CPC · California Plumbing Code

What permits and plans are required for installation?

Homeowners and contractors must obtain a separate plumbing permit before installing, altering, or replacing plumbing systems; when required by the local authority, submit complete construction documents drawn to scale (and prepared by a registered design professional when the AHJ requires). Recycled (reclaimed) water systems and on‑site treated graywater systems specifically require full plan submittal and AHJ approval before permits are issued. If you want, I can search again or retrieve the exact texts of **§ 1501.3**, **§ 1601.3**, and **§ 1602.2** — those exact CPC section texts were not available in the files returned to me.

Ask a question free See coverage

Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The California Plumbing Code (CPC) requires a separate plumbing permit for each building or structure before making any installation, alteration, replacement or repair of plumbing systems (see § 104.1). Where the Authority Having Jurisdiction (AHJ) requires it, construction documents / plans (prepared to scale and, where required, by a registered design professional) must be submitted with the permit application and approved before work proceeds (see § 104.3.1). Specific systems such as recycled water and on‑site treated nonpotable (gray) water systems have explicit plan-submission and permitting rules in Chapter 15 (see § 1505.2 and § 1506.2) that require complete plumbing plans acceptable to the AHJ.

The single most important rule: obtain a separate plumbing permit and submit complete construction documents when the AHJ requires them — do not start plumbing installations without these approvals.

Requirements in detail

Which installations always need a plumbing permit

  • New plumbing systems, alterations, replacements, major repairs, and installations of recycled or gray water systems require a plumbing permit. This is established by the CPC's permit requirement language in § 104.1.

When plans (construction documents) are required

  • The AHJ may require plans, specifications, drawings, engineering calculations, and other data before issuing a permit (see § 103.3 and § 104.3.1). Where the AHJ requires construction documents they must be submitted in two or more sets (or in an approved digital format), be drawn to scale, identify intended work, and be prepared by a registered design professional when the AHJ requires one.

Special systems with mandatory plan submittal

  • Recycled (reclaimed) water systems: No permit shall be issued until complete plumbing plans, with data satisfactory to the AHJ, have been submitted and approved (see § 1505.2 and § 1505.2.1) — the AHJ must also coordinate with State Water Boards/purveyors and public health as required.
  • On‑site treated nonpotable (gray) water systems: No permit shall be issued until complete plumbing plans, with data satisfactory to the AHJ, have been submitted and approved (see § 1506.2).

Inspections and tests to expect

  • Permitted plumbing work is subject to required inspections: underground, rough‑in, and final inspections (minimum) before the system may be covered or placed into service (see § 105.2). Work covered without inspection must be uncovered for inspection at the AHJ's direction.

Table — Decision‑relevant dimensions and required submittals

Work / System Permit required? Plans required? Who may need to design or stamp plans Code reference
New plumbing system (general) Yes AHJ may require plans Registered design professional if AHJ requires § 104.1; § 104.3.1
Repairs that only stop leaks (no replacement) No (exempt) Not required N/A § 104.2(1)
Clearing stoppages; minor repairs No (exempt if they do not rearrange piping) Not required N/A § 104.2(2)
Recycled (reclaimed) water supply systems Yes Complete plumbing plans required before permit AHJ may require registered design professional; AHJ coordinates with SWRCB/local purveyor § 1505.2; § 1505.2.1
On-site treated nonpotable (gray) water systems Yes Complete plumbing plans required before permit AHJ may require registered design professional; consult public health § 1506.2
Work started without permit Permit required + investigation fee; special investigation AHJ will require after‑the‑fact plans N/A § 104.5; § 104.5.2

(“AHJ” = Authority Having Jurisdiction)

Exceptions & special cases

  • Small/ordinary repairs: Stopping a leak or clearing a stoppage where no replacement or rearrangement is performed is exempt from a permit (see § 104.2(1)–(2)). But if you remove/replace pipe or fixtures the exemption no longer applies.
  • AHJ waiver: The AHJ may waive construction document submissions when the nature of the work is such that review is unnecessary (exception in § 104.3.1). However, this is discretionary—do not assume a waiver.
  • Recycled/gray water: Even small recycled/gray water systems require complete plans acceptable to the AHJ before a permit can be issued; local consultation with water purveyors and public health is often required (see § 1505.2 and § 1506.2).

Note: I searched the supplied CPC documents for the controlling sections you listed — § 1501.3, § 1601.3, and § 1602.2 — but the explicit CPC text for those exact section numbers was not present in the files returned by the search. Therefore I have not asserted requirements attributed to those specific sections because their wording was not retrieved. If you want, I can search again or you can upload the specific pages containing those sections so I can include direct, section‑level citations.

Common mistakes

  • Starting work without a permit — contractors or owners then face an investigation fee equal to the permit fee and possible penalties (see § 104.5.2).
  • Assuming all “small” plumbing changes are exempt — replacement or rearrangement of pipe and fixtures generally requires a permit (see § 104.2).
  • Submitting incomplete plans — jurisdictions will charge additional plan‑review fees and delay permits if plans lack required details, calculations, or professional stamps when required (see § 104.3.2).
  • Treating recycled/gray water work like ordinary domestic plumbing — these systems require full plan review and AHJ coordination with public health and water purveyors (see § 1505.2, § 1506.2).

