CPC · California Plumbing Code
Scope & Minimum Standards (Chapter 3)
Chapter 3 of the California Plumbing Code sets the cross‑cutting minimum installation, safety, and approval rules that apply across the plumbing code.
Last reviewed: July 6, 2026
Overview
Chapter 3 of the California Plumbing Code is the code’s “general regulations” chapter: it sets the baseline rules that apply to plumbing installation and work practices that are not covered in later, topic-specific chapters. Chapter 3 frames minimum requirements for safe installation, material identification, supports and penetrations, and methods of approval so plumbing systems protect public health, property and structural integrity .
Why it matters: these provisions are the first stop for plan reviewers, installers, and inspectors when a question is procedural (what must be labeled, how piping may be routed or sleeved, or when an alternate material needs approval). They tie the administration and scope of the CPC back to the overall code purpose and enforcement framework (see the code’s scope and purpose provisions such as §1.1.3) and to chapter-level requirements throughout the CPC .
Key places to look in practice are the Chapter 3 general sections (titles and introductory rules), the referenced standards and approval language used to accept materials and methods, and related state-adopted amendments (Chapter 3 works alongside chapter-specific rules such as those for alternate water sources in §1502.5 to ensure consistent minimum standards) .
In this section
Code references
Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:
CPC § 3.14 High relevance — show source text
Title 19, Division 1]||||X|||||||||||||||||||| |Chapter / Section|||||||||||||||||||||||| |301|||X||||||||||||||||||||| |[T-19 §3.14]||||X|||||||||||||||||||| |[T-19 §3.19 (a-g)]||||X|||||||||||||||||||| |302|||X||||||||||||||||||||| |304|||X||||||||||||||||||||| |[T-19 §3.07(a)]||||X|||||||||||||||||||| |[T-19 §3.07(b)]||||X|||||||||||||||||||| |[T-19 §3.19 (b)(c)]||||X|||||||||||||||||||| |308.1.1|||X||||||||||||||||||||| |[T-19 §3.25 (a)(b)]||||X|||||||||||||||||||| |308.5|||X||||||||||||||||||||| |310.2|||X||||||||||||||||||||| |[T-19 §3.32 (a)(b)]||||X|||||||||||||||||||| |[T-19 §3.32 (d)]||||X|||||||||||||||||||| |310.3|||X||||||||||||||||||||| |[T-19 §3.32 (c)]||||X|||||||||||||||||||| |312 - 316|||X||||||||||||||||||||| |[T-19 §3.05 (b)]||||X|||||||||||||||||||| |317|||X||||||||||||||||||||| |319 - 322|||X||||||||||||||||||||| |323|||X|||||||||||||||||||||- The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Fire Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
2025 CALIFORNIA FIRE CODE 3-1
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
3-2 2025 CALIFORNIA FIRE CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
PART II— GENERAL SAFETY PROVISIONS
3 GENERAL REQUIREMENTS
User notes:
About this chapter: Chapter 3 provides general requirements for asphalt kettles, combustible waste material, ignition sources, motion picture projection rooms and film, open burning, recreational fires, portable outdoor fireplaces, open flames, powered industrial trucks and equipment, smoking, vacant premises, vehicle impact protection, fueled equipment, indoor displays, general storage, outdoor pallet storage, hazards to firefighters, landscaped roofs, laundry carts, mobile food preparation vehicles, additive manufacturing (3D printing) and artificial combustible vegetation. These are intended to improve premises safety for everyone, including construction workers, tenants, operations and maintenance personnel, and emergency response personnel.
SECTION 301—GENERAL
301.1 Scope. The provisions of this chapter shall govern the occupancy and maintenance of all structures and premises for precautions against fire and the spread of fire and general requirements of fire safety.
California Plumbing Code High relevance — show source text
Chapter 1 Administration.
Chapter 1 regulates the application, enforcement, and administration of subsequent requirements of the code. As well as establishing the scope of the code, this chapter is concerned with enforcing the requirements contained in the body of the code. A plumbing code, as with any other code, is intended to be adopted as a legally enforceable document to safeguard health, safety, property, and public welfare. The code cannot be effective without satisfactory provisions for its administration and enforcement. The Authority Having Jurisdiction is to review the proposed and completed work and to decide whether a plumbing system conforms to the code requirements. As a public servant, the Authority Having Jurisdiction enforces the code in an unbiased, proper manner. The design professional is responsible for the design of a safe plumbing system. The contractor is responsible for installing the system in accordance with the plans.
