthcare facilities, all plumbing systems installation and remodel work shall be performed by personnel certified in accordance with ASSE/IAPMO/ANSI 12010.
1304.0 Medical Gas and Medical Vacuum Piping Sys- ¶
1304.0 Medical Gas and Medical Vacuum Piping Sys- tems.
1304.1 General. ¶
1304.1 General. The installation of medical gas and medical vacuum piping systems shall comply with the requirements of this chapter. 1304.1.1 [OSHPD 1, 1R, 2, 3, 4 & 5] Medical gas sys- tems for health care facilities that are regulated by OSHPD (hospitals, skilled nursing facilities, and intermediate care facilities, licensed clinics, and correctional treatment cen- ters) shall be in accordance with NFPA 99, Standard for Health Care Facilities. See California Fire Code Refer- enced Standards (Chapter 80) for applicable version of the Standard. See California Building Code Table 1224.4.6.1…
1304.2 Certification of Systems. ¶
1304.2 Certification of Systems. Certification of medical gas and vacuum systems shall comply with the requirements of Section 1306.0.
1304.3 Construction Documents. Before a medical gas ¶
1304.3 Construction Documents. Before a medical gas or medical vacuum system is installed or altered in a hospital, medical facility, or clinic, duplicate construction documents shall be filed with the Authority Having Jurisdiction. Approval of the plans shall be obtained before issuance of a permit by the Authority Having Jurisdiction. 1304.3.1 Requirements. Construction documents shall show the following: (1) Plot plan of the site, drawn to scale, indicating the location of existing or new cylinder storage areas, property lines, driveways, and existing or proposed buildings. (2) Piping…
1304.4 Extent of Work. Construction documents submitted ¶
1304.4 Extent of Work. Construction documents submitted to the Authority Having Jurisdiction shall clearly indicate the nature and extent of the work proposed and shall show in detail that such work will be in accordance with the provisions of this chapter.
1304.5 Record. ¶
1304.5 Record. A record of as-built plans and valve identification records shall remain on the site.
1305.0 System Performance. ¶
1305.1 Required Operating Pressures. Medical gas and ¶
1305.1 Required Operating Pressures. Medical gas and vacuum systems shall be capable of delivering service in the pressure ranges listed in Table 1305.1. 276 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS TABLE 1305.1 STANDARD DESIGNATION COLORS AND OPERATING PRESSURES FOR GAS AND VACUUM SYSTEMS [NFPA 99: TABLE 5.1.11] GAS SERVICEABBREVIATED<brNAMECOLORS<br(BACKGROUND/ TEXT)STANDARD GAUGE<brPRESSURE ------------ Medical airMed…
1305.2 Minimum Flow Rates. Medical gas and vacuum ¶
1305.2 Minimum Flow Rates. Medical gas and vacuum systems shall be capable of supplying the flow rates listed in Table 1305.2.
1305.3 Minimum Station Outlets and Inlets. Station ¶
1305.3 Minimum Station Outlets and Inlets. Station outlets and inlets for medical gas and vacuum systems shall be provided as listed in Table 1305.3.
1306.0 System Certification. ¶
1306.1 Certification. ¶
1306.1 Certification. Prior to a medical gas or vacuum system being placed in service, such system shall be certified in accordance with Section 1306.2.
1306.2 Certification Tests. Certification tests, verified and ¶
1306.2 Certification Tests. Certification tests, verified and attested to by the certification agency, shall include the following: (1) Verifying in accordance with the installation requirements. (2) Testing and checking for leakage, correct zoning, and identification of control valves. (3) Checking for identification and labeling of pipelines, station outlets, and control valves. (4) Testing for cross-connection, flow rate, system pressure drop, and system performance. (5) Functional testing of pressure relief valves and safety valves. (6) Functional testing of sources of supply. (7)…
1306.3 Report Items. A report that includes the specific ¶
1306.3 Report Items. A report that includes the specific items addressed in Section 1306.2, and other information required by this chapter, shall be delivered to the Authority Having Jurisdiction prior to acceptance of the system.
1306.4 Components. Functioning of alarm components ¶
1306.4 Components. Functioning of alarm components shall be verified in accordance with the testing and monitoring requirements of the manufacturer and the Authority Having Jurisdiction. TABLE 1305.2 MINIMUM FLOW RATES (cubic feet per minute) MEDICAL SYSTEMFLOW RATE ------ <brOxygen0.71 CFM per outlet1 <brNitrous Oxide0.71 CFM per outlet1 <brMedical Compressed Air0.71 CFM per outlet1 <brNitrogen15 CFM free air per outlet <brVacuum1 SCFM per inlet2 <brCarbon Dioxide0.71 CFM per outlet1 <brHelium0.71 CFM per outlet For SI units: 1 cubic foot per minute (CFM) = 0.47 L/s Notes: 1 A room designed…
1307.0 Central Supply Systems. ¶
1307.1 Terms. ¶
1307.1 Terms. Where the terms medical gas or medical support gas occur, the provisions shall apply to all piped systems for oxygen, nitrous oxide, medical air, carbon dioxide, helium, nitrogen, instrument air, and mixtures thereof. Wherever the name of a specific gas service occurs, the provision shall apply only to that gas. [NFPA 99:5.1.1.3]
1307.2 Nature of Hazards of Gas and Vacuum Sys- ¶
1307.2 Nature of Hazards of Gas and Vacuum Sys- tems. Potential fire and explosion hazards associated with positive pressure gas central piping systems and medical–surgical vacuum systems shall be considered in the design, installation, testing, operation, and maintenance of these systems. [NFPA 99:5.1.2]
1307.3 Permitted Locations for Medical Gases. ¶
1307.3 Permitted Locations for Medical Gases. Central supply systems for oxygen, medical air, nitrous oxide, carbon dioxide, and all other patient medical gases shall be piped only to medical gas outlets complying with Section 1315.0, into areas where the gases will be used under the direction of licensed medical professionals for purposes congruent with the following: (1) Direct respiration by patients. (2) Clinical application of the gas to a patient, such as the use of an insufflator to inject carbon dioxide into patient body cavities during laparoscopic surgery and carbon dioxide used to…
1307.4 Materials. Materials used in central supply systems ¶
1307.4 Materials. Materials used in central supply systems shall meet the following requirements: (1) In those portions of systems intended to handle oxygen at gauge pressures greater than 350 pounds-force per square inch (psi) (2413 kPa), interconnecting hose shall contain no polymeric materials. (2) In those portions of systems intended to handle oxygen or nitrous oxide material, construction shall be compatible with oxygen under the temperatures and pressures to which the components can be exposed in the containment and use of oxygen, nitrous oxide, mixtures of these gases, or mixtures…
1308.0 Pressure-Regulating Equipment. ¶
1308.0 Pressure-Regulating Equipment.
1308.1 Where Required. Pressure-regulating equipment ¶
1308.1 Where Required. Pressure-regulating equipment shall be installed in the supply main upstream of the final linepressure valve. Where multiple piping systems for the same gas at different operating pressures are required, separate pressure-regulating equipment, relief valves, and source shutoff valves shall be provided for each pressure.
1308.2 Pressure Relief Valves. All pressure relief valves ¶
1308.2 Pressure Relief Valves. All pressure relief valves shall meet the following requirements: 278 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS (1) They shall be of brass, bronze, or stainless steel construction. (2) They shall be designed for the specific gas service. (3) They shall have a relief pressure setting not higher than the maximum allowable working pressure (MAWP) of the component with the lowest working pressure…
1308.3 Pressure-Relief Valve Requirements. Central ¶
1308.3 Pressure-Relief Valve Requirements. Central supply systems for positive pressure gases shall include one or more relief valves, all meeting the following requirements: (1) They shall be located between each final line regulator and the source valve. (2) They shall have a relief setting that is 50 percent above the normal system operating pressure, as indicated in Table 1305.1. [NFPA 99:5.1.3.5.6.4]
1309.0 Oxygen Concentrator Supply Units. ¶
1309.0 Oxygen Concentrator Supply Units.
1309.1 Oxygen Requirements. ¶
1309.1 Oxygen Requirements. Oxygen concentrator supply units for use with medical gas pipelines shall produce oxygen meeting the requirements of Oxygen 93 USP or Oxygen USP. [NFPA 99:5.1.3.9.1.1]
1309.2 Particulate Size. Output shall have less than or ¶
1309.2 Particulate Size. Output shall have less than or equal to 1.686 x 10 [-6] pounds per cubic yard (1 mg/m [3] ) of permanent particulates sized 1 micron or larger at normal atmospheric pressure. [NFPA 99:5.1.3.9.1.2]
1309.3 Suitability. Materials of construction on the air side ¶
1309.3 Suitability. Materials of construction on the air side of the oxygen concentrator unit shall be suitable for the service as determined by the manufacturer. [NFPA 99:5.1.3.9.1.3]
1309.4 Compatible Materials. Materials of construction ¶
1309.4 Compatible Materials. Materials of construction on the oxygen side of the oxygen concentrator unit shall comply with Section 1307.4. [NFPA 99:5.1.3.9.1.4]
1309.5 Oxygen Concentrator Components. ¶
1309.5 Oxygen Concentrator Components. The components that make up the oxygen concentrator unit shall be as follows: (1) The manufacturer of the concentrator unit shall be permitted to use such components and arrangement of such components as needed to produce oxygen complying with Section 1309.1 in the quantity as required by the facility, except where otherwise specifically defined in this code. (2) Air receivers and oxygen accumulators, where used, shall comply with Section VIII.1, “Unfired Pressure Vessels,” of the ASME Boiler and Pressure Vessels Code and be provided with overpressure…
1309.6 Supply Air Quality. ¶
1309.6 Supply Air Quality. The supply air to the concentrator(s) shall be of a quality to ensure the oxygen concentrator unit can produce oxygen complying with Section 1309.1 and shall not be subject to normally anticipated contamination (e.g., vehicle or other exhausts, gas leakage, discharge from vents, flooding). [NFPA 99:5.1.3.9.1.6]
1309.7 Electrical Components. The oxygen concentrator ¶
1309.7 Electrical Components. The oxygen concentrator supply unit and any associated electrical equipment shall be provided with, at a minimum, the following electrical components: (1) Either a disconnect switch for each major electrical component or a single disconnect that deactivates all electrical components in the concentrator unit. (2) Motor starting devices with overload protection for any component with an electrical motor over 2 hp (1.5 kW). [NFPA 99:5.1.3.9.1.7]
1309.8 Vent Valve. A vent valve shall be provided as follows: ¶
1309.8 Vent Valve. A vent valve shall be provided as follows: (1) Located on the source side of the concentrator outlet isolation valve to permit the operation of the oxygen concentrator unit for validation, calibration, and testing while the unit is isolated from the pipeline system. (2) Sized to allow for at least 25 percent of the oxygen concentrator unit flow. (3) Vented to a location compliant with Section 1309.8.1. [NFPA 99:5.1.3.9.1.8] 1309.8.1 Venting of Relief Valves. Indoor supply systems shall have all relief valves vented per Section 1308.2(4) through Section 1308.2(9). [NFPA…
1309.9 Valved Sample Port. A DN8 (NPS 1/4) valved ¶
1309.9 Valved Sample Port. A DN8 (NPS 1/4) valved sample port shall be provided near the oxygen concentration monitor sensor connection for sampling of the gas from the oxygen concentrator unit. [NFPA 99:5.1.3.9.1.9]
1309.10 Suitable Filter. ¶
1309.10 Suitable Filter. At least one 0.1 micron filter suitable for oxygen service shall be provided at the outlet of the oxygen concentrator supply unit. [NFPA 99:5.1.3.9.1.10]
1309.11 Check Valve. A check valve shall be provided at ¶
1309.11 Check Valve. A check valve shall be provided at the outlet of the oxygen concentrator supply unit to prevent backflow into the oxygen concentrator supply unit and to allow service to the unit. [NFPA 99:5.1.3.9.1.11]
1309.12 Outlet Valve. An outlet valve shall be provided to ¶
1309.12 Outlet Valve. An outlet valve shall be provided to isolate all components of the oxygen concentrator from the pipeline with the following characteristics: (1) The valve shall have both manual and automatic actuation with visual indication of open or closed. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS (2) The valve shall close automatically whenever the oxygen concentrator unit is not producing oxygen of a concentration equal to that in Section…
1309.13 Oxygen Concentration Monitor. The oxygen ¶
1309.13 Oxygen Concentration Monitor. The oxygen concentrator supply unit shall be provided with an oxygen concentration monitor with the following characteristics: (1) The monitor shall be capable of monitoring 99 percent oxygen concentration with 1 percent accuracy. (2) The monitor shall continuously display the oxygen concentration and shall activate local alarm and master alarms per NFPA 99 when a concentration lower than 91 percent is observed. (3) The monitor shall continuously display the oxygen concentration. (4) It shall be permitted to insert the monitor into the pipeline without a…
1310.0 Category 1 Medical Air Central Supply Sys- ¶
1310.0 Category 1 Medical Air Central Supply Sys- tems.
1310.1 Quality of Medical Air. Medical air shall be ¶
1310.1 Quality of Medical Air. Medical air shall be required to have the following characteristics: (1) It shall be supplied from cylinders, bulk containers, or medical air compressor sources, or it shall be reconstituted from oxygen USP and oil-free, dry nitrogen NF. (2) It shall meet the requirements of medical air USP. (3) It shall have no detectable liquid hydrocarbons. (4) It shall have less than 25 ppm gaseous hydrocarbons. (5) It shall have equal to or less than 1.686 x 10 [-6] pounds per cubic yard (1 mg/m [3] ) of permanent particulates sized 1 micron or larger in the air at normal…
1310.2 Uses of Medical Air. Medical air sources shall be ¶
1310.2 Uses of Medical Air. Medical air sources shall be connected to the medical air distribution system only and shall be used only for air in the application of human respiration and calibration of medical devices for respiratory application. [NFPA 99:5.1.3.6.2]
1310.3 Medical Air Compressors. ¶
1310.3 Medical Air Compressors. Medical air compressors shall be installed in a well-lit, ventilated, and clean location and shall be accessible. The location shall be provided with drainage facilities in accordance with this code. The medical air compressor area shall be located separately from medical gas cylinder system sources, and shall be readily accessible for maintenance. 1310.3.1 Category 1 Medical Air Compressor. Medical air compressors shall be sufficient to serve the peak calculated demand with the largest single compressor out of service. In no case shall there be fewer than two…
1310.4 Medical Air Receivers. Receivers for medical air ¶
1310.4 Medical Air Receivers. Receivers for medical air shall meet the following requirements: (1) They shall be made of corrosion-resistant materials or otherwise be made corrosion resistant. (2) They shall comply with Section VIII.1, “Unfired Pressure Vessels,” of the ASME Boiler and Pressure Vessel Code. (3) They shall be equipped with a pressure relief valve, automatic drain, manual drain, sight glass, and pressure indi cator. (4) They shall be of a capacity sufficient to prevent the compressors from short-cycling. [NFPA 99:5.1.3.6.3.6]
1310.5 Valves. A medical air receiver(s) shall be provided ¶
1310.5 Valves. A medical air receiver(s) shall be provided with proper valves to allow the flow of compressed air to enter and exit out of separate receiver ports during normal operation and allow the receiver to be bypassed during service without shutting down the supply of medical air. [NFPA 99:5.1.3.6.3.9(D)]
1311.0 Compressor Intake. ¶
1311.1 Air Sources. Air sources for medical air compressors ¶
1311.1 Air Sources. Air sources for medical air compressors shall comply with Section 1311.2 through Section 1311.6. 280 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1311.2 Medical Air Compressor Source. The medical ¶
1311.2 Medical Air Compressor Source. The medical air compressors shall draw their air from a source of clean air. [NFPA 99:5.1.3.6.3.11(A)] If an air source equal to or better than outside air (e.g., air already filtered for use in operating room ventilating systems) is available, it shall be permitted to be used for the medical air compressors with the following provisions: (1) This alternate source of supply air shall be available on a continuous 24 hours-per-day, 7 day-per-week basis. (2) Ventilating systems having fans with motors or drive belts located in the airstream shall not be used…
1311.3 Air Intakes. ¶
1311.3 Air Intakes. Compressor intake piping shall be permitted to be made of materials and use a joining technique as permitted under Section 1319.0 and Section 1320.0. [NFPA 99:5.1.3.6.3.11(F)]
1311.4 Location. Medical air intakes shall be located as fol ¶
1311.4 Location. Medical air intakes shall be located as fol lows: (1) The medical air intake shall be located a minimum of 25 feet (7620 mm) from ventilating system exhausts, fuel storage vents, combustion vents, plumbing vents, vacuum and WAGD discharges, or areas that can collect vehicular exhausts or other noxious fumes. (2) The medical air intake shall be located a minimum of 20 feet (6096 mm) above ground level. (3) The medical air intake shall be located a minimum of 10 feet (3048 mm) from any door, window, or other opening in the building. [NFPA 99:5.1.3.6.3.11(B-D)]
1311.5 Separate Compressors. Air intakes for separate ¶
1311.5 Separate Compressors. Air intakes for separate compressors shall be permitted to be joined together to one common intake where the following conditions are met: (1) The common intake is sized to minimize backpressure in accordance with the manufacturer’s recommendations. (2) Each compressor can be isolated by manual or check valve, blind flange, or tube cap to prevent open inlet piping when the compressor(s) is removed for service from the consequent backflow of room air into the other compressor(s). [NFPA 99:5.1.3.6.3.11(G)]
1311.6 Screening. The end of the intake shall be turned ¶
1311.6 Screening. The end of the intake shall be turned down and screened or otherwise be protected against the entry of vermin, debris, or precipitation by screening fabricated or composed of a noncorroding material. [NFPA 99:5.1.3.6.3.11(H)]
1312.0 Medical Surgical Vacuum Central Supply Sys- ¶
1312.0 Medical Surgical Vacuum Central Supply Sys- tems.
1312.1 General. The vacuum plant shall be installed in a ¶
1312.1 General. The vacuum plant shall be installed in a well-lit, ventilated, and clean location with accessibility. The location shall be provided with drainage facilities in accordance with this code. The vacuum plant, where installed as a source, shall be located separately from other medical vacuum system sources and shall be readily accessible for maintenance.