Worked example — single‑family property, new graywater irrigation system

Scenario: A homeowner wants to install an on‑site treated graywater system that collects laundry and condensate water, treats it in a small treatment train, and distributes to subsurface irrigation for landscaping.

  1. Permit: A plumbing permit is required for this installation (CPC permit rules). Do not begin work before getting the permit.
  2. Plans: The AHJ will require complete plumbing plans for a graywater system — submit plans showing: site plan (connection points, tank location), piping diagrams, backflow/cross‑connection protection, treatment components, pump curves, expected flows (gpm), and labeling. CPC mandates that no permit shall be issued until complete plumbing plans acceptable to the AHJ have been submitted and approved for graywater systems (see § 1506.2).
  3. Designer: If the AHJ requires a registered design professional, the plans must be prepared and stamped accordingly (see § 104.3.1).
  4. Inspections: Expect underground (if trenches are dug), rough‑in (before covering piping), and final inspections; do not conceal piping before inspection (see § 105.2).

Numbers example: system delivers 10 gpm peak to irrigation. Plans must show pump curve and that the installed pump provides at least 15 psi residual at the highest remote outlet if system supplies toilets/urinals (if it did) — note that CPC §1506.5 sets a 15 psi residual requirement specifically where graywater supplies fixtures; if your system is irrigation‑only, the AHJ will still want flow/pressure data on the plans.

Related provisions

  • § 104.1 — Permits required (plumbing)
  • § 104.2 — Exempt work (stopping leaks, clearing stoppages)
  • § 104.3.1 — Construction documents / plans submission requirements
  • § 104.3.2 — Plan review fees (when plans are required)
  • § 104.5.2 — Investigation fees for work started without permit
  • § 105.2 — Required inspections: underground, rough‑in, final
  • § 1505.2 / § 1505.2.1 — Recycled (reclaimed) water permit and plan submittal requirements
  • § 1506.2 / § 1506.3 — On‑site treated nonpotable (gray) water plumbing plan submission and system‑change controls

Code references

Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:

  • CPC § 103.3 High relevance — show source text

    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 violation of this code or of other pertinent ordinance or from revoking a certificate of approval where issued in error.

    103.3.1 Licensing. Provision for licensing shall be determined by the Authority Having Jurisdiction. 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 occupied, the Authority Having Jurisdiction shall present credentials to the occupant and request entry. Where such building or premises is unoccupied, the Authority Having Jurisdiction shall first make a reasonable effort to locate the owner or other person having charge or control of the building or premises and request entry. Where entry is refused, the Authority Having Jurisdiction has recourse to every remedy provided by law to secure entry.

    Where the Authority Having Jurisdiction shall have first obtained an inspection warrant or other remedy provided by law to secure entry, no owner, occupant, or person having charge, care or control of a building or premises shall fail or neglect, after a request is made as herein provided, to promptly permit entry herein by the Authority Having Jurisdiction for the purpose of inspection and examination pursuant to this code.

    104.0 Permits.

    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 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 require the replacement or rearrangement of valves, pipes, or fixtures.

    Exemption from the permit requirements of this code shall not be deemed to grant authorization for work to be done in violation of the provisions of the code or other laws or ordinances of this jurisdiction. 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:

  • CPC § 14877.3. High relevance — show source text

    ** 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 in issuing permits. See California Water Code Section 14877.3.

    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 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 1502.3.2. 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 months thereafter.

    Inspect valves and verify operation. After initial installation and every 12 months thereafter.

    Inspect pressure tanks and verify operation. After initial installation and every 12 months thereafter.

    Clear debris from and inspect storage tanks, locking devices, and verify operation.

    After initial installation and every 12 months thereafter.

    Inspect caution labels and marking. After initial installation and every 12 months thereafter.

    * Note: Frequency is as described in this table, or more frequently as required by manufacturer’s instructions and/or the Authority Having Jurisdiction.

    322 2025 CALIFORNIA PLUMBING CODE

    ), 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

  • CPC § 1505.1.1 High relevance — show source text

    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 potable water purveyor in accordance with their respective statutory authority and responsibility as provided on their respective permits for sup- plying water. Plumbing systems using reclaimed (recycled) water that do not enter the interior of a building plumbed with potable water are not encompassed by this section. All reclaimed (recycled) water use, covered and not covered by this code, is subject to applicable provisions of the State Water Resources Control Board’s Cross-Connection Control Policy Handbook and the California Code of Regulations: Title 22 and Title 23 .

    1505.1.1 Allowed Uses. Allowed uses shall include water closets, urinals, trap primers for floor drains and floor sinks, aboveground and subsurface irrigation, industrial or commercial cooling or air conditioning and other uses as generally allowed in the California Code of Regulations, Title 22, Division 4, Chapter 3 and specifi- cally allowed in the permit for the facility producing or supplying the reclaimed (recycled) water issued by the State Water Resources Control Board or Regional Water Quality Control Board .