Chapter 2 Definitions.
To maintain consistency and encourage the use of common terminology, Chapter 2 establishes definitions to provide clarity of terms and promote the use of a common language throughout the code. Understanding definitions within the context of their application enables greater collaboration, efficiency, standardization, and interpretation in applying and enforcing terms used throughout the code. Codes are technical documents, and every term can impact the meaning of the code text. Terms not defined have a normally accepted meaning.
Chapter 3 General Regulations.
Chapter 3 regulates the general requirements, not specific to other chapters, for installing plumbing systems. Many regulations are not specific plumbing requirements but relate to the overall plumbing system. This chapter contains safety requirements for installing plumbing and also contains nonplumbing requirements for identifying pipes, pipe fittings, traps, fixtures, materials, and devices used in plumbing systems. Listing method of approval, based on applicable nationally recognized standards, for the safe and proper installation of plumbing systems, is essential to ensure the protection of public health, safety, and welfare. The safety requirements provide protection for piping, material, and structures, with provisions for installation practices, removing stress and strain of the pipe, sleeving, and hanger support. The building’s structural stability is protected by the regulations for cutting and notching of structural members.
Chapter 4 Plumbing Fixtures and Fixture Fittings.
This chapter regulates the minimum number of plumbing fixtures of a specific type and quality for each building. The fixtures must be properly installed to be usable by the individuals occupying the building. The quality and design of every fixture must conform to the applicable referenced standard. Compliance with this chapter will result in a building or structure having acceptable plumbing fixtures for the sanitary, hygienic, cleaning, washing, and food preparation needs of the occupants. In addition to ensuring resilient fixtures, the chapter also takes into consideration gender-neutral facilities and contains provisions for privacy compartments.
Chapter 5 Water Heaters.
Chapter 5 regulates the design, approval, installation, and safety devices of fuel burning and other types of water heaters with the combustion air requirements for ventilation and dilution of flue gases for appliances installed in buildings. This chapter does not apply to direct-vent appliances. In addition, this chapter regulates the design, construction, installation, and maintenance of chimneys, vents, and their connections to fuel-burning appliances. Methods to supply combustion air may be supplied from an indoor air supply, outdoor air supply, a combination of indoor and outdoor air supply, mechanical air supply, or an engineered system. Combustion air provisions are based on the number of openings and the total
CPC § 2025 High relevance — show source text
Gas Piping| |13|Health Care Facilities and Medical Gas and Medical Vacuum Systems| |14|Firestop Protection| |15|Alternate Water Sources for Nonpotable Applications| |16|Nonpotable Rainwater Catchment Systems| |17|Referenced Standards| |Appendix A|Recommended Rules for Sizing the Water Supply System| |Appendix B|Explanatory Notes on Combination Waste and Vent Systems| |Appendix C|Alternate Plumbing Systems| |Appendix D|Sizing Storm Water Drainage Systems| |Appendix E|Manufactured/Mobile Home Parks and Recreational Vehicle Parks| |Appendix F|Firefighter Breathing Air Replenishment Systems| |Appendix G|Sizing of Venting Systems| |Appendix H|Private Sewage Disposal Systems| |Appendix I|Installation Standards| |Appendix J|Combination of Indoor and Outdoor Combustion and Ventilation Opening Design| |Appendix K|Potable Rainwater Catchment Systems| |Appendix L|Sustainable Practices| |Appendix M|Peak Water Demand Calculator| |Appendix N|Impact of Water Temperature on the Potential for Scalding and Legionella Growth| |Appendix O|Non-Sewered Sanitation Systems| |Appendix P|Professional Qualifications| |Appendix Q|Indoor Horticultural Facilities| |Appendix R|Tiny Houses| |Appendix S|Onsite Stormwater Treatment Systems|
2025 CALIFORNIA PLUMBING CODE xiii
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
FORMAT OF THE UNIFORM PLUMBING CODE
The following is a summary of the scope and intent of the provisions addressed within the chapters and appendices of the Uniform Plumbing Code :
Chapter 1 Administration.