1312.2 Medical-Surgical Vacuum Sources. ¶
1312.2 Medical-Surgical Vacuum Sources. Medicalsurgical vacuum central supply systems shall consist of the following: (1) Two or more vacuum pumps sufficient to serve the peak calculated demand with the largest single vacuum pump out of service. (2) Automatic means to prevent backflow from any on-cycle vacuum pumps through any off-cycle vacuum pumps. (3) Shutoff valve or other isolation means to isolate each vacuum pump from the centrally piped system, and other vacuum pumps for maintenance or repair without loss of vacuum in the system. (4) Vacuum receiver. (5) Piping between the vacuum…
1312.3 Vacuum Receivers. Receivers for vacuum shall ¶
1312.3 Vacuum Receivers. Receivers for vacuum shall meet the following requirements: (1) They shall be made of materials deemed suitable by the manufacturer. (2) They shall comply with Section VIII.1, “Unfired Pressure Vessels,” of the ASME Boiler and Pressure Vessel Code. (3) They shall be capable of withstanding a gauge pressure of 60 psi (414 kPa) and 30 inch (762 mm) gauge HgV. (4) They shall be equipped with a manual drain. (5) They shall be of a capacity based on the technology of the pumps. [NFPA 99:5.1.3.7.3]
1312.4 Vacuum Filtration. ¶
1312.4 Vacuum Filtration. Central supply systems for vacuum other than liquid ring pumps shall be provided with inlet filtration with the following characteristics: (1) Filtration shall be at least duplex to allow one filter to be exchanged without impairing the vacuum system. (2) Filtration shall be located on the patient side of the vacuum producer. (3) Filters shall be efficient to 0.3 µ and 99.97 percent HEPA or better, per DOE-STD-3020. (4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle is iso lated. (5) It shall be permitted to…
1312.5 Piping Arrangement and Redundancies. Piping arrangement shall be as follows: ¶
1312.5 Piping Arrangement and Redundancies. Piping arrangement shall be as follows: (1) Piping shall be arranged to allow service and a continuous supply of medical-surgical vacuum in the event of a single fault failure. (2) Piping arrangement shall be permitted to vary based on the technology(ies) employed, provided that an equal level of operating redundancy is maintained. (3) Where only one set of vacuum pumps is available for a combined medical-surgical vacuum system and an analysis, a research, or a teaching laboratory vacuum system, such laboratories shall be connected separately from…
1312.6 Piping Serviceability. ¶
1312.6 Piping Serviceability. The medical-surgical vacuum receiver(s) shall be serviceable without shutting down the medical-surgical vacuum system by any method to ensure continuation of service to the facility’s medical-surgical pipeline distribution system. [NFPA 99:5.1.3.7.5.2]
1312.7 Shutoff Valve. Medical-surgical vacuum central ¶
1312.7 Shutoff Valve. Medical-surgical vacuum central supply systems shall be provided with a source shutoff valve per Section 1314.6. [NFPA 99:5.1.3.7.5.3]
1313.0 Medical-Surgical Vacuum Exhaust. ¶
1313.0 Medical-Surgical Vacuum Exhaust.
1313.1 Vacuum Source Exhausts. The medical-surgical ¶
1313.1 Vacuum Source Exhausts. The medical-surgical vacuum pumps shall exhaust in a manner and location that minimizes the hazards of noise and contamination to the facility and its environment. [NFPA 99:5.1.3.7.7.1]
1313.2 Location. The exhaust shall be located as follows: ¶
1313.2 Location. The exhaust shall be located as follows: (1) Outdoors. (2) At least 25 feet (7620 mm) from any door, window, air intake, or other openings in buildings or places of public assembly. (3) At a level different from air intakes. (4) Where prevailing winds, adjacent buildings, topography, or other influences will not divert the exhaust into occupied areas or prevent dispersion of the exhaust. [NFPA 99: 5.1.3.7.7.2]
1313.3 Screening. The end of the exhaust shall be turned ¶
1313.3 Screening. The end of the exhaust shall be turned down and screened or otherwise be protected against the entry of vermin, debris, or precipitation by screening fabricated or composed of a noncorroding material. [NFPA 99:5.1.3.7.7.3]
1313.4 Dips and Loops. The exhaust shall be free of dips ¶
1313.4 Dips and Loops. The exhaust shall be free of dips and loops that might trap condensate or oil or provided with a drip leg and valved drain at the bottom of the low point. [NFPA 99:5.1.3.7.7.5]
1313.5 Multiple Pumps. Vacuum exhausts from multiple ¶
1313.5 Multiple Pumps. Vacuum exhausts from multiple pumps shall be permitted to be joined together to one common exhaust where the following conditions are met: (1) The common exhaust is sized to minimize back pressure in accordance with the pump manufacturer’s recommendations. (2) Each pump can be isolated by manual or check valve, blind flange, or tube cap to prevent open exhaust piping when the pump(s) is removed for service from consequent flow of exhaust air into the room. [NFPA 99:5.1.3.7.7.6]
1314.0 Valves. ¶
1314.1 Gas and Vacuum Shutoff Valves. Shutoff valves ¶
1314.1 Gas and Vacuum Shutoff Valves. Shutoff valves shall be provided to isolate sections or portions of the piped distribution system for maintenance, repair, or planned future expansion need and to facilitate periodic testing. [NFPA 99:5.1.4.1.1]
1314.2 Security. All valves, except valves in zone valve ¶
1314.2 Security. All valves, except valves in zone valve box assemblies, shall be secured by any of the following means: (1) Located in secured areas. (2) Locked or latched in their operating position. (3) Located above ceilings, but remaining accessible and not obstructed. [NFPA 99:5.1.4.1.2]
1314.3 Labeled. ¶
1314.3 Labeled. All valves shall be labeled as to gas supplied and the area(s) controlled, in accordance with Section 1323.14. [NFPA 99:5.1.4.1.3]
1314.4 Accessibility. Zone valves shall be installed in ¶
1314.4 Accessibility. Zone valves shall be installed in valve boxes with removable covers large enough to allow manual operation of valves. Zone valves for use in certain areas, such as psychiatric or pediatric areas, shall be permitted to be secured with the approval of the Authority Having Jurisdiction to prevent inappropriate access. [NFPA 99:5.1.4.1.4] 1314.4.1 Flammable Gases. Valves for nonflammable medical gases shall not be installed with valves for flammable gases in the same zone valve box assembly with flammable gases. [NFPA 99:5.1.4.1.5]
1314.5 Valve Types. New or replacement valves shall be ¶
1314.5 Valve Types. New or replacement valves shall be permitted to be of any type as long as they meet the following conditions: (1) They have a minimum Cv factor in accordance with Table 1314.5(1) or Table 1314.5(2). (2) They use a quarter turn to off. (3) They are constructed of materials suitable for the service. (4) They are provided with copper tube extensions by the manufacturer for brazing or with corrugated medical tubing (CMT) fittings. (5) They indicate to the operator if the valve is open or closed. 282 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used…
1314.6 Source Valves. A shutoff valve shall be placed at the ¶
1314.6 Source Valves. A shutoff valve shall be placed at the immediate connection of each central supply system to the piped distribution system to allow the entire central supply system, including all accessory devices (e.g., air dryers, final line regulators), to be isolated from the facility. [NFPA 99:5.1.4.2.1] 1314.6.1 Location. The source valve shall be located in the immediate vicinity of the central supply system. [NFPA 99:5.1.4.2.2]
1314.7 Main Line Valve. A shutoff valve shall be provided ¶
1314.7 Main Line Valve. A shutoff valve shall be provided in the main supply line inside of the buildings being served, except where one or more of the following conditions exist: (1) The source and source valve are located inside the building served. (2) The source system is physically mounted to the wall of the building served, and the pipeline enters the building in the immediate vicinity of the source valve. [NFPA 99:5.1.4.3.1] 1314.7.1 Location. The main line valve shall be located on the facility side of the source valve and outside of the source room, the enclosure, or where the main…
1314.8 Riser Valves. Each riser supplied from the main line ¶
1314.8 Riser Valves. Each riser supplied from the main line shall be provided with a shutoff valve in the riser adjacent to the main line. [NFPA 99:5.1.4.4]
1314.9 Service Valves. Service valves shall be installed to ¶
1314.9 Service Valves. Service valves shall be installed to allow servicing or modification of lateral branch piping from a main or riser without shutting down the entire main, riser, or facility. [NFPA 99:5.1.4.5.1] 1314.9.1 Branch Piping. Only one service valve shall be required for each branch off of a riser, regardless of how many zone valve boxes are installed on that lateral. Service valves shall be placed in the branch piping prior to any zone valve box assembly on that branch. [NFPA 99:5.1.4.5.2, 5.1.4.5.3]
1314.10 Zone Valves. ¶
1314.10 Zone Valves. All station outlets/inlets shall be supplied through a zone valve, which shall be placed as follows: (1) It is installed so that a wall intervenes between the valve and the outlets/inlets that it controls. (2) It is readily operable from a standing position. (3) It is installed where it is visible and accessible at all times. (4) It is not installed where it can be hidden from plain view, such as behind normally open or normally closed doors. (5) It is not installed in a room with the station outlets/inlets that it controls. (6) It is not installed in rooms, areas, or…
1314.11 In-Line Shutoff Valves. Optional in-line valves ¶
1314.11 In-Line Shutoff Valves. Optional in-line valves shall be permitted to be installed to isolate or shut off piping for servicing of individual rooms or areas. [NFPA 99:5.1.4.7]
1314.12 Valves for Future Connections. Future con ¶
1314.12 Valves for Future Connections. Future con nection valves shall be labeled as to gas content. [NFPA 99:5.1.4.8.1] 1314.12.1 Downstream Piping. Downstream piping shall be closed with a brazed cap with tubing allowance for cutting and rebrazing. [NFPA 99:5.1.4.8.2]
1315.0 Station Outlets and Inlets. ¶
1315.1 General. Each station outlet/inlet for medical gases ¶
1315.1 General. Each station outlet/inlet for medical gases or vacuums shall be gas-specific, whether the outlet/inlet is threaded or is a noninterchangeable quick coupler. [NFPA 99:5.1.5.1]
1315.2 Required Valves. Each station outlet shall consist ¶
1315.2 Required Valves. Each station outlet shall consist of a primary and a secondary valve (or assembly). Each station inlet shall consist of a primary valve (or assembly) and shall be permitted to include a secondary valve (or assembly). [NFPA 99:5.1.5.2, 5.1.5.3]
1315.3 Secondary Valve. ¶
1315.3 Secondary Valve. The secondary valve (or assembly) shall close automatically to stop the flow of gas (or vacuum, if provided) when the primary valve (or assembly) is removed. [NFPA 99:5.1.5.4]
1315.4 Identification. ¶
1315.4 Identification. Each outlet/inlet shall be legibly identified in accordance with Section 1323.15. [NFPA 99:5.1.5.5]
1315.5 Threaded Outlets/Fittings. Threaded outlets/inlets ¶
1315.5 Threaded Outlets/Fittings. Threaded outlets/inlets shall be noninterchangeable connections complying with the mandatory requirements of CGA V-5. [NFPA 99:5.1.5.6]
1315.6 Gas-Specific Station Outlet/Inlet. Each station ¶
1315.6 Gas-Specific Station Outlet/Inlet. Each station outlet/inlet, including those mounted in columns, hose reels, ceiling tracks, or other special installations, shall be designed so that parts or components that are required to be gas-specific for compliance with Section 1315.1 and Section 1315.8 cannot be interchanged between the station outlet/inlet for different gases. [NFPA 99:5.1.5.7]
1315.7 Common Parts. ¶
1315.7 Common Parts. The use of common parts in outlets/inlets, such as springs, O-rings, fasteners, seals, and shutoff poppets, shall be permitted. [NFPA 99:5.1.5.8]
1315.8 Marking of Components. ¶
1315.8 Marking of Components. Components of a vacuum station inlet necessary for the maintenance of vacuum specificity shall be legibly marked to identify them as components or parts of a vacuum or suction system. [NFPA 99:5.1.5.9]
1315.9 Components Not Specific to a Vacuum. ¶
1315.9 Components Not Specific to a Vacuum. Components of inlets not specific to a vacuum shall not be required to be marked. [NFPA 99:5.1.5.10]
1315.10 Factory-Installed Copper Inlet Tubes. ¶
1315.10 Factory-Installed Copper Inlet Tubes. Factoryinstalled copper inlet tubes on station outlets extending no further than 8 inches (203 mm) from the body of the terminal shall be not less than DN8 (NPS [1] / 4 ) ( [3] / 8 inch O.D.) size, with 0.3 inch (7.6 mm) minimum inside diameter. [NFPA 99:5.1.5.11]
1315.11 Factory-Installed Copper Outlet Tubes. ¶
1315.11 Factory-Installed Copper Outlet Tubes. Factory-installed copper outlet tubes on station inlets extending no further than 8 inches (203 mm) from the body of the terminal shall be not less than DN10 (NPS [3] / 8 ) ( [1] / 2 in. O.D.) size, with 0.4 inch (10.2 mm) minimum inside diameter. [NFPA 99:5.1.5.12]
1315.12 Protection from Damage. Station outlets/inlets ¶
1315.12 Protection from Damage. Station outlets/inlets shall be permitted to be recessed or otherwise protected from damage. [NFPA 99:5.1.5.13]
1315.13 Multiple Wall Outlets/Inlets. When multiple wall ¶
1315.13 Multiple Wall Outlets/Inlets. When multiple wall outlets/inlets are installed, they shall be spaced to allow the simultaneous use of adjacent outlets/inlets with any of the various types of therapy equipment. [NFPA 99:5.1.5.14]
1315.14 Nonstandard Operation Pressures. Station ¶
1315.14 Nonstandard Operation Pressures. Station outlets in systems having nonstandard operating pressures shall meet the following additional requirements: (1) They shall be gas-specific. (2) They shall be pressure-specific where a single gas is piped at more than one operating pressure [e.g., a station outlet for oxygen at 80 psi (552 kPa) shall not accept an adapter for oxygen at 50 psi (345 kPa)]. (3) If operated at a pressure in excess of 80 psi (552 kPa), they shall be either D.I.S.S. connectors or comply with Section 1315.14(4). (4) If operated at a gauge pressure between 200 psi and…
1315.15 Post Installation. After installation of the piping, ¶
1315.15 Post Installation. After installation of the piping, but before installation of the station outlets and inlets and other medical gas and medical gas system components (e.g., pressure-actuating switches for alarms, manifolds, pressure gauges, or pressure relief valves), the line shall be blown clear using oil-free, dry nitrogen NF.