    1505.1.2 Structures Allowed for Toilet and Urinal Flushing. In accordance with Water Code Section 13553, reclaimed (recycled) water shall be allowed for toilet and urinal flushing in certain structures. These structures include commercial, retail, and office buildings, theaters, auditoriums, condominium projects, schools, hotels, apart-

    318 2025 CALIFORNIA PLUMBING CODE

    ), 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

    ments, barracks, dormitories, jails, prisons, reformatories, and other structures as determined by the State Water Resources Control Board.

    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 recycled water purveyor to ensure that state and local public health concerns are addressed in local stan- dards or ordinances, or in issuing permits.

    1505.2.1 Plumbing Plan Submission. No permit for a recycled water supply system shall be issued until complete plumbing plans, with data satisfactory to the Authority Having Jurisdiction, have been submitted and approved.

  • CPC § 1.8.3.2.5 High relevance — show source text

    Title 25, Division 1, Chapter 1, Subchapter 3, com- mencing with Section 600 for employee housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties.

    1.8.3.2.5 Factory-Built Housing Law. Refer to the Factory-Built Housing Law, California Health and Safety Code, Division 13, Part 6 commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, com- mencing with Section 3000 for factory-built housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties.

    1.8.4 Permits, Fees, Applications, and Inspections.

    1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, reconstruction, installation, relocation, or alteration of any plumbing system.

    Exceptions:

    1. Work exempt from permits as specified in Chapter 1, Administration, Division II, Section 104.2 items (1)-(2) of this code.

    2. Changes, alterations, or repairs of a minor nature not affecting structural features, egress, sanitation, safety, or accessibility as determined by the enforc- ing agency.

    3. Retroactive permits issued in accordance with Health and Safety Code Section 17958.12.

    Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code.

    1.8.4.2 Fees. Subject to other provisions of law, the gov- erning body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Hous- ing and Community Development. The amount of the fees shall not exceed the amount reasonably necessary to administer or process permits, certificates, forms, or other documents, or to defray the costs of enforcement. For additional information, see State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, Article 3, com- mencing with Section 6.

    1.8.4.3 Plan Review and Time Limitations. Subject to other provisions of law, provisions related to plan check- ing, prohibition of excessive delays, and contracting with or employment of private parties to perform plan check- ing are set forth in the State Housing Law, Health and Safety Code Section 17960.1, and for employee housing, in Health and Safety Code Section 17021.

    1.8.4.3.1 Retention of Plans. The building depart- ment of every city, county, or city and county shall maintain an official copy, microfilm, or electronic or other type of photographic copy of the plans of every building, during the life of the building, for which the department issued a building permit.

    2025 CALIFORNIA PLUMBING CODE 9

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

  • CPC § 26-2019 Medium relevance — show source text

    APPENDIX I

    INSTALLATION STANDARDS

    CONTENTS

    Page

    IAPMO IS 26-2019 [e4]

    Trenchless Insertion of Polyethylene (PE) Pipe for Sewer Laterals................................................................451

    IAPMO IS 31-2022

    Installation Standard for PEX Tubing Systems for Hot- and Cold Water Distribution......................................455

    IAPMO IS 33-2019 [e2]

    Thrust Blocking for Rubber Gasketed and Solvent Cement Joints ................................................................463

    TCNA Handbook-2022

    For Ceramic, Glass, and Stone Tile Installation .............................................................................................471

    2025 CALIFORNIA PLUMBING CODE 449

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    450 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    "The information contained in this appendix is not part of this American National Standard (ANS) and has not been processed in accordance with ANSI's requirements for an ANS. As such, this appendix may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the standard."

    The following IAPMO Installation Standard is included here for the convenience of the users of the Uniform Plumbing Code. It is not considered as a part of the Uniform Plumbing Code unless formally adopted as such. This Installation Standard is an independent, stand-alone document published by the International Association of Plumbing and Mechanical Officials and is printed herein by the expressed written permission of IAPMO.

    TRENCHLESS INSERTION OF

    POLYETHYLENE (PE) PIPE FOR SEWER LATERALS

    IAPMO IS 26-2019 [e4]

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency, or referenced in the adopting ordinance.

    1 Scope

    1.1 General

    This standard shall govern the trenchless installation of polyethylene (PE) pipe for use in sanitary and storm sewers. The installed pipe shall comply with the requirements of the Uniform Plumbing Code (UPC [TM] ) published by the International Association of Plumbing and Mechanical Officials (IAPMO) as to grade and connections to existing pipe and shall also comply with this standard. This standard specifies requirements for the installation of the trenchless insertion of polyethylene (PE) pipe for use in sanitary and storm sewers. 1.2 Terminology

    In this Standard,

    (a) “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard;

    (b) “should” is used to express a recommendation, but not a requirement;

    (c) “may” is used to express an option or something permissible within the scope of the Standard; and

    (d) “can” is used to express a possibility or a capability.

    Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informative material from the text. Notes to tables and figures are considered part of the table or figure and can be written as requirements.

    2 Reference Publications

    This Standard refers to the following publications, and where such reference is made, it shall be to the current edition of those publications, including all amendments published thereto.

  • CPC § 1323.13.3 Medium relevance — show source text

    2, 1323.13.3| |1326.4 - 1326.10|1326.5 - 1326.11| |1505.6 - 1505.14|1505.5 - 1505.13| |Figure 1505.10|Figure 1505.9| |1506.6 - 1506.13|1506.5 - 1506.12| |1603.3 - 1603.4|1603.4 - 1603.5| |Table 1603.4|Table 1603.5| |1603.5 - 1603.19|1603.6 - 1603.20| |1603.20|1503.2.4| |L 402.9 - L 402.11|L 402.8 - L 402.10| |L 404.9 - L 404.12|L 404.8 - L 404.11| |L 411.5, L 411.6|L 411.2, L411.3| |L 411.7|L 411.4| |L 411.9 - L 411.12|L 411.5 - L 411.8|

    xxii 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    RELATED PUBLICATIONS AND SERVICES

    The Documents Listed are Not by this Reference Adopted by The State of California.

    IAPMO provides a variety of other products which are useful for inspectors, building officials, architects, engineers,

    manufacturers, contractors, plumbers, and apprentices.

    IAPMO Headquarters Directory

    4755 East Philadelphia Street, Ontario, California 91761-2816

    Publication Order Desk Phone: 800-85-IAPMO

    Publication Toll Free Fax: 877-85-CODES

    E-mail: iapmo@iapmo.org

    Website: www.iapmo.org

    Free Code Question: 800-201-0335

    Uniform Plumbing Code – 2024 Edition:

    The Uniform Plumbing Code is the most widely adopted plumbing code in the world. The 2024 edition contains complete “turnkey” requirements for the installation and maintenance of plumbing systems, all in one easy to use book.

    Uniform Plumbing Code Illustrated Training Manual:

    The UPC Illustrated Training Manual is an excellent reference for anyone involved in the plumbing industry. It contains an extensive definitions section and several hundred comprehensive technical diagrams and illustrations. It serves as a textbook, and it also is useful as a valuable tool for explaining the intent and use of the Code.

    Uniform Plumbing Code Study Guide:

    This book is the perfect complement to the UPC Illustrated Training Manual. Alone, it constitutes a complete self-study course for learning the UPC. It has hundreds of questions, general practice exams, and plumbing math, pipe sizing exercises and fitting identification. A big help in getting you ready for a certification exam!

    Guide to Important Code Questions to the Uniform Plumbing Code:

    An excellent reference for learning and understanding plumbing code changes and identifies code changes between editions. It is a useful tool for preparing code change proposals.

    Uniform Mechanical Code – 2024 Edition:

    The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

    Uniform Mechanical Code Illustrated Training Manual:

    Contains technical diagrams and illustrations that demonstrate the intent and use of the UMC. A great reference for everyone involved in Mechanical HVACR design and installation.

    Uniform Mechanical Code Study Guide:

  • CPC § 101.2.2 Medium relevance — show source text

    CFC—25: California Fire Code

    101.2.2, 101.4.2, 301.3.1, 302.2, 307.1, 308.1, 802.2.1, 802.2.3, 803.2.3, 803.4.1.1, 803.4.1.2, 803.4.1.3, 803.4.1.4, 803.4.1.5, 803.4.1.6, Table 804.5.1.1(1), 904.1.5, 1011.6.1.1, 1303.1.2, 1305.2.8.1, 1305.2.14, 1305.2.14.1, 1401.2, 1501.1, 1501.5, 1502.1, 1502.1.1, 1502.2, 1502.3, 1504.1, 1507.1, 1507.2

    CMC—25: California Mechanical Code

    302.2, 702.7, 807.1, 902.1.1, 1008.1, 1305.2.7.1, 1305.2.8, 1305.2.8.1

    CPC—25: California Plumbing Code

    302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1

    16-4 2025 CALIFORNIA EXISTING BUILDING CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    REFERENCED STANDARDS

    CRC—25: California Residential Code

    101.2, 101.4.1, 104.3.1, 109.3.3, 109.3.10, 302.2, 307.1, 308.1, 401.3, 402.1, 405.2.6, 502.2, 502.3, 502.4, 503.2, 503.3, 503.11, 505.2, 505.3, 507.3, 701.3, 702.4, 702.5, 706.2, 708.1, 805.2, 806.4, 809.1, 906.2, 907.1, 1011.2.1, 1103.1, 1103.2, 1103.3, 1104.1, 1201.4, 1302.1.2, 1302.1.3, 1302.1.3, 1303.1.3, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6

    ICC 300—2023: ICC Standard on Bleachers, Folding and Telescopic Seating and Grandstands