Chapter 1 regulates the application, enforcement, and administration of subsequent requirements of the code. As well as establishing the scope of the code, this chapter is concerned with enforcing the requirements contained in the body of the code. A plumbing code, as with any other code, is intended to be adopted as a legally enforceable document to safeguard health, safety, property, and public welfare. The code cannot be effective without satisfactory provisions for its administration and enforcement. The Authority Having Jurisdiction is to review the proposed and completed work and to decide whether a plumbing system conforms to the code requirements. As a public servant, the Authority Having Jurisdiction enforces the code in an unbiased, proper manner. The design professional is responsible for the design of a safe plumbing system. The contractor is responsible for installing the system in accordance with the plans.
Chapter 2 Definitions.
To maintain consistency and encourage the use of common terminology, Chapter 2 establishes definitions to provide clarity of terms and promote the use of a common language throughout the code. Understanding definitions within the context of their application enables greater collaboration, efficiency, standardization, and interpretation in applying and enforcing terms used throughout the code. Codes are technical documents, and every term can impact the meaning of the code text. Terms not defined have a normally accepted meaning.
Chapter 3 General Regulations.
Chapter 3 regulates the general requirements, not specific to other chapters, for installing plumbing systems. Many regulations are not specific plumbing requirements but relate to the overall plumbing system. This chapter contains safety requirements for installing plumbing and also contains nonplumbing requirements for identifying pipes, pipe fittings, traps, fixtures, materials, and devices used in plumbing systems.
CPC § 2025 Medium relevance — show source text
This material is not the complete and official position of the NFPA on the reference subject, which is represented solely by the relevant standard in its entirety. NFPA standards can be accessed at www.nfpa.org. In addition, this extracted material may include revisions or modifications developed through IAPMO’s standards development process. Therefore, NFPA disclaims responsibility for the content of this code.
Text that is extracted pursuant to IAPMO’s Extract Guidelines, but outside of the regular revision process is denoted with the use of the source document in the margin. This text is not fully processed by IAPMO in accordance with ANSI’s public announcement consensus requirements for an American National Standard (ANS) nor approved by ANSI’s Board of Standards Review. The next revision cycle processes such text in accordance with those requirements.
xii 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
FORMAT OF THE UNIFORM PLUMBING CODE
The format of the Uniform Plumbing Code (UPC) arranges each chapter in accordance with a specific subject matter. However, Chapter 3 is dedicated to general requirements that are applicable to every chapter. The subject matters are divided as follows:
CHAPTERS SUBJECTS 1 Administration 2 Definitions 3 General Regulations 4 Plumbing Fixtures and Fixture Fittings 5 Water Heaters 6 Water Supply and Distribution 7 Sanitary Drainage 8 Indirect Wastes 9 Vents 10 Traps and Interceptors 11 Storm Drainage 12 Fuel Gas Piping 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems 14 Firestop Protection 15 Alternate Water Sources for Nonpotable Applications 16 Nonpotable Rainwater Catchment Systems 17 Referenced Standards Appendix A Recommended Rules for Sizing the Water Supply System Appendix B Explanatory Notes on Combination Waste and Vent Systems Appendix C Alternate Plumbing Systems Appendix D Sizing Storm Water Drainage Systems Appendix E Manufactured/Mobile Home Parks and Recreational Vehicle Parks Appendix F Firefighter Breathing Air Replenishment Systems Appendix G Sizing of Venting Systems Appendix H Private Sewage Disposal Systems Appendix I Installation Standards Appendix J Combination of Indoor and Outdoor Combustion and Ventilation Opening Design Appendix K Potable Rainwater Catchment Systems Appendix L Sustainable Practices Appendix M Peak Water Demand Calculator Appendix N Impact of Water Temperature on the Potential for Scalding and Legionella Growth Appendix O Non-Sewered Sanitation Systems Appendix P Professional Qualifications Appendix Q Indoor Horticultural Facilities Appendix R Tiny Houses Appendix S Onsite Stormwater Treatment Systems 2025 CALIFORNIA PLUMBING CODE xiii
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
FORMAT OF THE UNIFORM PLUMBING CODE
The following is a summary of the scope and intent of the provisions addressed within the chapters and appendices of the Uniform Plumbing Code :
Chapter 1 Administration.