1316.0 Pressure and Vacuum Indicator Locations. ¶
1316.0 Pressure and Vacuum Indicator Locations.
1316.1 Isolation. ¶
1316.1 Isolation. A pressure-relief valve shall not be isolated from its intended use by a valve.
1316.2 Pressure and Vacuum Indicator Locations. ¶
1316.2 Pressure and Vacuum Indicator Locations. Pressure/vacuum indicators shall be readable from a standing position. Pressure/vacuum indicators shall be provided at the following locations, as a minimum: (1) Adjacent to the alarm-initiating device for source main line pressure and vacuum alarms in the master alarm sys tem. (2) At or in area alarm panels to indicate the pressure/vacuum at the alarm activating device for each system that is monitored by the panel. (3) On the station outlet/inlet side of zone valves. [NFPA 99:5.1.8.2.1, 5.1.8.2.2] 284 2025 CALIFORNIA PLUMBING CODE ), Copyright…
1317.0 Warning Systems. ¶
1317.1 Category 1. ¶
1317.1 Category 1. All master, area, and local alarm systems used for medical gas and vacuum systems shall include the following: (1) Separate visual indicators for each condition monitored, except as permitted in Section 1317.1.2 for local alarms that are displayed on master alarm panels. (2) Visual indicators that remain in alarm until the situation that has caused the alarm is resolved. (3) Cancelable audible indication of each alarm condition that produces a sound with a minimum level of 80 dBA at 3 feet (914 mm). (4) Means to indicate a lamp or LED failure and audible fail ure. (5)…
1318.0 Piping Materials for Field-Installed Positive ¶
1318.0 Piping Materials for Field-Installed Positive Pressure Medical Gas Systems.
1318.1 General. The provisions of this section shall apply ¶
1318.1 General. The provisions of this section shall apply to field-installed piping for the distribution of medical gas systems.
1318.2 Cleaning. Tubes, valves, fittings, station outlets, and ¶
1318.2 Cleaning. Tubes, valves, fittings, station outlets, and other piping components in medical gas systems shall have been cleaned for oxygen service by the manufacturer prior to installation in accordance with the mandatory requirements of CGA G-4.1, except that fittings shall be permitted to be cleaned by a supplier or agency other than the manufacturer. [NFPA 99:5.1.10.1.1] Where tube ends, fittings or other components become contaminated before installation they shall be recleaned in accordance with Section 1321.8.7 and Section 1321.8.8.
1318.3 Delivery. Each length of tube shall be delivered ¶
1318.3 Delivery. Each length of tube shall be delivered plugged or capped by the manufacturer and kept sealed until prepared for installation. Fittings, valves, and other components shall be delivered sealed and labeled and kept sealed until prepared for installation. [NFPA 99:5.1.10.1.2, 5.1.10.1.3]
1318.4 Tubes for Medical Gas Systems. Tubes shall be ¶
1318.4 Tubes for Medical Gas Systems. Tubes shall be hard-drawn seamless copper in accordance with ASTM B819, medical gas tube, Type L, except Type K shall be used where operating pressures are above a gauge pressure of 185 psi (1276 kPa) and the pipe sizes are larger than DN80 [(NPS 3) (3 [1] / 8 inches O.D.)]. {NFPA 99:5.1.10.1.4}
1318.5 Manufacturer Markings. ASTM B819, medical gas ¶
1318.5 Manufacturer Markings. ASTM B819, medical gas tube shall be identified by the manufacturer’s markings “OXY,” “MED,” “OXY/MED,” “OXY/ACR,” or “ACR/MED” in blue (Type L) or green (Type K). [NFPA 99:5.1.10.1.7]
1318.6 Documentation. ¶
1318.6 Documentation. The installer shall furnish documentation certifying that all installed piping materials comply with the requirements of Section 1318.2. [NFPA 99:5.1.10.1.8]
1319.0 Piping Materials for Field-Installed Medical- ¶
1319.0 Piping Materials for Field-Installed Medical- Surgical Vacuum Systems.
1319.1 Tubes for Medical Vacuum Systems. Piping for ¶
1319.1 Tubes for Medical Vacuum Systems. Piping for vacuum systems shall be constructed of any of the following: (1) Hard-drawn seamless copper tube in accordance with the following: (a) ASTM B88, copper tube (Type K, Type L, or Type M) (b) ASTM B280, copper ACR tube (c) ASTM B819, copper medical gas tubing (Type K or Type L) (2) Stainless steel tube in accordance with the following: (a) ASTM A269 TP304L or 316L (b) ASTM A312 TP304L or 316L ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL…
1320.0 Joints and Connections. ¶
1320.1 General. This section sets forth the requirements for ¶
1320.1 General. This section sets forth the requirements for pipe joint installations for a medical gas or vacuum system.
1320.2 Changes in Direction. Positive pressure patient ¶
1320.2 Changes in Direction. Positive pressure patient gas systems, medical support gas systems, and vacuum systems constructed of hard-drawn seamless copper or stainless steel tubing shall have all turns, offsets, and other changes in direction made using fittings or techniques appropriate to any of the following acceptable joining methods: (1) Brazing, as described in Section 1321.0. (2) Welding, as described in Section 1322.1 through Section 1322.2.1. (3) Memory metal fittings, as described in Section 1322.3. (4) Axially swaged, elastic preload fittings, as described in Section 1322.4. (5)…
1321.0 Brazed Joints. ¶
1321.1 Brazed Joints and Fittings. Fittings shall be ¶
1321.1 Brazed Joints and Fittings. Fittings shall be wrought-copper capillary fittings complying with ASME B16.22, or brazed fittings complying with ASME B16.50. Cast copper alloy fittings shall not be permitted. Brazed joints shall be made using a brazing alloy that exhibits a melting temperature in excess of 1000°F (538°C) to retain the integrity of the piping system in the event of fire exposure. [NFPA 99:5.1.10.4.1.1 – 5.1.10.4.1.3]
1321.2 Tube Joints. Brazed tube joints shall be the socket ¶
1321.2 Tube Joints. Brazed tube joints shall be the socket type. [NFPA 99:5.1.10.4.1.4]
1321.3 Filler Metals. Filler metals shall bond with and be ¶
1321.3 Filler Metals. Filler metals shall bond with and be metallurgically compatible with the base metals being joined. Filler metals shall comply with AWS A5.8. [NFPA 99:5.1.10.4.1.5, 5.1.10.4.1.6]
1321.4 Copper-to-Copper Joints. Copper-to-copper ¶
1321.4 Copper-to-Copper Joints. Copper-to-copper joints shall be brazed using a copper–phosphorus or copperphosphorus-silver brazing filler metal (BCuP series) without flux. [NFPA 99:5.1.10.4.1.7]
1321.5 Accessible. Joints to be brazed in place shall be ¶
1321.5 Accessible. Joints to be brazed in place shall be accessible for necessary preparation, assembly, heating, filler application, cooling, cleaning, and inspection. [NFPA 99:5.1.10.4.1.9]
1321.6 Purging. Braze joints shall be continuously purged ¶
1321.6 Purging. Braze joints shall be continuously purged with nitrogen NF. [NFPA 99:5.1.10.4.1.10]
1321.7 Tube Ends. Tube ends shall be cut square using a ¶
1321.7 Tube Ends. Tube ends shall be cut square using a sharp tubing cutter to avoid deforming the tube. [NFPA 99:5.1.10.4.2.1] 1321.7.1 Cutting Wheels. The cutting wheels on tubing cutters shall be free from grease, oil, or other lubricant not suitable for oxygen service. [NFPA 99:5.1.10.4.2.2] 1321.7.2 Cut Ends. The cut ends of the tube shall be rolled smooth or deburred with a sharp, clean deburring tool, taking care to prevent chips from entering the tube. [NFPA 99:5.1.10.4.2.3]
1321.8 Cleaning Procedures. The interior surfaces of ¶
1321.8 Cleaning Procedures. The interior surfaces of tubes, fittings, and other components that are cleaned for oxygen service shall be stored and handled to avoid contamination prior to assembly and brazing. [NFPA 99:5.1.10.4.3.1] 1321.8.1 Exterior Surfaces. The exterior surfaces of tube ends shall be cleaned prior to brazing to remove any surface oxides. When cleaning the exterior surfaces of tube ends, no matter shall be allowed to enter the tube. [NFPA 99:5.1.10.4.3.2, 5.1.10.4.3.3] 1321.8.2 Interior Surfaces. If the interior surfaces of fitting sockets become contaminated prior to…
1321.9 Brazing Dissimilar Metals. Flux shall only be ¶
1321.9 Brazing Dissimilar Metals. Flux shall only be used when brazing dissimilar metals, such as copper and bronze or brass, using a silver (BAg series) brazing filler metal. [NFPA 99:5.1.10.4.4.1] 1321.9.1 Surface Cleaning. Surfaces shall be cleaned for brazing in accordance with Section 1321.8. [NFPA 99:5.1.10.4.4.2] 1321.9.2 Flux. Flux shall be applied sparingly to minimize contamination of the inside of the tube with flux. The flux shall be applied and worked over the cleaned surfaces to be brazed using a stiff bristle brush to ensure complete coverage and wetting of the surfaces with…
1321.10 Nitrogen Purge. When brazing, joints shall be ¶
1321.10 Nitrogen Purge. When brazing, joints shall be continuously purged with oil-free, dry nitrogen NF to prevent the formation of copper oxide on the inside surfaces of the joint. [NFPA 99:5.1.10.4.5.1] 1321.10.1 Source. The source of the purge gas shall be monitored, and the installer shall be audibly alerted when the source content is low. [NFPA 99:5.1.10.4.5.2] 1321.10.2 Flow Rate Control. The purge gas flow rate shall be controlled by the use of a pressure regulator and flowmeter, or combination thereof. Pressure regulators alone shall not be used to control purge gas flow rates. [NFPA…
1321.11 Assembling and Heating Brazed Joints. Tube ¶
1321.11 Assembling and Heating Brazed Joints. Tube ends shall be inserted into the socket, either fully or to a mechanically limited depth that is not less than the minimum cup depth (overlap) specified by ASME B16.50. [NFPA 99:5.1.10.4.6.1] 1321.11.1 Heating of Joint. Where flux is permitted, the joint shall be heated slowly until the flux has liquefied. After flux is liquefied, or where flux is not permitted to be used, the joint shall be heated quickly to the brazing temperature, taking care not to overheat the joint. [NFPA 99:5.1.10.4.6.2, 5.1.10.4.6.3]
1321.12 Inspection of Brazed Joints. After brazing, the ¶
1321.12 Inspection of Brazed Joints. After brazing, the outside of all joints shall be cleaned by washing with water and a wire brush to remove any residue and allow clear visual inspection of the joint. [NFPA 99:5.1.10.4.7.1] 1321.12.1 Where Flux Is Used. Where flux has been used, the wash water shall be hot. [NFPA 99:5.1.10.4.7.2] 1321.12.2 Visually Inspected. Each brazed joint shall be visually inspected after cleaning the outside surfaces. [NFPA 99:5.1.10.4.7.3] 1321.12.3 Prohibited Brazed Joints. Joints exhibiting the following conditions shall not be permitted: (1) Flux or flux residue…
1322.0 Welded Joints. ¶
1322.1 Welded Joints Procedure. ¶
1322.1 Welded Joints Procedure. Welded joints for medical gas and medical-surgical vacuum systems shall be permitted to be made using a gas tungsten arc welding (GTAW) autogenous orbital procedure. [NFPA 99:5.1.10.5.1.1] 1322.1.1 Welder Qualification Procedure. The GTAW autogenous orbital procedure and the welder qualification procedure shall be qualified in accordance with Section IX of the ASME Boiler and Pressure Vessel Code. Welder qualification procedures shall include a bend test and a tensile test in accordance with Section IX of the ASME Boiler and Pressure Vessel Code on each tube…
1322.2 Welding for Stainless Tube. Stainless tube shall ¶
1322.2 Welding for Stainless Tube. Stainless tube shall be welded using metal inert gas (MIG) welding, tungsten inert gas (TIG) welding, or other welding techniques suited to joining stainless tube. [NFPA 99:5.1.10.5.2.1] 1322.2.1 Qualifications. Welders shall be qualified to Section IX of the ASME Boiler and Pressure Vessel Code. [NFPA 99:5.1.10.5.2.2]
1322.3 Memory Metal Fittings. Memory metal fittings ¶
1322.3 Memory Metal Fittings. Memory metal fittings having a temperature rating not less than 1000°F (538°C) and a pressure rating not less than 300 psi (2068 kPa) shall be permitted to be used to join copper or stainless steel tube. Memory metal fittings shall be installed by qualified technicians in accordance with the manufacturer’s instructions. [NFPA 99:5.1.10.6.1, 5.1.10.6.2]
1322.4 Axially Swaged Fittings. Axially swaged fittings ¶
1322.4 Axially Swaged Fittings. Axially swaged fittings providing metal-to-metal seals, suitable for service at 300 psig (2070 kPa) and able to withstand a temperature of 1000°F (538°C) and that, when complete, are permanent and nonseparable shall be permitted to be used to join copper or stainless steel tube. Axially swaged fittings shall be installed by qualified technicians in accordance with the manufacturer’s instructions. [NFPA 99:5.1.10.7.1, 5.1.10.7.2]
1322.5 Threaded Fittings. Threaded fittings shall meet the ¶
1322.5 Threaded Fittings. Threaded fittings shall meet the following criteria: (1) They shall be limited to connections for pressure and vacuum indicators, alarm devices, gas-specific demand check fittings, and source equipment on the source side of the source valve. (2) They shall be tapered pipe threads complying with ASME B1.20.1. (3) They shall be made up with polytetrafluoroethylene (PTFE) tape or other thread sealant recommended for oxygen service, with sealant applied to the male threads only and care taken to ensure sealant does not enter the pipe. [NFPA 99:5.1.10.8]
1322.6 Other Types of Fittings. ¶
1322.6 Other Types of Fittings. Listed or approved metallic gas tube fittings that, when made up, provide a permanent joint having the mechanical, thermal, and sealing integrity of a brazed joint shall be permitted to be used. [NFPA 99:5.1.10.9.1] 1322.6.1 Dielectric Fittings. Dielectric fittings that comply with the following shall be permitted only where required by the manufacturer of special medical equipment to electrically isolate the equipment from the system distribution piping: (1) They shall be of brass or copper construction with an approved dielectric. (2) They shall be permitted…
1322.7 Prohibited Joints. The following joints shall be ¶
1322.7 Prohibited Joints. The following joints shall be prohibited throughout medical gas and vacuum distribution pipeline systems: (1) Flared and compression-type connections, including connections to station outlets and inlets, alarm devices, and other components. (2) Other straight-threaded connections, including unions. (3) Pipe-crimping tools used to permanently stop the flow of medical gas and vacuum piping. 288 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND…