    301.1.1, 401.1.1, 1401.1.1

    ICC A117.1—2017: Accessible and Usable Buildings and Facilities

  • CPC § 309.0 Medium relevance — show source text

    2025 CALIFORNIA PLUMBING CODE 469

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    IS 33

    Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

    The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

    Chapter 3 General Regulations

    309.0 Workmanship

    312.0 Protection of Piping, Materials, and Struc tures

    313.0 Hangers, Supports, and Anchors

    314.0 Trenching, Excavation, and Backfill

    Chapter 6 Water Supply and Distribution

    604.0 Materials (water piping)

    Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

    605.4 Ductile Iron Pipe and Joints

    605.12 PVC Plastic Pipe and Joints

    605.16.2 Plastic Pipe to Other Materials

    609.0 Installation, Testing, Unions, and Location

    Abbreviations

    IAPMO International Association of Plumbing and Mechanical Officials

    UPC Uniform Plumbing Code published by IAPMO

    AWWA American Water Works Association

    CSA Canadian Standards Association

    Applicable Standards.

    ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

    ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

    ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

    ASTM D2466 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

    ASTM D2467 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

    ASTM F1970 Special Engineered Fittings, Appurtenances or Valves for use in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems

    AWWA C110 Ductile Iron and Gray-Iron Fittings

    AWWA C111 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings

    AWWA C151 Ductile-Iron Pipe, Centrifugally Cast

    AWWA C153 Ductile-Iron Compact Fitting

    AWWA C900 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 in. through 12 in. (100 mm through 300 mm)

    AWWA C904 Crosslinked Polyethylene (PEX) Pressure Tubing, ½ in. through 3 In. (13 mm through 76 mm), for Water Service

    AWWA C907 Injection-Molded Polyvinyl Chloride (PVC) Pressure Fittings, 4 In, through 12 in (100 mm through 300 mm) for Water, Wastewater and Reclaimed Water Service

    IAPMO/

    ANSI UPC-1 Uniform Plumbing Code

    470 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

  • CPC § 11.0 Medium relevance — show source text

    11.0 - 1.11.11_|||X|||||||||||||||||||||| |1.13.0||||||||||||||||||||X||||| |Division II - Scope and
    Administration||||||||||||||||||||||||| |101.0||||||||||X|X|X||X|X|||||||||| |102.0||||||||||X|X|X||X|X|||||||||| |103.0||||||||||X|X|X||X|X|||||||||| |104.2 Items 1 & 2||||X|X|||||||||||||||||||| |104.3.1||||||||||X|X|X||X|X|||||||||| |104.4.3.1|X|||||||||||||||||||||||| |105.0||||||||||X|X|X||X|X||||||||||

    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.

    2 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CHAPTER 1

    ADMINISTRATION

    DIVISION I

    CALIFORNIA ADMINISTRATION

    1.1.0 General.

    1.1.1 Title. These regulations shall be known as the Califor- nia Plumbing Code, may be cited as such and will be referred to herein as “this code.” The California Plumbing Code is Part 5 of thirteen parts of the official compilation and publi- cation of the adoption, amendment, and repeal of plumbing regulations to the California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part incorporates by adoption the 2024 Uniform Plumb- ing Code of the International Association of Plumbing and Mechanical Officials with necessary California amendments.

    1.1.2 Purpose. The purpose of this code is to establish the minimum requirements to safeguard the public health, safety and general welfare through structural strength, means of egress facilities, stability, access to persons with disabilities, sanitation, adequate lighting and ventilation, and energy con- servation; safety to life and property from fire and other haz- ards attributed to the built environment; and to provide safety to fire fighters and emergency responders during emergency operations.

    1.1.3 Scope. The provisions of this code shall apply to the construction, alteration, movement, enlargement, replace- ment, repair, equipment, use and occupancy, location, main- tenance, removal, and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures throughout the State of California.

  • CPC § 705.10 Medium relevance — show source text

    Waste,
    and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Sys-
    tems for Above and Below Ground Use|Joints|705.10|

    340 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    REFERENCED STANDARDS