CPC § 2.25 Medium relevance — show source text
00|2.25|0.70|DR|3.70|1.05|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|33 mil cold-
formed steel
stud|#10 screw|Steel thick-
ness plus 3
threads|16|3.85|1.45|DR|DR|3.40|DR|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|33 mil cold-
formed steel
stud|#10 screw|Steel thick-
ness plus 3
threads|24|3.40|DR|DR|DR|2.70|DR|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#8 Screw|Steel thick-
ness plus 3
threads|12|3.00|1.80|DR|DR|3.00|0.65|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#8 Screw|Steel thick-
ness plus 3
threads|16|3.00|1.00|DR|DR|2.85|DR|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#8 Screw|Steel thick-
ness plus 3
threads|24|2.85|DR|DR|DR|2.20|DR|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#10 screw|Steel thick-
ness plus 3
threads|12|4.00|3.85|2.80|1.80|4.00|3.05|1.50|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#10 screw|Steel thick-
ness plus 3
threads|16|4.00|3.30|1.95|0.60|4.00|2.25|DR|DR| |Minimum 33
mil steel
furring or
minimum
1x wood
furringc|43 mil or
thicker cold-
formed steel
stud|#10 screw|Steel thick-
ness plus 3
threads|24|4.00|2.25|DR|DR|4.00|0.65|DR|DR| |For SI: 1 inch = 25.4 mm, 1 pound per square foot (psf) = 0.0479 kPa, 1 pound per square inch = 0.00689 MPa.
DR = Design Required, o.c. = on center.
a. Wood furring shall be spruce-pine-fir or any softwood species with a specific gravity of 0.42 or greater.CPC § 1.11.0. Medium relevance — show source text
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1-AC AC ** SS** SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter/Section This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
2025 CALIFORNIA PLUMBING CODE 535
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
536 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
APPENDIX P
PROFESSIONAL QUALIFICATIONS
The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency, or referenced in the adopting ordinance.
P 101.0 General.
P 101.1 Scope. The provisions of this appendix address minimum qualifications for installers, inspectors, or employers for systems covered within the scope of this code.
P 102.0 Qualifications.
P 102.1 General. Where permits are required, the Authority Having Jurisdiction shall have the authority to require contractors, installers, or service technicians to demonstrate competency. Where determined by the Authority Having Jurisdiction, the contractor or technicians shall be licensed or certified to perform such work. Professional qualifications shall be required for an individual to demonstrate the required level of competency.
P 102.2 Inspectors and Plans Examiners. Professional qualification for plumbing inspectors and plumbing plans examiners shall be qualified in accordance with ASSE/IAPMO/ANSI Series 16000.
P 102.2.1 Qualification for Plumbing Inspector. Professional qualification for plumbing inspectors shall be in accordance with ASSE/IAPMO/ANSI 16010.
P 102.2.2 Qualification for Plumbing Plan Exam- iner. Professional qualification for plumbing plans examiners shall be in accordance with ASSE/IAPMO/ANSI
CPC § 1505.12. Medium relevance — show source text
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 installed at an elevation above the treated nonpotable water piping.
Exception: [DWR] Recycled water supply systems that are within or a part of a building shall comply with Section 1505.12.
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.
2025 CALIFORNIA PLUMBING CODE 311
), 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 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 be completely drained and filled with earth, sand, gravel, concrete, or other approved material or removed in a manner satisfactory to the Authority Having Jurisdiction. 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- 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 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 field or disposal field, whichever is used. The means of changing the direction flow of the gray water shall be clearly labeled and readily accessible to the user.
(B) Water used to wash diapers or similarly soiled or infec- tious garments or other prohibited contents shall be diverted by the user to the building sewer.
(C) Gray water shall not be used in spray irrigation, allowed to pond or runoff and shall not be discharged directly into or reach any storm sewer system or any surface body of water.
(D) Human contact with gray water or the soil irrigated by gray water shall be minimized and avoided, except as required to maintain the gray water system. The dis- charge point of any gray water subsoil irrigation or sub- surface irrigation field shall be covered by at least two (2) inches (51 mm) of mulch, rock, or soil, or a solid shield to minimize the possibility of human contact.
CPC § 1.11. Medium relevance — show source text
The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
2025 CALIFORNIA EXISTING BUILDING CODE 3A-1
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
3A-2 2025 CALIFORNIA EXISTING BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
3 A PROVISIONS FOR ALL COMPLIANCE METHODS
User notes:
About this chapter: Chapter 3A controls the compliance options for alteration, repair, addition, evaluation and change of occupancy of existing structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development, which include hospitals and correctional treatment centers [applications listed in Section 1.10.1 (OSHPD 1)].
SECTION 301 A —ADMINISTRATION
301 A .1 Applicability. The provisions of this chapter shall control the alteration, repair, addition and change of occupancy of existing structures for applications listed in Sections 1.10.1 [OSHPD 1] regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development (OSHPD).