1323.0 Installation of Piping and Equipment. ¶
1323.0 Installation of Piping and Equipment.
1323.1 Required Pipe Sizing. Piping systems shall be ¶
1323.1 Required Pipe Sizing. Piping systems shall be designed and sized to deliver the required flow rates at the utilization pressures. [NFPA 99:5.1.10.11.1.1] 1323.1.1 Mains and Branches. Mains and branches in medical gas piping systems shall be not less than DN15 (NPS [1] ⁄ 2 ) ( [5] ⁄ 8 inch O.D.) size. Mains and branches in medical-surgical vacuum systems shall be not less than DN20 (NPS [3] ⁄ 4 ) ( [7] ⁄ 8 inch O.D.) size. [NFPA 99:5.1.10.11.1.2, 5.1.10.11.1.3] 1323.1.2 Drops to Individual Stations. Drops to individual station outlets and inlets shall be not less than DN15 (NPS [1] ⁄ 2…
1323.2 Pipe Protection. Piping shall be protected against ¶
1323.2 Pipe Protection. Piping shall be protected against freezing, corrosion, and physical damage. [NFPA 99:5.1.10.11.2] 1323.2.1 Exposed Piping. Piping exposed in corridors and other areas where subject to physical damage from the movement of carts, stretchers, portable equipment, or vehicles shall be protected. [NFPA 99:5.1.10.11.2.1] 1323.2.2 Underground Piping. Piping underground within buildings or embedded in concrete floors or walls shall be installed in a continuous conduit. [NFPA 99:5.1.10.11.2.2] TABLE 1323.1.5(1) SYSTEM SIZING – FLOW REQUIREMENTS FOR STATION OUTLETS AND INLETS [1]…
1323.3 Location of Piping. ¶
1323.3 Location of Piping. Piping risers shall be permitted to be installed in pipe shafts if protected from physical damage, effects of excessive heat, corrosion, or contact with oil. [NFPA 99:5.1.10.11.3.1] 1323.3.1 Prohibited Locations. Piping shall not be installed in kitchens, stairwells, elevator shafts, elevator machine rooms, areas with open flames, electrical service equipment over 600 volts, and areas prohibited Cal- ifornia Electrical Code except for the following locations: (1) Room locations for medical air compressor supply systems and medical-surgical vacuum pump supply systems…
1323.4 Pipe Support. Piping shall be supported from the ¶
1323.4 Pipe Support. Piping shall be supported from the building structure. [NFPA 99:5.1.10.11.4.1] 1323.4.1 Hangers and Supports. Hangers and supports shall comply with and be installed in accordance with MSS SP-58. [NFPA 99:5.1.10.11.4.2] 1323.4.2 Copper Tube. Supports for copper tube shall be sized for copper tube. [NFPA 99:5.1.10.11.4.3] 1323.4.3 Damp Locations. In potentially damp locations, copper tube hangers or supports that are in contact with the tube shall be plastic-coated or otherwise be electrically insulated from the tube by a material that will not absorb moisture. [NFPA…
1323.5 Frost Protection. ¶
1323.5 Frost Protection. Buried piping outside of buildings shall be installed below the local level of frost penetration. [NFPA 99:5.1.10.11.5.1] TABLE 1323.4.4 MAXIMUM PIPE SUPPORT SPACING [NFPA 99: TABLE 5.1.10.11.4.6] For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS 1323.5.1 Backfilling and Trenching. The installation procedure for underground piping shall protect the piping from physical damage while being…
1323.6 Connectors. Hose and flexible connectors, both ¶
1323.6 Connectors. Hose and flexible connectors, both metallic and nonmetallic, shall be no longer than necessary and shall not penetrate or be concealed in walls, floors, ceilings, or partitions. [NFPA 99:5.1.10.11.6.1] 1323.6.1 Flexible Connectors. Flexible connectors, metallic or nonmetallic, shall have a minimum burst pressure, with a gauge pressure of 1000 psi (6895 kPa). [NFPA 99:5.1.10.11.6.2] 1323.6.2 Metallic Flexible Joints. Metallic flexible joints shall be permitted in the pipeline where required for expansion joints, seismic protection, thermal expansion, or vibration control and…
1323.7 Prohibited System Interconnections. Two or ¶
1323.7 Prohibited System Interconnections. Two or more medical gas or vacuum piping systems shall not be interconnected for installation, testing, or any other reason except as permitted by Section 1323.7.1. [NFPA 99:5.1.10.11.7.1] 1323.7.1 Medical Gas and Medical Vacuum. Medical gas and vacuum systems with the same contents shall be permitted to be interconnected with an inline valve installed between the systems. [NFPA 99:5.1.10.11.7.2] 1323.7.2 Leak Testing. Leak testing shall be accomplished by separately charging and testing each individual piping system. [NFPA 99:5.1.10.11.7.3]
1323.8 Manufacturer’s Instructions. The installation of ¶
1323.8 Manufacturer’s Instructions. The installation of individual components shall be made in accordance with the instructions of the manufacturer. Manufacturer’s instructions shall include directions and information deemed by the manufacturer to be adequate for attaining proper operation, testing, and maintenance of the medical gas and vacuum systems. Copies of the manufacturer’s instructions shall be left with the system owner. [NFPA 99:5.1.10.11.8.1 – 5.1.10.11.8.3]
1323.9 Changes in System Use. ¶
1323.9 Changes in System Use. Where a positive-pressure medical gas piping distribution system originally used or constructed for use at one pressure and for one gas is converted for operation at another pressure or for another gas, all provisions of Section 1318.0 through Section 1323.12 shall apply as if the system were new. [NFPA 99:5.1.10.11.9.1] 1323.9.1 Medical Vacuum System. A vacuum system shall not be permitted to be converted for use as a gas system. [NFPA 99:5.1.10.11.9.2]
1323.10 Qualifications of Installers. The installation of ¶
1323.10 Qualifications of Installers. The installation of medical gas and vacuum systems shall be made by qualified, competent technicians who are experienced in performing such installations, including all personnel who actually install the piping system. Installers of medical gas and vacuum piped distribution systems, all appurtenant piping supporting pump and compressor source systems, and appurtenant piping supporting source gas manifold systems not including permanently installed bulk source systems, shall be certified in accordance with ASSE/IAPMO/ANSI 6010. [NFPA 99:5.1.10.11.10.1,…
1323.11 Qualification of Brazing Procedures and ¶
1323.11 Qualification of Brazing Procedures and Brazing. Brazing procedures and brazer performance for the installation of medical gas and vacuum piping shall be qualified in accordance with either Section IX, “Welding and Brazing Qualifications,” of the ASME Boiler and Pressure Vessel Code, or AWS B2.2, both as modified by Section 1323.11.1 through Section 1323.11.4. [NFPA 99:5.1.10.11.11.1] 1323.11.1 Examination. Brazers shall be qualified by visual examination of the test coupon followed by sectioning. [NFPA 99:5.1.10.11.11.2] 1323.11.2 Brazing Procedure Specification. The brazing…
1323.12 Breaching or Penetrating Medical Gas Pip- ¶
1323.12 Breaching or Penetrating Medical Gas Pip- ing. Positive pressure patient medical gas piping and medical support gas piping shall not be breached or penetrated by any means or process that will result in residual copper particles or other debris remaining in the piping or affect the oxygen-clean interior of the piping. The breaching or penetrating process shall ensure that any debris created by the process remains contained within the work area. [NFPA 99:5.1.10.11.12.1, 5.1.10.11.12.2]
1323.13 Labeling, Identification and Operating Pres- ¶
1323.13 Labeling, Identification and Operating Pres- sure. Color and pressure requirements shall be in accordance with Table 1305.1. [NFPA 99:5.1.11] 1323.13.1 Pipe Labeling. Piping shall be labeled by stenciling or adhesive markers that identify the patient medical gas, the medical support gas, or the vacuum system and include the following: (1) Name of the gas or vacuum system or the chemical symbol per Table 1305.1. (2) Gas or vacuum system color code per Table 1305.1. [NFPA 99:5.1.11.1.1] 1323.13.2 Pipe Pressure Labeling. Where positive pressure gas piping systems operate at pressures…
1323.14 Identification of Shutoff Valves. Shutoff valves ¶
1323.14 Identification of Shutoff Valves. Shutoff valves shall be identified with the following: (1) Name or chemical symbol for the specific medical gas or vacuum system (2) Gas or vacuum system color code in accordance with Table 1305.1 (3) Room or areas served (4) Caution to not close or open the valve except in emergency [NFPA 99:5.1.11.2.1] 1323.14.1 Nonstandard Operating Pressures. Where positive pressure gas piping systems operate at pressures other than the standard gauge pressure of 50 psi (345 kPa) to 55 psi (379 kPa) or a gauge pressure of 160 « « ), Copyright © 2025 IAPMO, and may…
1323.15 Identification. Station outlets and inlets shall be ¶
1323.15 Identification. Station outlets and inlets shall be identified as to the name or chemical symbol for the specific medical gas or vacuum provided and shall include the following: (1) Name of the gas or vacuum system or the chemical symbol in accordance with Table 1305.1 (2) Gas or vacuum system color code in accordance with Table 1305.1 In sleep labs, where the outlet is downstream of a flow control device, the station outlet identification shall include a warning not to use the outlet for ventilating patients. Where medical gas systems operate at pressures other than the standard…
1324.0 Performance Criteria and Testing Category 1 ¶
1324.0 Performance Criteria and Testing Category 1 (Gases, Medical Surgical Vacuum).
1324.1 Where Required. Inspection and testing shall be ¶
1324.1 Where Required. Inspection and testing shall be performed on components, or portions thereof, of new, piped medical gas or vacuum systems, additions, renovations, temporary installations, or repaired systems in accordance with Section 1324.2 through Section 1324.5.11, and certified in accordance with Section 1306.0.
1324.2 Breached Systems. All systems that are breached ¶
1324.2 Breached Systems. All systems that are breached and components that are subject to additions, renovations, or replacement (e.g., new gas sources: bulk, manifolds, compressors, dryers, alarms) shall be inspected and tested. Systems shall be deemed breached at the point of pipeline intrusion by physical separation or by system component removal, replacement, or addition. Breached portions of the systems subject to inspection and testing shall be confined to only the specific altered zone and components in the immediate zone or area that is located upstream for vacuum systems and…
1324.3 Test Gas. The test gas shall be oil-free, dry nitrogen ¶
1324.3 Test Gas. The test gas shall be oil-free, dry nitrogen NF. [NFPA 99:5.1.12.2.1.2]
1324.4 Initial Piping Blowdown. Piping in medical gas and ¶
1324.4 Initial Piping Blowdown. Piping in medical gas and vacuum distribution systems shall be blown clear by means of oil-free, dry nitrogen NF after installation of the distribution piping but before installation of station outlet/inlet rough-in assemblies and other system components (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, pressure relief valves, manifolds, source equipment). [NFPA 99:5.1.12.2.2]
1324.5 Initial Pressure Tests – Medical Gas and Vac- ¶
1324.5 Initial Pressure Tests – Medical Gas and Vac- uum Systems. Each section of the piping in medical gas and vacuum systems shall be pressure tested. Initial pressure tests shall be conducted as follows: (1) After blowdown of the distribution piping. (2) After installation of station outlet/inlet rough-in assemblies. (3) Prior to the installation of components of the distribution piping system that would be damaged by the test pressure (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, line pressure relief valves). [NFPA 99:5.1.12.2.3.1, 5.1.12.2.3.2] 296 2025 CALIFORNIA…
1325.0 Category 2 Piped Gas and Vacuum Systems. ¶
1325.0 Category 2 Piped Gas and Vacuum Systems.
1325.1 General. ¶
1325.1 General. Category 2 piped gas or piped vacuum system requirements shall be permitted when all of the following criteria are met: (1) Only moderate sedation (as defined in Chapter 2), minimal sedation (as defined in Chapter 2); or no sedation is performed. Deep sedation and general anesthesia shall not be permitted. (2) The loss of the piped gas or piped vacuum systems is likely to cause minor injury to patients, staff, or visitors. (3) The facility piped gas or piped vacuum systems are intended for Category 2 patient care space as defined in Chapter 2. [NFPA 99:5.2.1.2] TABLE 1324.5.11…
1325.2 Nature of Hazards of Gas and Vacuum Sys- ¶
1325.2 Nature of Hazards of Gas and Vacuum Sys- tems. The requirement of Section 1307.2 shall apply to the nature of hazards of gas and vacuum systems. [NFPA 99:5.2.2]
1325.3 Central Supply Systems. Category 2 systems ¶
1325.3 Central Supply Systems. Category 2 systems shall comply with Section 1307.3 through Section 1309.13. [NFPA 99:5.2.3.4]
1325.4 Category 2 Medical Air Supply Systems. ¶
1325.4 Category 2 Medical Air Supply Systems. Category 2 systems shall comply with Section 1310.0 through Section 1311.6, except as follows: (1) Medical air compressors, dryers, aftercoolers, filters, and regulators shall be permitted to be simplex. (2) The facility staff shall develop their emergency plan to deal with the loss of medical air. [NFPA 99:5.2.3.5]
1325.5 Oxygen Concentrators. Oxygen supply systems ¶
1325.5 Oxygen Concentrators. Oxygen supply systems using concentrators shall be permitted to consist of two sources, one of which shall be a cylinder header with sufficient cylinder connections for one average day’s supply. [NFPA 99:5.2.3.6]
1325.6 Category 2 Medical-Surgical Vacuum. ¶
1325.6 Category 2 Medical-Surgical Vacuum. Category 2 systems shall comply with Section 1312.0 through Section 1313.5, except as follows: (1) Medical-surgical vacuum systems shall be permitted to be simplex. (2) The facility staff shall develop their emergency plan to deal with the loss of medical-surgical vacuum. [NFPA 99:5.2.3.7]
1325.7 Valves. ¶
1325.7 Valves. Category 2 systems shall comply with Section 1314.0 through Section 1314.12.1. [NFPA 99:5.2.4]
1325.8 Station Outlets and Inlets. Category 2 systems ¶
1325.8 Station Outlets and Inlets. Category 2 systems shall comply with Section 1315.0. [NFPA 99:5.2.5]
1325.9 Pressure and Vacuum Indicators. Category 2 ¶
1325.9 Pressure and Vacuum Indicators. Category 2 systems shall comply with Section 1316.2. [NFPA 99:5.2.8]
1325.10 Warning Systems. Warning systems associated ¶
1325.10 Warning Systems. Warning systems associated with Category 2 systems shall provide the master, area, and local alarm functions of a Category 1 system as required in Section 1317.0, except as follows: (1) Warning systems shall be permitted to be a single alarm panel. (2) The alarm panel shall be located in an area of continuous surveillance while the facility is in operation. (3) Pressure and vacuum switches/sensors shall be mounted at the source equipment with a pressure indicator at the master alarm panel. [NFPA 99:5.2.9]
1325.11 Category 2 Distribution. Category 2 systems ¶
1325.11 Category 2 Distribution. Category 2 systems shall comply with Section 1318.0 through Section 1323.12. [NFPA 99:5.2.10]
1325.12 Labeling and Identification. ¶
1325.12 Labeling and Identification. Category 2 systems shall comply with Section 1323.13 through Section 1323.15. [NFPA 99:5.2.11]
1325.13 Performance Criteria and Testing — Gas, ¶
1325.13 Performance Criteria and Testing — Gas, Medical–Surgical Vacuum, and WAGD. Category 2 systems shall comply with Section 1324.0. [NFPA 99:5.2.12] ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS « « « « «
1326.6 Station Outlets and Inlets. Category 3 systems ¶
1326.6 Station Outlets and Inlets. Category 3 systems shall comply with Section 1315.0. [NFPA 99:5.3.5]
1326.7 Pressure and Vacuum Indicators. Category 3 ¶
1326.7 Pressure and Vacuum Indicators. Category 3 systems shall comply with Section 1316.2. [NFPA 99:5.3.8]
1326.8 Warning Systems. Warning systems associated ¶
1326.8 Warning Systems. Warning systems associated with Category 3 systems shall provide the master, area, and local alarm functions of a Category 1 system as required in Section 1317.0, except as follows: (1) Warning systems shall be permitted to be a single alarm panel (i.e., a combination master/area alarm panel). (2) The alarm panel shall be located in an area of continuous surveillance while the facility is in operation. (3) Pressure and vacuum switches/sensors shall be mounted at the source equipment with a pressure indicator at the master alarm panel. (4) Electrical power for warning…
1326.9 Distribution. Category 3 systems shall comply with ¶
1326.9 Distribution. Category 3 systems shall comply with Section 1318.0 through Section 1323.12. [NFPA 99:5.3.10]
1326.10 Labeling and Identification. Category 3 systems ¶
1326.10 Labeling and Identification. Category 3 systems shall comply with Section 1323.13 through Section 1323.15. [NFPA 99:5.3.11] Part V – Dental Gas and Vacuum Systems.
1327.0 Dental Gas and Vacuum Systems. ¶
1327.0 Dental Gas and Vacuum Systems.
1327.1 General. Dental gas and vacuum systems shall comply with this code and NFPA 99. ¶
1327.1 General. Dental gas and vacuum systems shall comply with this code and NFPA 99.
1327.2 Emergency Shutoff Valves (Oxygen and ¶
1327.2 Emergency Shutoff Valves (Oxygen and Nitrous Oxide). (1) All Category 2 medical gas systems shall have an emergency shutoff valve accessible from all use-point locations in an emergency. (2) Where a central medical gas supply system supplies two treatment facilities, each facility shall be provided with an emergency shutoff valve located in that treatment facility so as to be accessible from all use-point locations in an emergency. (3) Emergency shutoff valves shall be labeled to indicate the gas controlled by the shutoff valve and shall shut off only the gas to the treatment facility…
1327.3 Warning Systems (Oxygen and Nitrous ¶
1327.3 Warning Systems (Oxygen and Nitrous Oxide). Category 2 warning systems shall comply with Section 1325.10 except as follows: (1) Warning systems shall be permitted to be a single alarm panel. » Part IV – Category 3 Piped Gas and Vacuum Systems.