    TABLE 1701.1 (continued) REFERENCED STANDARDS

    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    ASTM C1540-2020 Standard Specification for Heavy-Duty Shielded Couplings
    Joining Hubless Cast Iron Soil Pipe and Fittings    		 Joints 705.2.2
    ASTM C1563-2008
    (R2021)    		 Standard Test Method for Gaskets for Use in Connection with
    Hub and Spigot Cast Iron Soil Pipe and Fittings for Sanitary
    Drain, Waste, Vent, and Storm Piping Applications    		 Joints 705.2.2
    ASTM C1822-2021 Standard Specification for Insulating Covers on Accessible
    Lavatory Piping    		 Miscellaneous 403.3
    ASTM D1253-2014 Standard Test Method for Residual Chlorine in Water Miscellaneous 1506.10.6, 1603.4.1
    ASTM D1785-2021a Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic
    Pipe, Schedules 40, 80, and 120    		 Piping Table 604.1, Table
    701.2
    ASTM D2235-2021 Standard Specification for Solvent Cement for Acrylonitrile-
    Butadiene-Styrene (ABS) Plastic Pipe and Fittings    		 Joints 705.1.2
    ASTM D2239-2021 Standard Specification for Polyethylene (PE) Plastic Pipe
    (SIDR-PR) Based on Controlled Inside Diameter    		 Piping Table 604.1
    ASTM D2241-2020 Standard Specification for Poly (Vinyl Chloride) (PVC) Pressure-
    Rated Pipe (SDR Series)    		 Piping Table 604.1
    ASTM D2464-2015 Standard Specification for Threaded Poly (Vinyl Chloride)
    (PVC) Plastic Pipe Fittings, Schedule 80    		 Fittings Table 604.1
    ASTM D2466-2021 Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic
    Pipe Fittings, Schedule 40    		 Fittings Table 604.1
    ASTM D2467-2020 Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic
    Pipe Fittings, Schedule 80    		 Fittings Table 604.1
    ASTM D2513-2020 Standard Specification for Polyethylene (PE) Gas Pressure
    Pipe, Tubing, and Fittings    		 Piping 1208.5.4, 1208.5.6.2,
    1208.5.10.2,
    1210.1.7.1(1)
    ASTM D2564-2020 Standard Specification for Solvent Cements for Poly (Vinyl
    Chloride) (PVC) Plastic Piping Systems    		 Joints 605.12.2, 705.6.
  • CPC § 4.1 Medium relevance — show source text
    • 100°F
      (16°C-38°C)|1 h|6 h|2 h|12 h|6 h|24 h| |40°F-60°F
      (4°C-16°C)|2 h|12 h|4 h|24 h|12 h|48 h| |10°F- 40°F
      (-12°C+4°C)|8 h|48 h|16 h|96 h|48 h|8 days| |*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|

    2025 CALIFORNIA PLUMBING CODE 467

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    IS 33

    FIGURE 1

    LOCATION OF THRUST BLOCKS (STANDARD AND METRIC COMBINED) A COMPARISON OF THRUST-BLOCK AREAS (See Section 4.1)

    468 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 33

    FIGURE 2

    THRUST BLOCK BEARING AREA (See Section 5.2.2)

    2025 CALIFORNIA PLUMBING CODE 469

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    IS 33

    Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

    The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

    Chapter 3 General Regulations

    309.0 Workmanship

    312.0 Protection of Piping, Materials, and Struc tures

    313.0 Hangers, Supports, and Anchors

    314.0 Trenching, Excavation, and Backfill

    Chapter 6 Water Supply and Distribution

    604.0 Materials (water piping)

    Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

    605.4 Ductile Iron Pipe and Joints

    605.12 PVC Plastic Pipe and Joints

    605.16.2 Plastic Pipe to Other Materials

    609.0 Installation, Testing, Unions, and Location

    Abbreviations

    IAPMO International Association of Plumbing and Mechanical Officials

    UPC Uniform Plumbing Code published by IAPMO

    AWWA American Water Works Association

    CSA Canadian Standards Association

    Applicable Standards.

    ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

    ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

    ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

  • CPC § 3.3 Medium relevance — show source text

    3.3||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1601.2
    1601.3 & Exceptions 1 & 2
    1601.5
    1601.6
    1601.7
    1602.4_& Exceptions_
    1602.7
    1603.3
    1603.3.1 &Exception
    1603.4
    1603.4.1
    Table 1603.4
    1603.7
    1603.8
    1603.9
    1603.10_A & B_
    1603.12
    1603.20
    1604.1 - 1604.3
    1605.3
    1605.3.2
    1605.3.3||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1601.2
    1601.3 & Exceptions 1 & 2
    1601.5
    1601.6
    1601.7
    1602.4_& Exceptions_
    1602.7
    1603.3
    1603.3.1 &Exception
    1603.4
    1603.4.1
    Table 1603.4
    1603.7
    1603.8
    1603.9
    1603.10_A & B_
    1603.12
    1603.20
    1604.1 - 1604.3
    1605.3
    1605.3.2
    1605.3.3|X|||X||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1601.2
    1601.3 & Exceptions 1 & 2
    1601.5
    1601.6
    1601.7
    1602.4_& Exceptions_
    1602.7
    1603.3
    1603.3.1 &Exception
    1603.4
    1603.4.1
    Table 1603.4
    1603.7
    1603.8
    1603.9
    1603.10_A & B_
    1603.12
    1603.20
    1604.1 - 1604.3
    1605.3
    1605.3.2
    1605.3.3|X|||X|X|||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1601.2
    1601.3 & Exceptions 1 & 2
    1601.5
    1601.6
    1601.7
    1602.4_& Exceptions_
    1602.

  • CPC § 1.8.4 High relevance — show source text

    SECTION 1.8.4—PERMITS, FEES, APPLICATIONS AND INSPECTIONS

    1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, reconstruction, installation, moving or alteration of any building or structure.