California Energy Commission, State Fire Marshal and DSA-AC requirements for existing structures shall be enforced by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development (OSHPD).
301 A .1.1 Bleachers, grandstands and folding and telescopic seating. Existing bleachers, grandstands and folding and telescopic seating shall comply with ICC 300.
301 A .2 Repairs. Repairs shall comply with the requirements of Chapter 4 A .
301 A .3 Alteration, addition or change of occupancy. The alteration, addition or change of occupancy of all existing buildings or structures shall comply with one of the methods or categories listed in Section 301 A .3.1, 301 A .3.2 or 301 A .3.3. Section 304A.3.2 applies to all methods or categories. Sections 301 A .3.1 through 301 A .3.3 shall not be applied in combination with each other , except when permitted by the enforcement agency.
Exception: Subject to the approval of the enforcement agency, alterations complying with the laws in existence at the time the building or the affected portion of the building was built shall be considered in compliance with the provisions of this code. New structural members added as part of the alteration shall comply with the California Building Code .
301 A .3.1 Prescriptive compliance method. Alterations, additions and changes of occupancy complying with Chapter 5 A of this code for existing buildings or structures shall be considered in compliance with the provisions of this code.
CPC § 18934.7. Medium relevance — show source text
1. BSC—California Building Standards Commission.
Application—Existing buildings as specified in Section A102 having at least one unreinforced masonry bearing wall, with the exception of buildings subject to building standards pursuant to Health and Safety Code, commencing with Section 17910.
Enforcing Agency—State or local agency specified by the applicable provisions of the law.
Authority Cited—Health and Safety Code Section 18934.7.
Reference— Health and Safety Code Sections 18901 through 18949. 2. HCD 1—The Department of Housing and Community Development.
Application—Hotels, motels, lodging houses, apartments, dwellings, employee housing and factory-built housing.
Enforcing Agency—The local building department or the Department of Housing and Community Development.
Authority Cited—Health and Safety Code Sections 17040, 17921, 17922 and 19990.
Reference—Health and Safety Code Sections 17000 through 17060, 17910 through 17990, 19960 through 19997; and Govern- ment Code Section 12955.1.
3. HCD 2—The Department of Housing and Community Development.
Application—Permanent buildings and permanent accessory buildings or structures constructed within mobilehome parks and special occupancy parks.
Enforcing Agency—The local building department or the Department of Housing and Community Development.
Authority Cited—Health and Safety Code Sections 18300, 18620, 18640, 18865, 18873 and 18873.2.
Reference—Health and Safety Code Sections 18200 through 18700 and 18860 through 18874.
SECTION A101—PURPOSE
[BS] A101.1 Purpose. The purpose of this chapter is to promote public safety and welfare by reducing the risk of death or injury from the effects of earthquakes on existing unreinforced masonry bearing wall buildings.
The provisions of this chapter are intended as minimum standards for structural seismic resistance, and are established primarily to reduce the risk of life loss or injury. Compliance with these provisions will not necessarily prevent loss of life or injury, or prevent earthquake damage to retrofitted buildings.
SECTION A102—SCOPE
[BS] A102.1 General. The provisions of this chapter shall apply to all existing buildings not more than six stories in height above the base of the structure and having not fewer than one unreinforced masonry bearing wall. The elements regulated by this chapter shall
2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX A-3
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
APPENDIX A—GUIDELINES FOR THE SEISMIC RETROFIT OF EXISTING BUILDINGS
be determined in accordance with Table A102.1. Except as provided herein, other structural provisions of the building code shall apply. This chapter does not apply to the alteration of existing electrical, plumbing, mechanical or fire safety systems.