1326.0 Category 3 Piped Gas and Vacuum Systems. ¶
1326.0 Category 3 Piped Gas and Vacuum Systems.
1326.1 General. Category 3 piped gas and vacuum systems ¶
1326.1 General. Category 3 piped gas and vacuum systems shall be permitted when all of the following criteria are met: (1) Only minimal sedation, as defined in Chapter 2; or no sedation is performed. Deep sedation, moderate sedation, and general anesthesia are not performed. (2) The loss of the piped gas and vacuum systems is not likely to cause injury to patients, staff, or visitors, but can cause discomfort. (3) The facility piped gas and vacuum systems are intended for Category 3 patient care rooms as defined in Chapter 2. [NFPA 99:5.3.1.2]
1326.2 Nature of Hazards of Gas and Vacuum Sys- ¶
1326.2 Nature of Hazards of Gas and Vacuum Sys- tems. The requirement of Section 1307.2 shall apply to the nature of hazards of gas and vacuum systems. [NFPA 99:5.3.2]
1326.3 Medical Air Supply Systems. Category 3 central ¶
1326.3 Medical Air Supply Systems. Category 3 central supply systems shall be permitted to consist of the following: (1) Gas cylinder or cryogenic liquid container headers in accordance with NFPA 99. (2) Oxygen concentrator supply units in accordance with NFPA 99. (3) Cylinder manifolds for gas cylinders in accordance with NFPA 99. (4) Manifolds for cryogenic liquid containers in accordance with NFPA 99. (5) Cryogenic fluid central supply systems in accordance with NFPA 99. (6) Medical air compressor systems in accordance with NFPA 99. (7) Proportioning air systems in accordance with NFPA 99.…
1326.4 Medical–Surgical Vacuum Systems. Category ¶
1326.4 Medical–Surgical Vacuum Systems. Category 3 systems shall comply with Section 1307.3 through Section 1309.13 and Section 1312.0 through Section 1313.5, except as follows: (1) Medical–surgical vacuum systems shall be permitted to be simplex. (2) The facility staff shall develop an emergency plan to deal with the loss of medical–surgical vacuum. (3) Emergency electrical service shall conform to the requirements of Section 6.6 of NFPA 99 and NFPA 70. [NFPA 99:5.3.3.7]
1326.5 Valves. Category 3 systems shall comply with Section 1314.0. [NFPA 99:5.3.4] ¶
1326.5 Valves. Category 3 systems shall comply with Section 1314.0. [NFPA 99:5.3.4] 300 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS (2) The alarm panel shall be located in an area of continuous surveillance while the facility is in operation. (3) Pressure and vacuum switches/sensors shall be mounted at the source equipment with a pressure indicator at the master alarm panel. (4) Warning systems for medical gas systems shall…
1327.4 Initial Pressure Test. Each section of the piping in ¶
1327.4 Initial Pressure Test. Each section of the piping in positive-pressure gas systems and copper vacuum systems shall be pressure tested. Plastic vacuum and plastic scavenging piping shall not be pressure tested. [NFPA 99:15.4.7.4.4.1] 1327.4.1 Pressure Test. Initial pressure tests shall be conducted as follows: (1) After blowdown of the distribution piping (2) After installation of station outlet/inlet rough-in assemblies (3) Prior to the installation of components of the distribution piping system that would be damaged by the test pressure (e.g., pressure/vacuum alarm devices,…
1327.5 Maximum Copper Tube Support Spacing. The ¶
1327.5 Maximum Copper Tube Support Spacing. The maximum support spacing for copper tube shall be in accordance with Table 1327.5. [NFPA 99:15.4.5.6.5] TABLE 1327.5 MAXIMUM COPPER TUBE SUPPORT SPACING [NFPA 99: TABLE 15.4.5.6.5] PIPE SIZECol2Col3HANGER<brSPACING<br(feet) ------------ <brDN8(NPS1/4)(3/8 of an inch O.D.)5 <brDN10(NPS3/8)(1/2 of an inch O.D.)6 <brDN15(NPS1/2)(5/8 of an inch O.D.)6 <brDN20(NPS3/4)(7/8 of an inch O.D.)7 <brDN25(NPS 1)(11/8 of an inch O.D.)8 <brDN32(NPS 11/4)(13/8 of an inch O.D.)9 <br<brDN40 and<brlarger(NPS 11/2)(15/8 of an inch O.D.)10 <br <brVertical risers, all…
1327.6 Maximum Plastic Pipe Support Spacing. The ¶
1327.6 Maximum Plastic Pipe Support Spacing. The maximum support spacing for plastic pipe shall be in accordance with Table 1327.6. [NFPA 99:15.4.5.6.6] TABLE 1327.6 MAXIMUM PLASTIC PIPE SUPPORT SPACING [NFPA 99: TABLE 15.4.5.6.6] PIPE SIZECol2Col3HANGER<brSPACING<br(feet) ------------ <brDN15(NPS1⁄2)(5⁄8 of an inch O.D.)4 DN20(NPS3⁄4)(7⁄8 of an inch O.D.)4 <br<brDN25(NPS 1)(11⁄8 of an inch O.D.)4.33 <brDN32(NPS 11⁄4)(13⁄8 of an inch O.D.)4.33 <brDN40(NPS 11⁄8)(15⁄8 of an inch O.D.)4.66 <brDN50(NPS 2)(23⁄8 of an inch O.D.)4.66 <br<brDN65 and<brlarger(NPS 21⁄2)(27⁄8 of an inch O.D.)5 <br…
1327.7 Standing Pressure Tests for Oxygen and ¶
1327.7 Standing Pressure Tests for Oxygen and Nitrous Oxide Piping. After successful completion of the initial pressure tests in Section 1327.4, the gas distribution piping shall be subject to a standing pressure test. [NFPA 99:15.4.7.4.6.1] 1327.7.1 Tests Required. Tests shall be conducted after the final installation of station outlet valve bodies, TABLE 1327.5 MAXIMUM COPPER TUBE SUPPORT SPACING [NFPA 99: TABLE 15.4.5.6.5] For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm TABLE 1327.6 MAXIMUM PLASTIC PIPE SUPPORT SPACING [NFPA 99: TABLE 15.4.5.6.6] For SI units: 1 inch = 25 mm, 1 foot =…
1327.8 Verifier Operational Pressure Test. Operational ¶
1327.8 Verifier Operational Pressure Test. Operational pressure tests shall be performed at each station outlet or terminal where the user makes connections and disconnections. [NFPA 99:15.4.7.5.8.1] 1327.8.1 Test Gas. Tests shall be performed with the gas of system designation. [NFPA 99:15.4.7.5.8.2] 1327.8.2 Medical Gas Outlets. All medical gas outlets with a gauge pressure of 50 psi (345 kPa), including oxygen and nitrous oxide, shall deliver 1.8 standard cubic feet per minute (SCFM) (50 SLPM) with a pressure drop of not more than 5 psi (34 kPa) and static pressure of 50 psi (345 kPa) to…
1401.0 General. ¶
1401.1 Applicability. ¶
1401.1 Applicability. Piping penetrations of required fireresistance-rated walls, partitions, floors, floor/ceiling assemblies, roof/ceiling assemblies, or shaft enclosures shall be protected in accordance with the requirements of the building code, and this chapter.
1402.0 Construction Documents. ¶
1402.1 Penetrations. ¶
1402.1 Penetrations. Construction documents shall indicate with sufficient detail how penetrations of fire-resistancerated assemblies shall be firestopped prior to obtaining design approval.
1403.0 Installation. ¶
1403.1 Materials. Firestop systems shall be installed in ¶
1403.1 Materials. Firestop systems shall be installed in accordance with this chapter, the building code, and the manufacturer’s installation instructions.
1404.0 Combustible Piping Installations. ¶
1404.0 Combustible Piping Installations.
1404.1 General Requirements. Combustible piping ¶
1404.1 General Requirements. Combustible piping installations shall be protected in accordance with the appropriate fire resistance rating requirements in the building code that list the acceptable area, height, and type of construction for use in specific occupancies to assure compliance and integrity of the fire resistance rating prescribed.
1404.2 Fire-Resistance Rating. ¶
1404.2 Fire-Resistance Rating. Where penetrating a fireresistance-rated wall, partition, floor, floor-ceiling assembly, roof-ceiling assembly, or shaft enclosure, the fire-resistance rating of the assembly shall be restored to its original rating.
1404.3 Firestop Systems. Penetrations shall be protected ¶
1404.3 Firestop Systems. Penetrations shall be protected by an approved penetration firestop system installed as tested in accordance with ASTM E119, ASTM E814, UL 263, or UL 1479 with a positive pressure differential of not less than 0.01 of an inch of water (0.002 kPa). Systems shall have an F rating of not less than 1 hour but not less than the required fireresistance rating of the assembly being penetrated. Systems protecting floor penetrations shall have a T rating of not less than 1 hour but not less than the required fire-resistance rating of the floor being penetrated. Floor…
1404.4 Connections. Where piping penetrates a rated ¶
1404.4 Connections. Where piping penetrates a rated assembly, the combustible piping shall not connect to noncombustible piping unless it is capable of being demonstrated that the transition is in accordance with Section 1404.3.
1404.5 Insulation and Coverings. ¶
1404.5 Insulation and Coverings. Insulation and coverings on or in the penetrating item shall not be permitted unless the specific insulating or covering material has been tested as part of the penetrating firestop system.
1404.6 Sleeves. Where sleeves are used, the sleeves shall ¶
1404.6 Sleeves. Where sleeves are used, the sleeves shall be securely fastened to the fire-resistance-rated assembly. The (inside) annular space between the sleeve and the penetrating item and the (outside) annular space between the sleeve and the fire-resistance-rated assembly shall be firestopped in accordance with this chapter.
1405.0 Noncombustible Piping Installations. ¶
1405.0 Noncombustible Piping Installations.
1405.1 General Requirements. Noncombustible piping ¶
1405.1 General Requirements. Noncombustible piping installations shall be protected in accordance with the appropriate fire resistance rating requirements in the building code that list the acceptable area, height, and type of construction for use in specific occupancies to ensure compliance and integrity of the fire-resistance rating prescribed.
1405.2 Fire-Resistance Rating. ¶
1405.2 Fire-Resistance Rating. Where penetrating a fireresistance-rated wall, partition, floor, floor-ceiling assembly, roof-ceiling assembly, or shaft enclosure, the fire-resistance rating of the assembly shall be restored to its original rating. Exceptions: (1) Concrete, mortar, or grout shall be permitted to be used to fill the annular spaces around cast-iron, copper, copper alloy, or steel piping that penetrates concrete or masonry fire-resistant-rated assemblies. The nominal diameter of the penetrating item shall not exceed 6 inches (150 mm), and the opening size shall not exceed 144…
1405.3 Firestop Systems. Penetrations shall be protected ¶
1405.3 Firestop Systems. Penetrations shall be protected by an approved penetration firestop system installed as tested in accordance with ASTM E119, ASTM E814, UL 263, or UL 1479 with a positive pressure differential of not less than 0.01 of an inch of water (0.002 kPa). Systems shall have an F rating of not less than 1 hour but not less than the required fire-resistance rating of the assembly being penetrated. Systems protecting floor penetrations shall have a T rating of not less than 1 hour but not less than the required fire-resistance rating of the floor being penetrated. Floor…
1405.4 Connections. Where piping penetrates a rated ¶
1405.4 Connections. Where piping penetrates a rated assembly, the combustible piping shall not connect to noncombustible piping unless it is capable of being demonstrated ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. FIRESTOP PROTECTION that the transition is in accordance with the requirements of Section 1405.3.
1405.5 Unshielded Couplings. Unshielded couplings ¶
1405.5 Unshielded Couplings. Unshielded couplings shall not be used to connect noncombustible piping unless it is capable of being demonstrated that the fire-resistive integrity of the penetration is maintained.
1405.6 Sleeves. Where sleeves are used, the sleeves shall ¶
1405.6 Sleeves. Where sleeves are used, the sleeves shall be securely fastened to the fire-resistance-rated assembly. The (inside) annular space between the sleeve and the penetrating item and the (outside) annular space between the sleeve and the fire-resistance-rated assembly shall be firestopped in accordance with this chapter.
1405.7 Insulation and Coverings. ¶
1405.7 Insulation and Coverings. Insulation and coverings on or in the penetrating item shall not be permitted unless the specific insulating or covering material has been tested as part of the penetrating firestop system.
1406.0 Required Inspection. ¶
1406.1 General. ¶
1406.1 General. Prior to being concealed, piping penetrations shall be inspected by the Authority Having Jurisdiction to verify compliance with the fire-resistance rating prescribed in the building code.
1406.2 Examination. The Authority Having Jurisdiction ¶
1406.2 Examination. The Authority Having Jurisdiction shall conduct a thorough examination of sufficient representative installations, including destructive inspection, to provide verification of satisfactory compliance with this chapter, the appropriate manufacturer’s installation instructions applied by the installer, construction documents, specifications, and applicable manufacturer’s product information.
1406.3 Penetrations. The Authority Having Jurisdiction ¶
1406.3 Penetrations. The Authority Having Jurisdiction shall determine the type, size, and quantity of penetrations to be inspected.
1406.4 Field Installations. ¶
1406.4 Field Installations. The Authority Having Jurisdiction shall compare the field installations with the documentation supplied by the installer to determine the following: (1) The required F ratings (1 hour, 2 hour, 3 hour, or 4 hour) and T ratings (0 hour, 1 hour, 2 hour, 3 hour, or 4 hour) of the penetration firestop systems are at least the same as the hourly rating of the assembly being penetrated. (2) The penetrating firestop system includes the penetrating item as documented through testing of the systems conducted by an independent testing agency. (3) The penetrating firestop…
1501.0 General. ¶
1501.1 Applicability. ¶
1501.1 Applicability. [BSC-CG, DWR & HCD 1] The provisions of this chapter shall apply to the construction, alteration, discharge, use and repair of alternate water source systems for nonpotable applications. 1501.1.1 Allowable Use of Alternate Water. Where approved or required by the Authority Having Jurisdiction, alternate water sources [reclaimed (recycled) water, gray water, and on-site treated nonpotable gray water] shall be permitted to be used instead of potable water for the applications identified in this chapter.
1501.2 System Design. [BSC-CG, HCD 1 & DWR] ¶
1501.2 System Design. [BSC-CG, HCD 1 & DWR] Alternate water source systems shall be designed in accordance with this chapter by a registered design professional or licensed person who demonstrates competency to design the alternate water source system as required by the Authority Having Jurisdiction . Components, piping, and fittings used in any alternate water source system shall be listed. [BSC-CG & HCD 1] Irrigation design plans shall meet the requirements of the California Code of Regulations, Title 23, Division 2, Chapter 2.7, Model Water Efficient Landscape Ordinance. Exceptions: (1) A…
1501.3 Permit. [BSC-CG, HCD 1 & DWR] It shall be ¶
1501.3 Permit. [BSC-CG, HCD 1 & DWR] It shall be unlawful for a person to construct, install, alter, or cause to be constructed, installed, or altered an alternate water source system in a building or on its premise s without first obtaining a permit to do such work from the Authority Having Jurisdiction. No changes or connections shall be made to either the alternate water source system or the potable water system within a site containing an alternate water source system without approval by the Authority Having Jurisdiction. Exception: [BSC-CG & HCD 1] A construction permit shall not be…
1501.4 Component Identification. System components ¶
1501.4 Component Identification. System components shall be properly identified as to the manufacturer.
1501.5 Maintenance and Inspection. [BSC-CG, HCD ¶
1501.5 Maintenance and Inspection. [BSC-CG, HCD 1 & DWR] Alternate water source systems and components shall be inspected and maintained in accordance with the manufacturer’s recommendations and/or as required by the Authority Having Jurisdiction. [BSC-CG] Where no manu- facturer’s recommendations exist, additional recommenda- tions are listed in Table 1501.5 . Exception: [DWR] Recycled water supply systems that are within or a part of a building shall comply with Section
1505.16 . ¶
1505.16 . 1501.5.1 Maintenance Responsibility. The required maintenance and inspection of alternate water source systems shall be the responsibility of the property owner unless otherwise required by the Authority Having Jurisdiction.