    Exceptions:

    1. Work exempt from permits as specified in Chapter 1, Division II, Scope and Administration, Section 105.2. 2. Changes, alterations or repairs of a minor nature not affecting structural features, egress, sanitation, safety or accessibility as determined by the enforcing agency. 3. Retroactive permits issued in accordance with Health and Safety Code Section 17958.12.

    Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code.

    1.8.4.2 Fees. Subject to other provisions of law, the governing body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Housing and Community Development. The amount of the fees shall not exceed the amount reasonably necessary to administer or process permits, certificates, forms or other documents, or to defray the costs of enforcement. For additional information, see the State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, Article 3, commencing with Section 6.

    1.8.4.3 Plan review and time limitations. Subject to other provisions of law, provisions related to plan checking, prohibition of excessive delays and contracting with or employment of private parties to perform plan checking are set forth in the State Housing Law, Health and Safety Code Section 17960.1, and for employee housing, in Health and Safety Code Section 17021.

    1.8.4.3.1 Retention of plans. The building department of every city, county, or city and county shall maintain an official copy, microfilm, electronic or other type of photographic copy of the plans of every building, during the life of the building, for which the department issued a building permit.

    Exceptions:

    1. Single or multiple dwellings not more than two stories and basement in height. 2. Garages and other structures appurtenant to buildings listed in Exception 1. 3. Farm or ranch buildings appurtenant to buildings listed in Exception 1. 4. Any one-story building where the span between bearing walls does not exceed 25 feet (7620 mm), except a steel frame or concrete building.

    All plans for common interest developments as defined in Section 4100 of the California Civil Code shall be retained. For additional information regarding plan retention and reproduction of plans by an enforcing agency, see Health and Safety Code Sections 19850 through 19852.

  • CPC § 104.3.2 High relevance — show source text

    104.3.2 Plan Review Fees. Where a plan or other data is required to be submitted in accordance with Section 104.3.1, a plan review fee shall be paid at the time of submitting construction documents for review.

    The plan review fees for plumbing work shall be determined and adopted by this jurisdiction.

    The plan review fees specified in this subsection are separate fees from the permit fees specified in Section 104.5.

    Where plans are incomplete or changed so as to require additional review, a fee shall be charged at the rate shown in Table 104.5.

    104.3.3 Time Limitation of Application. Applications for which no permit is issued within 180 days following the date of application shall expire by limitation, plans and other data submitted for review thereafter, shall be returned to the applicant or destroyed by the Authority Having Jurisdiction. The Authority Having Jurisdiction shall be permitted to exceed the time for action by the applicant for a period not to exceed 180 days upon request by the applicant showing that circumstances beyond the control of the applicant have prevented the action from being taken. No application shall be extended more than once. In order to renew action on an application after expiration, the applicant shall resubmit plans and pay a new plan review fee. 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 specified in Section 104.5 have been paid, the Authority Having Jurisdiction shall issue a permit therefore to the applicant. 104.4.1 Approved Plans or Construction Docu- ments. Where the Authority Having Jurisdiction issues the permit where plans are required, the Authority Having Jurisdiction shall endorse in writing or stamp the construction documents “APPROVED.” Such approved construction documents shall not be changed, modified, or altered without authorization from the Authority Having Jurisdiction, and the work shall be done in accordance with approved plans.

    The Authority Having Jurisdiction shall be permitted to issue a permit for the construction of a part of a plumbing system before the entire construction documents for the whole system have been submitted or approved, provided adequate information and detailed statements have been filed in accordance with the pertinent requirements of this code. The holder of such permit shall be permitted to proceed at the holder’s risk without assurance that the permit for the entire building, structure, or plumbing system will be granted. 104.4.2 Validity of Permit. The issuance of a permit or approval of construction documents shall not be construed to be a permit for, or an approval of, a violation of the provisions of this code or other ordinance of the jurisdiction. No permit presuming to give authority to violate or cancel the provisions of this code shall be valid.

    The issuance of a permit based upon plans, specifications, or other data shall not prevent the Authority Having Jurisdiction from thereafter requiring the correction of errors in said plans, specifications, and other data or from preventing building operations being carried on thereunder where in violation of this code or of other ordinances of this jurisdiction. **104.4.3 Expiration.

  • CPC § 104.5.2 High relevance — show source text

    ** 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 investigation fee shall be equal to the amount of the permit fee that is required by this code if a permit were to be issued. The payment of such investigation fee shall not exempt a person from compliance with other provisions of this code, nor from a penalty prescribed by law. 104.5.3 Fee Refunds. The Authority Having Jurisdiction shall be permitted to authorize the refunding of a fee as follows:

    (1) The amount paid hereunder that was erroneously paid or collected.

    (2) Refunding of not more than a percentage, as determined by this jurisdiction where no work has been done under a permit issued in accordance with this code.

    The Authority Having Jurisdiction shall not authorize the refunding of a fee paid except upon written application filed by the original permittee not to exceed 180 days after the date of fee payment.

    105.0 Inspections and Testing.

    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 Authority Having Jurisdiction.

    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 underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place.

    (2) Rough-in inspection shall be made prior to the installation of wall or ceiling membranes.