CPC § 1-31 Medium relevance — show source text
114 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
115 Unsafe Structures and Equipment . . . . . . . . . . . . . . 1-31
116 Emergency Measures . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
117 Demolition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
202 General Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
CHAPTER 3 PROVISIONS FOR ALL COMPLIANCE
METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
301 Administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
302 General Provisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
303 Storm Shelters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
304 Structural Design Loads and Evaluation and Design Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
305 In-Situ Load Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
306 Accessibility for Existing Buildings . . . . . . . . . . . . . . . 3-6
307 Smoke Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
308 Carbon Monoxide Detection . . . . . . . . . . . . . . . . . . . . . 3-6
309 Additions and Replacements of Exterior Wall Coverings and Exterior Wall Envelopes . . . . . . . . . 3-7
310 [OSHPD 1R, 2 and 5] Services/Systems and Utilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
311 [OSHPD 1R, 2 and 5] Means of Egress . . . . . . . . . . . . . . . 3-7
CPC § 1-24 Medium relevance — show source text
102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Part 2—Administration and Enforcement . . . . . . . . . . . . . . . . . 1-24
103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-24
104 Duties and Powers of Building Official. . . . . . . . . . . 1-25
105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
106 Floor and Roof Design Loads . . . . . . . . . . . . . . . . . . . 1-29
107 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-29
108 Temporary Structures, Equipment and Systems . . . . . . . . . . . . . . . . . . . . . 1-31
109 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
110 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
111 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-33
112 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
113 Means of Appeals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
114 Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
115 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
202 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
CHAPTER 3 OCCUPANCY CLASSIFICATION AND USE . . . . .3-1
301 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
302 Occupancy Classification and Use Designation . . . . 3-3
CPC § 1.10.4.2 Medium relevance — show source text
1.10.4.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11.
Authority Cited – Health and Safety Code Sections 127010, 127015, and 129790.
References – Health and Safety Code Sections 127010, 127015, 1275, and 129675 through 130070. 1.10.4.3. Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Sub- section 1.10.4 will be identified in the Matrix Adoption Tables under the acronym OSHPD 4. 1.10.5 OSHPD 5. Specific scope of application of the agency responsible for enforcement, enforcement agency and the spe- cific authority to adopt and enforce such provisions of this code, unless otherwise stated.
OSHPD 5
Application – Acute psychiatric hospital buildings. Enforcing Agency – Health Care Access and Informa- tion/Office of Statewide Hospital Planning and Devel- opment (OSHPD). The office shall also enforce the Division of the State Architect – Access Compliance reg- ulations and the regulations of the Office of the State Fire Marshal for the above-stated facility types.
1.10.5.1 Applicable Administrative Standards. 1. Title 24, Part 1, California Code of Regulations: Chapter 7. 2. Title 24, Part 2, California Code of Regulations: Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter I, Division II.
1.10.5.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11.
Authority Cited – Health and Safety Code Sections 1275 and 129850.
References – Health and Safety Code Sections 129680, 1275 and 129675 through 130070. 1.10.5.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Sub- section 1.10.5 will be identified in the Matrix Adoption Tables under the Acronym OSHPD 5.
14 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 I CALIFORNIA ADMINISTRATION
1.10.6 OSHPD 6. Specific scope of application of the agency responsible for enforcement, enforcement agency and the spe- cific authority to adopt and enforce such provisions of this code, unless otherwise stated.
OSHPD 6
Application – Chemical dependency recovery hospital not within an acute care hospital building or an acute psychiatric facility.
Enforcing Agency – Local building department.
1.10.6.1 Applicable Administrative Standards.
Frequently asked questions
What kinds of rules live in Chapter 3?
Chapter 3 contains the cross-cutting installation and safety requirements that apply throughout the plumbing code — e.g., identification of piping and fittings, supported and sleeved penetrations, methods of approval for materials, and general installation safeguards. These are summarized in the CPC’s Chapter 3 descriptions and the chapter-format overview .
Where does Chapter 3 fit with the CPC’s overall scope?
Chapter 3 is part of the CPC’s substantive body and works with the code’s administrative and scope provisions (see §1.1.3 for the code’s scope and purpose). Use §1.1.3 to understand the code’s applicability, then use Chapter 3 for the minimum, system-wide installation rules that apply across later chapters .
If an alternate material or method is proposed, does Chapter 3 apply?
Yes — Chapter 3 contains the general approval and referenced-standard language used to evaluate alternate materials and methods; specific applications may also be governed by other chapters (for example, alternate water-source rules in Chapter 15 at §1502.5) .
More in California Plumbing Code
- Administration
- Definitions
- General Regulations
- Plumbing Fixtures and Fixture Fittings
- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage (Drain, Waste, and Vent)
- Indirect Wastes
- Vents
- Traps and Interceptors
- Storm Drainage
- Fuel Gas Piping
- Health Care Facilities — Medical Gas and Medical Vacuum Systems
- Alternate Water Sources and Nonpotable Rainwater Catchment Systems
Ask about the CPC
Get cited, plain-English answers on the California Plumbing Code for your project — any code section, any scenario.
Start Free Trial