1501.6 Operation and Maintenance Manual. [BSC- ¶
1501.6 Operation and Maintenance Manual. [BSC- CG, HCD 1 & DWR] An operation and maintenance manual for gray water, on-site treated nonpotable water , [DWR] and recycled water supply systems required to have a permit in accordance with Section 1501.3, Section 1505.2, and Section
1506.2 shall be supplied to the building owner by the system ¶
1506.2 shall be supplied to the building owner by the system designer or installer . The operation and maintenance manual shall include the following: (1) Diagram(s) of the entire system and the location of system components. (2) Instructions for operating and maintaining the system. (3) Instructions on maintaining the required water quality for on-site treated nonpotable water systems. (4) Details on startup, shutdown, and deactivating the system for maintenance, repair, or other purposes. (5) Applicable testing, inspection, and maintenance frequencies in accordance with Section 1501.5 [DWR]…
1501.7 Minimum Water Quality Requirements. [BSC- ¶
1501.7 Minimum Water Quality Requirements. [BSC- CG, HCD 1 & DWR] The minimum water quality for alternate water source systems shall meet the applicable water quality requirements for the intended application as determined by the Authority Having Jurisdiction. In the absence of water quality requirements, for on-site treated nonpotable systems, the water quality requirements of IAPMO IGC 324 or NSF/ANSI 350 shall apply. [BSC-CG & HCD 1] Water quality requirements for on-site treated nonpotable graywa- ter shall comply with this section and Section 1506.10.2. Exception s : (1) Water treatment…
1501.8 Material Compatibility. ¶
1501.8 Material Compatibility. Alternate water source systems shall be constructed of materials that are compatible with the type of pipe and fitting materials, water treatment, and water conditions in the system.
1501.9 Signage. [BSC-CG, HCD 1, HCD 2 & HCD 1- ¶
1501.9 Signage. [BSC-CG, HCD 1, HCD 2 & HCD 1- AC] Signage for on-site treated nonpotable gray water shall comply with Sections 1501.9.1 and 1501.9.2. [DWR] Signage for reclaimed (recycled) water shall comply with Section 1505.13. 1501.9. 1 Commercial, Industrial, Institutional , and Residential Restroom Signs. A sign shall be installed in restrooms in commercial, industrial, and institutional occupancies and in residential common use areas using on-site treated nonpotable gray water, for water closets, urinals, or both. Signs shall comply with all applicable requirements of the California…
1501.10 System Controls. Controls for pumps, valves, and ¶
1501.10 System Controls. Controls for pumps, valves, and other devices that contain mercury that come in contact with alternate water source water supply shall not be permitted.
1502.0 Inspection and Testing. ¶
1502.1 General. Alternate water source systems shall be ¶
1502.1 General. Alternate water source systems shall be inspected and tested in accordance with Section 1502.2 through Section 1502.3.3, and/or as required by the Author- ity Having Jurisdiction . Exception: [DWR] Recycled water supply systems that are within or a part of a building shall comply with Section 1505.14.
1502.2 Supply System Inspection and Test. Alternate ¶
1502.2 Supply System Inspection and Test. Alternate water source systems shall be inspected and tested in accordance with this code for testing of potable water piping.
1502.3 Cross-Connection Inspection and Testing. An ¶
1502.3 Cross-Connection Inspection and Testing. An initial visual inspection and initial cross-connection test shall be performed on both the potable and alternate water source systems before the initial operation of the alternate water source system. During an initial or subsequent cross-con- nection test, the potable and alternate water source system shall be isolated from each other and independently inspected and tested to ensure there is no cross-connection in accor dance with Section 1502.3.1 through Section 1502.3.3 . 310 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may…
1502.4 Separation Requirements. Underground alternate ¶
1502.4 Separation Requirements. Underground alternate water source service piping other than gray water shall be separated from the building sewer in accordance with this code. Pipes carrying treated nonpotable water shall be permitted to be run or laid in the same trench as potable water pipes with a 12 inch (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where horizontal piping materials do not comply with this requirement, the minimum separation shall be increased to 60 inches (1524 mm). The potable water piping shall be…
1502.5 Abandonment. Alternate water source systems that ¶
1502.5 Abandonment. Alternate water source systems that are no longer in use or fail to be maintained in accordance with Section 1501.5 shall be abandoned. Abandonment shall comply with Section 1502.5.1 and Section 1502.5.2. 1502.5.1 General. An abandoned system or part thereof covered under the scope of this chapter shall be disconnected from remaining systems, drained, plugged, and capped in an approved manner. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS 1502.5.2…
1502.6 Sizing. ¶
1502.6 Sizing. Unless otherwise provided for in this chapter, alternate water source piping shall be sized in accordance with Chapter 6 for sizing potable water piping.
1503.0 Gray Water Systems. [BSC-CG] Gray water sys- ¶
1503.0 Gray Water Systems. [BSC-CG] Gray water sys- tems shall be verified in accordance with the California Green Building Standards Code (CALGreen), Chapter 5, Division 5.3.
1503.1 General. The provisions of this section shall apply to ¶
1503.1 General. The provisions of this section shall apply to the construction, alteration, and repair of gray water systems. A city, county, or city and county or other local government may adopt, after a public hearing and enactment of an ordinance or resolution, building standards that are more restrictive than the gray water building standards adopted in this code. For addi- tional information, see Health and Safety Code Section 18941.7. (A) All gray water systems shall be designed with a diverter valve to allow the user to direct the flow to the building sewer and either the irrigation…
1503.2 System Requirements. ¶
1503.2 System Requirements. Gray water shall be permitted to be diverted away from a sewer or private sewage disposal system, and discharge to a subsurface irrigation or subsoil irrigation system , or disposal field . The gray water shall be permitted to discharge to a mulch basin residential occupancies . Gray water shall not be used to irrigate root crops or food crops intended for human consumption that comes in contact with soil. 1503.2.1 Surge Capacity. Gray water systems shall be designed to have the capacity to accommodate peak flow rates and distribute the total amount of estimated…
1503.3 Connections to Potable and Reclaimed (Recy- ¶
1503.3 Connections to Potable and Reclaimed (Recy- cled) Water Systems. Gray water systems shall have no direct connection to a potable water supply, on-site treated nonpotable gray water supply, or reclaimed (recycled) water sup- ply systems. Exceptions: (1) Potable water, on-site treated nonpotable gray water, reclaimed (recycled) water , or rainwater is permitted to be used as makeup water for a non-pressurized storage tank provided the connection is protected by an air gap in accordance with this code. (2) A potable water supply may be connected temporarily for the initial…
1503.4 Location. No gray water system or part thereof shall ¶
1503.4 Location. No gray water system or part thereof shall be located on a lot other than the lot that is the site of the building or structure that discharges the gray water, nor shall a gray water system or part thereof be located at a point having less than the minimum distances indicated in Table 1503.4. Exception: When there exists a lawfully recorded perpetual and exclusive covenant to an easement appurtenant and right-of- way between adjoining land-owners of two or more contiguous lots to discharge gray water from one lot to an adjoining lot.
1503.5 Plot Plan Submission. No permit for a gray water ¶
1503.5 Plot Plan Submission. No permit for a gray water system shall be issued until a plot plan with data satisfactory to the Authority Having Jurisdiction has been submitted and approved. Exception: [HCD 1] A construction permit shall not be required for a clothes washer system in compliance with Sec- tion 1503.1.1.
1503.6 Prohibited Location. Where there is insufficient ¶
1503.6 Prohibited Location. Where there is insufficient lot area or inappropriate soil conditions for adequate absorption, no gray water system shall be permitted. ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS TABLE 1503.4 LOCATION OF GRAY WATER SYSTEM [7] MINIMUM HORIZONTAL DISTANCE IN<brCLEAR REQUIRED FROMSURGE TANK<br(feet)SUBSURFACE AND<brSUBSOIL IRRIGATION FIELD<brAND MULCH BED<br(feet)DISPOSAL FIELD ------------ Building structures152, 923, 85 Property line…
1503.7 Drawings and Specifications. ¶
1503.7 Drawings and Specifications. The Authority Having Jurisdiction may require the following information to be included with or in the plot plan before a permit is issued for a gray water system, or at a time during the construction thereof: (1) Plot plan drawn to scale and completely dimensioned, showing lot lines and structures, direction and approximate slope of surface, location of present or proposed retaining walls, drainage channels, water supply lines, wells, paved areas and structures on the plot, number of bedrooms and plumbing fixtures in each structure, location of private…
1503.8 Procedure for Estimating Gray Water Dis- ¶
1503.8 Procedure for Estimating Gray Water Dis- charge. Gray water systems shall be designed to distribute the total amount of estimated gray water on a daily basis. The water discharge for gray water systems shall be determined in accordance with Section 1503.8.1 or Section 1503.8.2. Exception: It is not the intent of this section to require that all gray water must be handled by an irrigation field or disposal field. It is acceptable for excess gray water to be diverted to the building sewer through a diverter valve or overflow drain as permitted in this chapter. 1503.8.1 Residential…
1503.9 Gray Water System Components. Gray water ¶
1503.9 Gray Water System Components. Gray water system components shall comply with Section 1503.9.1 through Section 1503.9.4 . [HCD 1] Gray water system components shall comply with this chapter. 1503.9.1 Surge Tanks. Where installed, surge tanks shall be in accordance with the following: (1) Surge tanks shall be constructed of solid, durable materials not subject to excessive corrosion or decay and shall be watertight. Aboveground surge tanks shall be protected from direct sunlight or shall be constructed of UV resistant materials including but not limited to heavily tinted or opaque…
1504.0 Subsurface Irrigation System Zones. ¶
1504.0 Subsurface Irrigation System Zones.
1504.1 General. ¶
1504.1 General. Irrigation or disposal fields shall be permitted to have one or more valved zones. Each zone shall be of a size to receive the gray water anticipated in that zone.
1504.2 Required Area of Subsurface Irrigation ¶
1504.2 Required Area of Subsurface Irrigation Fields, Subsoil Irrigation Fields, and Mulch Basins. The minimum effective irrigation area of subsurface irrigation fields, subsoil irrigation fields, and mulch basins shall be determined by Table 1504.2 for the type of soil found in the excavation, based upon a calculation of estimated gray water discharge under Section 1503.8. For a subsoil irrigation field, the area shall be equal to the aggregate length of the perforated pipe sections within the valved zone multiplied by the width of the proposed subsoil irrigation field.
1504.3 Determination of Maximum Absorption ¶
1504.3 Determination of Maximum Absorption Capacity. The irrigation field and mulch basin size shall be based on the maximum absorption capacity of the soil and determined using Table 1504.2. For soils not listed in Table 1504.2, the maximum absorption capacity for the proposed site shall be determined by percolation tests or another method acceptable to the Authority Having Jurisdiction. A gray water system shall not be permitted, where the percolation test shows the absorption capacity of the soil is unable to accommodate the maximum discharge of the proposed gray water irrigation system.…
1504.4 Groundwater Level. ¶
1504.4 Groundwater Level. No excavation for an irrigation field, disposal field, or mulch basin shall extend within 3 feet (914 mm) vertical of the highest known seasonal groundwater level, nor to a depth where gray water contaminates the groundwater or surface water. The applicant shall supply evidence of groundwater depth to the satisfaction of the Authority Having Jurisdiction. Note: The absence of groundwater in a test hole three (3) vertical feet (915 mm) below the deepest irrigation or dis- posal point shall be sufficient to satisfy this section unless seasonal high groundwater levels…
1504.5 Irrigation, Disposal Field and Mulch Basin ¶
1504.5 Irrigation, Disposal Field and Mulch Basin Construction. Irrigation fields, disposal fields and mulch basins used in gray water systems shall comply with this sec- tion. Gray water systems may contain either an irrigation field or a disposal field or a combination of both. This section is not intended to prevent the use of other methods of gray water irrigation or disposal approved by the Enforcing Agency. TABLE 1504.2 DESIGN OF SIX TYPICAL SOILS For SI units: 1 square foot = 0.0929 m [2], 1 gallon per day = 0.000043 L/s 316 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and…
1504.6 Reserved. ¶
1504.7 Reserved . ¶
1504.8 Gray Water System Color and Marking Infor- ¶
1504.8 Gray Water System Color and Marking Infor- mation. Pressurized gray water distribution systems shall be identified as containing nonpotable water in accordance with Section 601.3 of this code. Marking shall be at intervals not to exceed 5 feet (1524 mm). Gray water distribution piping upstream of any connection to an irrigation or disposal field or a distribution valve shall be identified with the words “CAU- TION: NONPOTABLE GRAY WATER, DO NOT DRINK.”
1504.9 Other Collection and Distribution Systems. ¶
1504.9 Other Collection and Distribution Systems. Other collection and distribution systems shall be approved by the local Authority Having Jurisdiction, as allowed by Section 301.3 of this code. 1504.9.1 Future Connections. Gray water stub-out plumbing may be allowed for future connection prior to the installation of irrigation lines and landscaping. Stub- out shall be permanently marked “CAUTION: NON- POTABLE GRAY WATER, DO NOT DRINK.”
1504.10 Testing. Building drains and vents for gray water ¶
1504.10 Testing. Building drains and vents for gray water systems shall be tested in accordance with this code. Surge tanks shall be filled with water to the overflow line prior to and during the inspection. Seams and joints shall be left exposed, and the tank shall remain watertight. A flow test shall be performed through the system to the point of gray water discharge. Lines and components shall be watertight up to the point of the irrigation perforated and drip lines.
1504.11 Maintenance. ¶
1504.11 Maintenance. Gray water systems and components shall be maintained in accordance with Section 1501.5.
1505.0 Recycled Water Supply Systems in Buildings . ¶
1505.0 Recycled Water Supply Systems in Buildings .
1505.1 General. The provisions of Section 1505.0 through ¶
1505.1 General. The provisions of Section 1505.0 through Section 1505.16 shall apply to safely plumb buildings with both potable and recycled water supply systems. Unless otherwise specified in this code, the general provisions applying to alter- nate water systems pursuant to Section 1501.0 through Section
1501.10 and Section 1502.4 through Section 1502.6 shall apply ¶
1501.10 and Section 1502.4 through Section 1502.6 shall apply to recycled water supply systems. The provisions in this section encompass the installation, construction, alteration, and repair of recycled water supply systems that are within or a part of a building, including a landscape irrigation system that connects to plumbing that is within or a part of a building, and receive reclaimed (recycled) water provided by a water/wastewater util- ity. When dealing with recycled water supply systems, the Authority Having Jurisdiction and Enforcing Agency may include the recycled water purveyor or…
1505.2 Permit. It shall be unlawful for a person to construct, ¶
1505.2 Permit. It shall be unlawful for a person to construct, install, alter, or cause to be constructed, installed, or altered a recycled water supply system within a building or on its premises without first obtaining a permit to do such work from the Authority Having Jurisdiction. Prior to commencing the issuance of permits for recy- cled water supply systems pursuant to state requirements relating to recycled water, a city, county, city and county or other local agency shall seek consultation with the State Water Resources Control Board, local public health depart- ment and local…
1505.3 System Changes. No changes or connections shall ¶
1505.3 System Changes. No changes or connections shall be made to either the recycled water supply system or the potable water system within a site containing a recycled water supply system without approval by the Authority Having Jurisdiction.
1505.4 Connections to Potable or Recycled Water ¶
1505.4 Connections to Potable or Recycled Water Supply Systems. Recycled water supply systems shall have no direct connection to a potable water supply or alternate water source system. Exceptions: (1) Potable water is permitted to be used as makeup water for a reclaimed (recycled) water storage tank provided the potable water supply inlet is protected by an air gap in accordance with this code. (2) A potable water supply may be connected temporarily for initial testing of the recycled water supply system as provided in Section 1505.14.2.2. Prior to temporarily connecting the potable line to…
1505.5 Water Pressure. ¶
1505.5 Water Pressure. Reclaimed (recycled) water systems supplying water to water closets, urinals, and trap primers shall be capable of delivering not less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the water pressure in the reclaimed water supply system within the building exceeds 80 psi (552 kPa), a pressure reducing valve reducing the pressure to 80 psi (552 kPa) or less to water outlets in the building shall be installed.
1505.6 Initial Cross-Connection Test. A cross-connection ¶
1505.6 Initial Cross-Connection Test. A cross-connection test is required in accordance with Section 1505.14.2.2 . Before the building is occupied or the system is activated, the installer shall perform an initial cross-connection test in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction. The test shall be ruled successful by the Authority Having Jurisdiction before final approval is granted.
1505.7 Recycled Water Supply System Materials. ¶
1505.7 Recycled Water Supply System Materials. Reclaimed (recycled) water supply and distribution system materials shall comply with the requirements of this code for potable water supply and distribution systems unless otherwise provided for in this section.
1505.8 Recycled Water Supply System Color and ¶
1505.8 Recycled Water Supply System Color and Marking Information. All mechanical equipment, including control valves, appurtenant to recycled water supply systems shall be painted purple or composed of purple material matching Pantone color No. 512, 522C or equivalent. Recy- cled water supply systems shall be identified and permanently marked with clearly visible black uppercase lettering on pur- ple background. The identification may be accomplished by labeling metallic and non-metallic piping using purple-col- ored (Pantone color No. 512) adhesive Mylar PVC tape affixed along the entire…
1505.9 Valves. Valves, except fixture supply control valves, ¶
1505.9 Valves. Valves, except fixture supply control valves, shall be equipped with a locking feature. 1505.9.1 Valve Seals. The master reclaimed (recycled) water shut-off valve and/or the reclaimed (recycled) water meter curb cock and each valve within a wall shall be sealed after the recycled water supply system has been approved and placed into operation. These seals shall be either crimped lead wire seal or plastic break away seal which, if broken after system approval, shall be deemed conclusive evidence that the recycled water supply sys- tem has been accessed. The seals shall be…
1505.13 Signage . Signs in rooms and water closet tanks in ¶
1505.13 Signage . Signs in rooms and water closet tanks in buildings using reclaimed (recycled) water shall be in accordance with Section 1505.13.1, Section 1505.13.2, and Section 1505.13.3. Signs on access doors to valves and appurtenances shall be in accordance with Section 1505.9.2 . 1505.13.1 Commercial, Industrial, Institutional, and Residential Restroom Signs. A sign shall be installed in each restroom of commercial, industrial, and institutional occupancies, and in residential common use areas using reclaimed (recycled) water for water clos- ets, urinals, or both. Each sign shall…
1505.14 Inspection and Testing. Recycled water supply ¶
1505.14 Inspection and Testing. Recycled water supply systems shall be inspected and tested in accordance with Section 1505.14.1 and Section 1505.14.2. The reclaimed (recy- cled) water purveyor or other designated appointee may substitute for the Authority Having Jurisdiction for the pur- pose of inspections and tests pursuant to this section . 1505.14.1 Supply System Inspection and Test. Recycled water supply systems shall be inspected and tested in accordance with this code for testing of potable water piping. 1505.14.2 Cross-Connection Inspection and Test- ing. An initial visual inspection…
1505.10 Hose Bibbs. Hose bibbs shall not be allowed on ¶
1505.10 Hose Bibbs. Hose bibbs shall not be allowed on reclaimed (recycled) water piping systems. Only quick cou- plers that differs from those installed on the potable water system shall be used on the recycled water piping system in areas subject to public access . Quick couplers supplying reclaimed (recycled) water shall be marked with the words: “CAUTION: NONPOTABLE RECYCLED WATER, DO NOT DRINK,” and one of the symbol s in Figure 1505.10. Exception: In accordance with Health and Safety Code Sec- tion 8117 and Section 8118, hose bibbs are approved for use in cemeteries supplied with…
1505.11 Required Appurtenances. The recycled water ¶
1505.11 Required Appurtenances. The recycled water supply system and the potable water system within the building and the premises shall be provided with the required appurtenances (e.g., valves, air/vacuum relief valves, etc.) to allow for testing as required for a cross-connection test in accordance with Section 1505.14.2 .
1505.12 Pipe Separation in Trenches . ¶
1505.12 Pipe Separation in Trenches . Reclaimed (recycled) water pipes shall be permitted to be run or laid in the same trench as potable water pipes with 12 inches (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where piping materials do not meet this requirement, the minimum horizontal separation shall be increased to 48 inches ( 1220 mm). The potable water piping shall be installed at an elevation above the reclaimed (recycled) water piping. Reclaimed (recycled) water pipes laid in the same trench or crossing building…
1505.15 Minimum Water Quality Requirements for ¶
1505.15 Minimum Water Quality Requirements for Reclaimed (Recycled) Water. The minimum water qual- ity for reclaimed (recycled) water shall meet the applicable water quality requirements of California Code of Regulations, Title 22, Division 4, Chapter 3 (commencing with Section 60301) for disinfected tertiary recycled water and the appli- cable reclaimed (recycled) water use. The reclaimed (recy- cled) water supplier shall supply water in accordance with permits issued by the State Water Resources Control Board or Regional Water Quality Control Board.
1505.16 Maintenance and Inspection. Recycled water ¶
1505.16 Maintenance and Inspection. Recycled water supply systems and components shall be inspected and main- tained in accordance with the manufacturer’s recommendations and/or as required by the Authority Having Jurisdiction. The frequency of testing, inspection, and maintenance shall be in accordance with Table 1505.16. The required inspection and maintenance shall be the responsibility of the property owner, unless otherwise required by the Authority Having Jurisdiction.
1506.0 On-Site Treated Nonpotable Gray Water Sys- ¶
1506.0 On-Site Treated Nonpotable Gray Water Sys- tems.
1506.1 General. The provisions of this section shall apply ¶
1506.1 General. The provisions of this section shall apply to the installation, construction, alteration, and repair of onsite treated nonpotable gray water systems intended to supply uses such as water closets, urinals, trap primers for floor drains and floor sinks, above and belowground irrigation, and other uses approved by the Authority Having Jurisdiction. Other approved nonpotable water sources including swim- ming pool backwash operations, air conditioner condensate, rainwater, cooling tower blow-down water, foundation drainage, steam system condensate, fluid cooler discharge water,…
1506.2 Plumbing Plan Submission. No permit for an ¶
1506.2 Plumbing Plan Submission. No permit for an on-site treated nonpotable gray water system shall be issued until complete plumbing plans, with data satisfactory to the Authority Having Jurisdiction, have been submitted and approved. [BSC-CG & HCD 1] Prior to commencing the issuance of permits for indoor gray water systems pursuant to state requirements relating to graywater, a city, county, city and county or other local agency shall seek consultation with the local public health department to ensure that local pub- lic health concerns are addressed in local standards or ordi- nances, or…
1506.3 System Changes. No changes or connections shall ¶
1506.3 System Changes. No changes or connections shall be made to either the on-site treated nonpotable gray water system or the potable water system within a site containing an on-site treated nonpotable gray water system without approval by the Authority Having Jurisdiction.
1506.4 Connections to Potable or Recycled Water ¶
1506.4 Connections to Potable or Recycled Water Supply Systems. On-site treated nonpotable gray water systems shall have no direct connection to a potable water supply or recycled water supply system. Exceptions: (1) Potable or reclaimed (recycled) water is permitted to be used as makeup water for a non-pressurized storage tank provided the makeup water supply inlet is protected by an air gap in accordance with this code. (2) A potable water supply may be connected temporarily for the initial cross-connection test of the on-site treated non- potable gray water system as provided in Section…
1506.5 Water Pressure. On-site treated non-potable gray ¶
1506.5 Water Pressure. On-site treated non-potable gray water systems supplying water to water closets, urinals, and trap primers shall be capable of delivering not less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the TABLE 1505.16 MINIMUM RECLAIMED (RECYCLED) WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY DESCRIPTION MINIMUM FREQUENCY Inspect and clean filters and screens, and replace (where necessary). [Every 3 months.] Inspect pumps and verify operation. After initial installation and every 12…
1506.11 Valves. Valves, except fixture supply control ¶
1506.11 Valves. Valves, except fixture supply control valves, shall be equipped with a locking feature.
1506.12 Signs. ¶
1506.12 Signs. Signs in buildings using on-site treated nonpotable gray water shall comply with Section s 1501.9, 1501.9.1 and 1501.9.2 and applicable requirements of the Cal- ifornia Building Code .
1506.13 Inspection and Testing. ¶
1506.13 Inspection and Testing. On-site treated nonpotable gray water systems shall be inspected and tested in accordance with Section 1502.1 and/or as required by the Authority Having Jurisdiction . » » » » » » » water pressure in the on-site treated non-potable gray water supply system within the building exceeds 80 psi (552 kPa), a pressure reducing valve reducing the pressure to 80 psi (552 kPa) or less to water outlets in the building shall be installed.
1506.6 Initial Cross-Connection Test. ¶
1506.6 Initial Cross-Connection Test. A cross-connection test is required in accordance with Section 1502.3. Before the building is occupied or the system is activated, the installer shall perform the initial cross-connection test in the presence of the Authority Having Jurisdiction and other authorities having jurisdiction. The test shall be ruled successful by the Authority Having Jurisdiction before final approval is granted.
1506.7 On-Site Treated Nonpotable Gray Water Sys- ¶
1506.7 On-Site Treated Nonpotable Gray Water Sys- tem Materials. On-site treated nonpotable gray water supply, and distribution system materials shall comply with the requirements of this code for potable water supply and distribution systems unless otherwise provided for in this section.
1506.8 On-Site Treated Nonpotable Gray Water ¶
1506.8 On-Site Treated Nonpotable Gray Water Devices and Systems. Devices or equipment used to treat on-site treated nonpotable gray water to maintain the minimum water quality requirements determined by the Authority Having Jurisdiction shall be listed and labeled (third-party certified) by a listing agency (accredited conformity assessment body) or approved for the intended application. Devices or equipment used to treat on-site treated nonpotable gray water for use in the water closet and urinal flushing, surface irrigation, and similar applications shall comply with IAPMO IGC 324,…
1506.9 On-Site Treated Nonpotable Gray Water Sys- ¶
1506.9 On-Site Treated Nonpotable Gray Water Sys- tem Color and Marking Information. On-site treated nonpotable gray water systems shall have a colored background and marking information in accordance with Section 601.3 of this code.
1506.10 Design and Installation. ¶
1506.10 Design and Installation. The design and installation of on-site treated nonpotable gray water systems shall be in accordance with Section 1506.10.1 through Section 1506.10.6 . 1506.10.1 Listing Terms and Installation Instruc- tions. On-site treated nonpotable gray water systems shall be installed in accordance with the terms of its listing and the manufacturer’s installation instructions. 1506.10.2 Minimum Water Quality. [BSC-CG & HCD 1] On-site treated nonpotable gray water supplied to toilets or urinals or for other uses in which it is sprayed or exposed shall be disinfected.…
1601.0 General. ¶
1601.1 Applicability. The provisions of this chapter shall ¶
1601.1 Applicability. The provisions of this chapter shall apply to the installation, construction, alteration, and repair of nonpotable rainwater catchment systems. 1601.1.1 Allowable Use of Alternate Water. Where approved or required by the Authority Having Jurisdiction, rainwater shall be permitted to be used instead of potable water for the applications identified in this chap ter.
1601.2 System Design. Rainwater catchment systems shall ¶
1601.2 System Design. Rainwater catchment systems shall be designed in accordance with this chapter by a person registered or licensed to perform plumbing design work or who demonstrates competency to design the rainwater catchment system as required by the Authority Having Jurisdiction . Components, piping, and fittings used in a rainwater catchment system shall be listed. [HCD 1] Irrigation design plans shall meet the requirements of the California Code of Regulations, Title 23, Division 2, Chapter 2.7, Model Water Efficient Landscape Ordinance. Exceptions: (1) A person registered or…
1601.3 Permit. It shall be unlawful for a person to construct, ¶
1601.3 Permit. It shall be unlawful for a person to construct, install, alter, or cause to be constructed, installed, or altered a nonpotable rainwater catchment system in a building or on a premise without first obtaining a permit to do such work from the Authority Having Jurisdiction. Exceptions: (1) A permit is not required for exterior rainwater catchment systems used for outdoor non-spray irrigation with a maximum storage capacity of 5000 gallons (18 927 L) where the tank is supported directly upon grade and the ratio of height to diameter or width does not exceed 2 to 1 and it does not…
1601.4 Component Identification. System components ¶
1601.4 Component Identification. System components shall be properly identified as to the manufacturer.
1601.5 Maintenance and Inspection. ¶
1601.5 Maintenance and Inspection. Rainwater catchment systems and components shall be inspected and maintained in accordance with with the manufacturer’s recommendations and/or as required by the enforcing agency . TABLE 1601.5 MINIMUM ALTERNATE WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY DESCRIPTIONMINIMUM FREQUENCY ------ <br <br <brInspect and clean filters and<brscreens, and replace (where<brnecessary).Every 3 months <br <br <br <br <br <brInspect and verify that<brdisinfection, filters, and water<brquality treatment devices and<brsystems are operational and<brmaintaining…
1601.6 Operation and Maintenance Manual. ¶
1601.6 Operation and Maintenance Manual. An operation and maintenance manual for rainwater catchment systems required to have a permit in accordance with Section 1601.3, shall be supplied to the building owner by the system designer or installer . The operating and maintenance manual shall include the following: (1) Diagram(s) of the entire system and the location of system components. (2) Instructions for operating and maintaining the system. (3) Instructions on maintaining the required water quality as for rainwater catchment systems . (4) Details startup, shutdown, and deactivating the…
1601.7 Minimum Water Quality Requirements. The ¶
1601.7 Minimum Water Quality Requirements. The minimum water quality for rainwater catchment systems shall comply with the applicable water quality requirements for the intended application as determined by the Authority Having Jurisdiction. Water quality for nonpotable rainwater catchment systems shall comply with Section 1603.4. In the absence of water quality requirements for harvested rainwa- ter, Table 1603.4 shall apply. Exceptions: (1) Water treatment is not required for rainwater catchment systems used for aboveground irrigation with a maximum storage capacity of 360 gallons (1363 L).…
1601.8 Material Compatibility. ¶
1601.8 Material Compatibility. Rainwater catchment systems shall be constructed of materials that are compatible with the type of pipe and fitting materials, water treatment, and water conditions in the system.
1601.9 System Controls. Controls for pumps, valves, and ¶
1601.9 System Controls. Controls for pumps, valves, and other devices that contain mercury that come in contact with rainwater supply shall not be permitted.
1601.10 Separation Requirements. ¶
1601.10 Separation Requirements. Underground rainwater catchment service piping shall be separated from the building sewer in accordance with Section 609.2. Treated nonpotable water pipes shall be permitted to be run or laid in the same trench as potable water pipes with a 12 inch (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where horizontal piping materials do not meet this requirement, the minimum separation shall be increased to 60 inches (1524 mm). The potable water piping shall be installed at an elevation above the…
1601.11 Abandonment. Rainwater catchment systems that ¶
1601.11 Abandonment. Rainwater catchment systems that are no longer in use, or fail to be maintained in accordance with Section 1601.5, shall be abandoned. Abandonment shall comply with Section 1601.11.1 and Section 1601.11.2. 1601.11.1 General. An abandoned system or part thereof covered under the scope of this chapter shall be disconnected from remaining systems, drained, plugged, and capped in an approved manner. 1601.11.2 Underground Tank. An underground water storage tank that has been abandoned or otherwise discontinued from use in a system covered under the scope of this chapter shall…
1601.12 Sizing. ¶
1601.12 Sizing. Unless otherwise provided for in this chapter, rainwater catchment piping shall be sized in accordance with Chapter 6 for sizing potable water piping.
1602.0 Nonpotable Rainwater Catchment Systems. ¶
1602.0 Nonpotable Rainwater Catchment Systems.
1602.1 General. The installation, construction, alteration, ¶
1602.1 General. The installation, construction, alteration, and repair of rainwater catchments systems intended to supply uses such as water closets, urinals, trap primers for floor drains and floor sinks, irrigation, industrial processes, water features, cooling tower makeup and other uses shall be approved by the Authority Having Jurisdiction. Rainwater catchment systems for collecting precipitation from rooftops shall comply with ARCSA/ASPE/ANSI 63.
1602.2 Plumbing Plan Submission. No permit for a ¶
1602.2 Plumbing Plan Submission. No permit for a rainwater catchment system shall be issued until complete plumbing plans, with data satisfactory to the Authority Having Jurisdiction, have been submitted and approved.
1602.3 System Changes. No changes or connections shall ¶
1602.3 System Changes. No changes or connections shall be made to either the rainwater catchment system or the potable water system within a site containing a rainwater catchment system requiring a permit without approval by the Authority Having Jurisdiction.
1602.4 Connections to Potable or Reclaimed (Recy- ¶
1602.4 Connections to Potable or Reclaimed (Recy- cled) Water Systems. Rainwater catchment systems shall have no direct connection to a potable water supply or alternate water source system. Exceptions: (1) Potable water, on-site treated nonpotable gray water, or reclaimed (recycled) water is permitted to be used as makeup water for a rainwater catchment system provided the connection is protected by an air gap in accordance with this code. (2) A potable water supply may be connected temporarily for the initial cross-connection test of the rainwater catchment system as required in Section…
1602.5 Initial Cross-Connection Test. Where a portion ¶
1602.5 Initial Cross-Connection Test. Where a portion of a rainwater catchment system is installed within a building, a cross-connection test is required in accordance with Section 1605.3. Before the building is occupied or the system is activated, the installer shall perform the initial cross-connection test in the presence of the Authority Having Jurisdiction and other authorities having jurisdiction. The test shall be ruled successful by the Authority Having Jurisdiction before final approval is granted.
1602.6 Sizing. ¶
1602.6 Sizing. The design and size of rainwater drains, gutters, conductors, and leaders shall comply with Chapter 11 of this code. 328 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. NONPOTABLE RAINWATER CATCHMENT SYSTEMS
1602.7 Rainwater Catchment System Materials. ¶
1602.7 Rainwater Catchment System Materials. Rain- 1603.3 Rainwater Catchment Collection Surfaces. water catchment system materials shall comply with Section Rainwater shall be collected from roof surfaces or other 1602.7.1 through Section 1602.7.3 . impervious manmade, aboveground collection surfaces. 1602.7.1 Water Supply and Distribution Materi- 1603.3.1 Other Surfaces. Natural precipitation colals. Rainwater catchment water supply and distribution lected from surface water runoff, vehicular parking surmaterials shall comply with the requirements of this code faces, or manmade surfaces at…
1602.8 Rainwater Catchment System Color and ¶
1602.8 Rainwater Catchment System Color and
1603.4 Minimum Water Quality. The minimum water ¶
1603.4 Minimum Water Quality. The minimum water Marking Information. Rainwater catchment systems shall quality for harvested rainwater shall meet the applicable water have a colored background in accordance with Section 601.3. quality requirements for the intended applications as deter Rainwater catchment systems shall be marked, in lettering in mined by the Authority Having Jurisdiction. In the absence of accordance with Section 601.3.3, with the words: “CAU water quality requirements determined by the Authority Hav TION: NONPOTABLE RAINWATER, DO NOT DRINK.” ing Jurisdiction, the minimum…
1602.9 Deactivation and Drainage for Cross-Connec- shall be in accordance with Table… ¶
1602.9 Deactivation and Drainage for Cross-Connec- shall be in accordance with Table 1603.4, IAPMO IGC 324 tion Test. The rainwater catchment system and the potable or NSF/ANSI 350. water system within the building shall be provided with the Exception [BSC] : No treatment is required for rainwater required appurtenances (e.g., valves, air or vacuum relief used for subsurface or nonsprinkled surface irrigation where valves, etc.) to allow for deactivation or drainage as required for the maximum storage volume is less than 5000 gallons (18 a cross-connection test in accordance with Section…
1603.0 Design and Installation. 1603.4.1 Disinfection. Where the initial quality of the ¶
1603.0 Design and Installation. 1603.4.1 Disinfection. Where the initial quality of the collected rainwater requires disinfection or other treat-
1603.1 Rainwater Catchment Systems. The design and ¶
1603.1 Rainwater Catchment Systems. The design and ment or both, the collected rainwater shall be treated as installation of nonpotable rainwater catchment systems shall necessary to ensure the required water quality is deliv- be in accordance with Section 1603.2 through Section 1603.20. ered at the point of use. Where chlorine is used for dis-
1603.2 Outside Hose Bibbs. ¶
1603.2 Outside Hose Bibbs. Outside hose bibbs shall be infection or treatment, water shall be tested for residual allowed on rainwater piping systems. Hose bibbs supplying chlorine in accordance with ASTM D1253. The levels of rainwater shall be marked with the words: “CAUTION: residual chlorine shall not exceed the levels allowed for NONPOTABLE RAINWATER, DO NOT DRINK” and in the intended use in accordance with the requirements of Figure 1603.2. the local enforcing agency.
1603.5 Rainwater Storage Tanks. Rainwater storage tanks ¶
1603.5 Rainwater Storage Tanks. Rainwater storage tanks shall comply with IAPMO/ANSI Z1002 and be installed in accordance with Section 1603.6 through Section 1603.12.
1603.6 Location. ¶
1603.6 Location. Rainwater storage tanks shall be permitted to be installed above or below grade.
1603.7 Above Grade. Above grade, storage tanks shall be ¶
1603.7 Above Grade. Above grade, storage tanks shall be of an opaque material, approved for aboveground use in direct sunlight or shall be shielded from direct sunlight. Tanks shall be installed in an accessible location to allow for inspection and cleaning. The tank shall be installed on a foundation or platform that is constructed to accommodate loads in accordance with the California Building Code . Exception: Tanks may be installed directly on grade in accor- dance with Section 1601.3. FIGURE 1603.2 1603.8 Below Grade. Rainwater storage tanks installed below grade shall be structurally…
1603.9 Drainage and Overflow. Rainwater storage tanks ¶
1603.9 Drainage and Overflow. Rainwater storage tanks shall be provided with a means of draining and cleaning. The overflow drain shall not be equipped with a shutoff valve. The overflow outlet shall discharge in accordance with this code for storm drainage systems. Where discharging to the storm drainage system, the overflow drain and tank drain shall be protected from backflow of the storm drainage system by a backwater valve or other approved method. Back- water valves shall be installed so that access is provided to the working parts for service and repair. 1603.9.1 Overflow Outlet Size.…
1603.10 Opening and Access Protection. Rainwater ¶
1603.10 Opening and Access Protection. Rainwater tank openings shall be protected to prevent the entrance of insects, birds, or rodents into the tank and piping systems . Rainwater tank access openings exceeding 12 inches (305 mm) in diameter shall be secured to prevent tampering and unintended entry by either a lockable device or other approved method. (A) Animals and Insects. Screens installed on vent pipes, inlets, and overflow pipes shall have an aperture of not greater than [1] ∕ 16 of an inch (1.6 mm) and shall be close fit- ting. (B) Human Access. A minimum of one access opening shall…
1603.11 Marking. Rainwater tanks shall be permanently ¶
1603.11 Marking. Rainwater tanks shall be permanently marked with the capacity and the language: “NONPOTABLE RAINWATER.” Where openings are provided to allow a person to enter the tank, the opening shall be marked with the following language: “DANGER-CONFINED SPACE.”
1603.12 Storage Tank Venting. Where venting using ¶
1603.12 Storage Tank Venting. Where venting using drainage or overflow piping is not provided or is considered insufficient, a vent shall be installed on each tank. The vent shall extend from the top of the tank and terminate not less than 6 inches (152 mm) above grade and shall be provided with a vent sized in accordance with this code, and based on the size of the influent pipe . The vent terminal shall be directed downward and covered with a [1] ∕ 16 of an inch ( 1.6 mm) mesh screen to prevent the entry of vermin and insects. Tank vent pipes shall not be connected to the sanitary drainage…
1603.13 Pumps. ¶
1603.13 Pumps. Pumps serving rainwater catchment systems shall be listed. Pumps supplying water to water closets, urinals, and trap primers shall be capable of delivering not « « « « « « 330 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. NONPOTABLE RAINWATER CATCHMENT SYSTEMS CAUTION NONPOTABLE RAINWATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING WATER SYSTEM. NOTICE: CONTACT BUILDING MANAGE MENT BEFORE PERFORMING ANY WORK ON THIS WATER SYSTEM. This sign shall be posted in a location that is…
1605.0 Inspection and Testing. ¶
1605.1 General. Rainwater catchment systems shall be ¶
1605.1 General. Rainwater catchment systems shall be inspected and tested in accordance with Section 1605.2 and Section 1605.3.
1605.2 Supply System Inspection and Test. Rainwater ¶
1605.2 Supply System Inspection and Test. Rainwater catchment systems shall be inspected and tested in accordance with the applicable provisions of this code for testing of potable water and storm drainage systems. Storage tanks shall be filled with water to the overflow opening for a period of 24 hours, and during the inspection, or by other means as approved by the Authority Having Jurisdiction. Seams and joints shall be exposed during the inspection and checked for watertightness.
1605.3 Cross-Connection Inspection and Testing. An ¶
1605.3 Cross-Connection Inspection and Testing. An initial visual inspection and an initial cross-connection test shall be performed on both the potable and rainwater catchment water systems before the initial operation of the rain- water catchment system. During an initial or subsequent cross-connection test, the potable and rainwater catchment water systems shall be isolated from each other and independently inspected and tested to ensure there is no crossconnection in accordance with Section 1602.5. Initial or subsequent inspections or tests shall be performed in accordance with Section…
1603.14 Roof Drains. Primary and secondary roof drains, ¶
1603.14 Roof Drains. Primary and secondary roof drains, conductors, leaders, and gutters shall be designed and installed in accordance with this code.
1603.15 Water Quality Devices and Equipment. ¶
1603.15 Water Quality Devices and Equipment. Devices and equipment used to treat rainwater to maintain the minimum water quality requirements determined by the Authority Having Jurisdiction shall be listed or labeled (thirdparty certified) by a listing agency (accredited conformity assessment body) and approved for the intended application.
1603.16 Freeze Protection. Tanks and piping installed in ¶
1603.16 Freeze Protection. Tanks and piping installed in locations subject to freezing shall be provided with an approved means of freeze protection.
1603.17 Debris Removal. ¶
1603.17 Debris Removal. The rainwater catchment conveyance system shall be equipped with a debris excluder or other approved means to prevent the accumulation of leaves, needles, other debris and sediment from entering the storage tank. Devices or methods used to remove debris or sediment shall be accessible and sized and installed in accordance with manufacturer’s installation instructions.
1603.18 Required Filters. A filter permitting the passage ¶
1603.18 Required Filters. A filter permitting the passage of particulates not larger than 100 microns (100 µm) shall be provided for rainwater supplied to water closets, urinals, trap primers, and drip irrigation system s .
1603.19 Roof Gutters. Gutters shall maintain a minimum ¶
1603.19 Roof Gutters. Gutters shall maintain a minimum slope and be sized in accordance with Section 1103.3.
1603.20 Rainwater Diversion Valves. ¶
1603.20 Rainwater Diversion Valves. Rainwater diversion valves ranging from 2 inches (50 mm) through 12 inches (300 mm) in diameter shall be an approved diverter valve . Valves shall be readily accessible and include a filter located upstream of the valve when required.
1604.0 Signs. ¶
1604.1 General. Signs in buildings using rainwater shall be ¶
1604.1 General. Signs in buildings using rainwater shall be in accordance with Section 1604.2 and Section 1604.3 , and applicable requirements of the California Building Code .
1604.2 Commercial, Industrial, Institutional and Res- ¶
1604.2 Commercial, Industrial, Institutional and Res- idential Restroom Signs. A sign shall be installed in restrooms in commercial, industrial, and institutional occupancies , and in residential common use areas using nonpotable rainwater for water closets, urinals, or both. Signs shall comply with all applicable requirements of the Califor- nia Building Code. Each sign shall contain the following text: TO CONSERVE WATER, THIS BUILDING USES RAINWATER TO FLUSH TOILETS AND URINALS.
1604.3 Equipment Room Signs. Each equipment room ¶
1604.3 Equipment Room Signs. Each equipment room containing nonpotable rainwater equipment shall have a sign posted with the following wording in 1 inch (25.4 mm) let ters: ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. NONPOTABLE RAINWATER CATCHMENT SYSTEMS (3) Fixtures, potable, and rainwater shall be tested and inspected for flow. Flow from a rainwater catchment water system outlet shall indicate a cross-connection. No flow from a potable water outlet shall indicate that it is connected to the rainwater system. (4) The…
1701.0 General. ¶
1701.1 Standards. The standards listed in Table 1701.1 are ¶
1701.1 Standards. The standards listed in Table 1701.1 are referenced in various sections of this code and shall be con sidered part of the requirements of this document. The standards are listed herein by the standard number and effective date, the title, application and the section(s) of this code that references the standard. The application of the referenced standard(s) shall be as specified in Section 301.2.2. The promulgating agency acronyms referred to in Table 1701.1 are defined in a list found at the end of the tables. TABLE 1701.1 Col1REFERENCED STANDARDSCol3Col4 ------------…
1701.2 Standards, Publications, Practices, and ¶
1701.2 Standards, Publications, Practices, and Guides. The standards, publications, practices, and guides listed in Table 1701.2 are not referenced in other sections of this code. The application of the referenced standards, publi cations, practices, and guides shall be as specified in Section 301.2.2. The promulgating agency acronyms are found at the end of the tables. TABLE 1701.2 Col1STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDESCol3 --------- DOCUMENT NUMBERDOCUMENT TITLEAPPLICATION AHAMAHAMAHAM AHAM FWD-1-2016Food Waste DisposersAppliances ARCSAARCSAARCSA ARCSA/ASPE 78-2015Stormwater…
10.1 Hot-Work Joints ¶
10.1 Hot-Work Joints Hot-work joints (e.g., soldering, brazing, welding, and fusion-welding) shall be (a) made at least 500 mm (18 in) from PEX tubing in the same water line; and (b) performed prior to completing the PEX joints.
10.2 Bending Radius ¶
10.2 Bending Radius 10.2.1 The free (unsupported) bending radius for PEX tubing, measured at the outside of the bend, shall be not less than six times the actual outside diameter of the tubing, unless otherwise specified by the PEX manufacturer. Supports should be used to facilitate rigid bends and to alleviate stress on PEX joints when bends are needed in close proximity to such joints. 10.2.2 Tighter bends may be used when the PEX tubing is uniformly bent (supported) around a curved bracket or other rigid fixture. In this case, the minimum outside radius of the supported bend shall be as…
10.3 Directional Fittings ¶
10.3 Directional Fittings Directional fittings (e.g., 90º and 45º elbows) should only be installed where necessary. Note: The flexible nature of PEX tubing allows for sweeping bends resulting in less fittings and joints.
10.4 Direct Burial ¶
10.4 Direct Burial PEX tubing and fittings may be used in direct burial applications when allowed in the manufacturer’s written installation instructions. 458 2025 CALIFORNIA PLUMBING CODE ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties. IS 31 Note: AWWA C904 should be consulted for water service applications.
10.5 Fire-Resistive Construction ¶
10.5 Fire-Resistive Construction Manufacturer’s installation instructions shall be consulted prior to installation of PEX tubing in fire resistive constructions. PEX tubing penetrating a wall or floor-and-ceiling fire-rated assembly shall include a means of passive fire protection in accordance with the local codes.
10.6 Sizing and Flow Velocities ¶
10.6 Sizing and Flow Velocities 10.6.1 PEX tubing shall be sized in accordance with IAPMO/ANSI UPC 1. Note: Potable water piping sizing is addressed in Chapter 6 and Appendix A of IAPMO/ANSI UPC 1. 10.6.2 The tubing manufacturer’s pressure-loss data should be referenced when using Appendix A of IAPMO/ANSI UPC 1. In absence of such data, Figures 3 and 4 shall be used. 10.6.3 Flow velocities through the water distribution system, used for calculating flush tank and flush valve fixture units depending on the tubing sizes (see Table 1), shall not exceed (a) 3.0 m/s (10 ft/s) for cold-water…
10.7 Installation Testing ¶
10.7 Installation Testing Installation of PEX water distribution systems may be tested with air when (a) expressly allowed in the written instructions of the manufacturers of all plastic pipe and fittings installed at the time the PEX piping system is being tested; and (b) compressed air or other gas testing is not prohibited by the authority having jurisdiction. Note: LB = C × √ (D × Δ L) where LB = length of flexible arm C = material constant (12 for PEX) D = nominal outside diameter of tubing Δ L = thermal expansion length FIGURE 1 EXPANSION ARMS (See Sections 6.4.1 and 7.3) ), Copyright ©…
1506.0 – 1506.3 ¶
1506.0 – 1506.3 System changes . . . . . . . . . . . . . . . . . . . . . . . . .1506.3 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1501.1.1 OPEN TRENCH WORK . . . . . . . . . . . . . . . . . . . . . . . .314.3 OPENING, EFFECTIVE, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207.0 OSHPD 1R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.8 OVERFLOWS . . . . . . .404.2, 413.5, 607.5, 1603.9, 1603.9.1 – P – PATIENT CARE SPACE, DEFINITION . . . . . . . . . . . . .218.0 PENALTIES . . . . . . . . . . . . . . . . . . . . . .…