    (3) Final inspection shall be made upon completion of the installation.

    105.2.1 Uncovering. Where a drainage or plumbing system, building sewer, private sewage disposal system, or part thereof, which is installed, altered, or repaired, is covered or concealed before being inspected, tested, and approved as prescribed in this code, it shall be uncovered for inspection after notice to uncover the work has been issued to the responsible person by the Authority Having Jurisdiction.

    The requirements of this section shall not be considered to prohibit the operation of plumbing installed to replace existing equipment or fixtures serving an occupied portion of the building in the event a request for inspection of such equipment or fixture has been filed with the Authority Having Jurisdiction not more than 72 hours after such replacement work is completed, and before a portion of such plumbing system is concealed by a permanent portion of the building.

    105.2.1.1 Water Supply System. No water supply system or portion thereof shall be covered or concealed until it first has been tested, inspected, and approved.

  • CPC § 1401.0 High relevance — show source text

    334 2025 CALIFORNIA MECHANICAL CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CHAPTER 14

    PROCESS PIPING

    1401.0 General.

    1401.1 Applicability. Except as otherwise addressed in this code, this chapter shall govern the installation of process piping in or in conjunction with a building or structure located upon the premises.

    1402.0 Permit.

    1402.1 General. It shall be unlawful to install, alter, or repair or cause to be installed, altered, or repaired process material piping without first obtaining a permit.

    Permits for process piping shall show the total number of outlets to be provided for on each system and such other information as required by the Authority Having Jurisdiction.

    Fees for process piping permits are included in Table 104.5.

    1403.0 Plans Required.

    1403.1 General. Plans, engineering calculations, diagrams, and other data shall be submitted in one or more sets with each application for a permit. The Authority Having Jurisdiction shall be permitted to require plans, computations, and specifications to be prepared and designed by a registered design professional.

    Where plans or other data are submitted for review, a plan review fee shall be paid, as provided in Section 104.3.2.

    1404.0 Workmanship.

    1404.1 General. Process piping shall not be strained or bent, nor shall tanks, vessels, vats, appliances, or cabinets be supported by or develop strain or stress on the piping.

    1405.0 Inspections.

    1405.1 General. Upon completion of the installation, alteration, or repair of process piping, and prior to the use thereof, the Authority Having Jurisdiction shall be notified that such piping is ready for inspection.

    Excavations required for the installation of underground piping shall be kept open until such time as 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.

    1405.2 Required Inspections. The Authority Having Jurisdiction shall make the following inspections and shall either 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.

    1405.2.1 Rough Piping Inspection. This inspection shall be made after process piping authorized by the permit has been installed and before piping has been cov

    ered or concealed. This inspection shall include a determination that the piping size, material, and installation are in accordance with the requirements of this code.

    1405.2.2 Final Piping Inspection. This inspection shall be made after piping authorized by the permit has been installed and after portions thereof that are to be covered or concealed are so concealed. This inspection shall include a pressure test, at which time the piping shall stand a pressure of not less than one-and-one-half times the maximum designed operating pressure where hydraulic testing is conducted or 110 percent where testing is conducted pneumatically. Test pressures shall be held for a length of time satisfactory to the Authority Having Jurisdiction, but in no case for less than 30 minutes with no perceptible drop in pressure. HPM drain, waste, and vent piping shall be tested in accordance with the plumbing code. Tests shall be made in the presence of the Authority Having Jurisdiction. Necessary apparatus for conducting tests shall be furnished by the permit holder.

  • CPC § 104.3.1. High relevance — show source text

    (3) Indicate the use or occupancy for which the proposed work is intended.

    22 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

    (4) Be accompanied by construction documents in accordance with Section 104.3.1.

    (5) Be signed by the permittee or the permittee’s authorized agent. The Authority Having Jurisdiction shall be permitted to require evidence to indicate such authority.

    (6) Give such other data and information in accordance with the Authority Having Jurisdiction.

    104.3.1 Construction Documents. Construction documents, engineering calculations, diagrams, and other data shall be submitted in two or more sets, or in a digital format where permitted by the Authority Having Jurisdiction, with each application for a permit. The construction documents, computations, and specifications shall be prepared by, and the plumbing designed by, a registered design professional. Construction documents shall be drawn to scale with clarity to identify that the intended work to be performed is in accordance with the code.

    Exception: The Authority Having Jurisdiction shall be permitted to waive the submission of construction documents, calculations, or other data where the Authority Having Jurisdiction finds that the nature of the work applied for is such that reviewing of construction documents is not necessary to obtain compliance with the code.

    104.3.2 Plan Review Fees. Where a plan or other data is required to be submitted in accordance with Section 104.3.1, a plan review fee shall be paid at the time of submitting construction documents for review.

    The plan review fees for plumbing work shall be determined and adopted by this jurisdiction.

    The plan review fees specified in this subsection are separate fees from the permit fees specified in Section 104.5.

    Where plans are incomplete or changed so as to require additional review, a fee shall be charged at the rate shown in Table 104.5.

    104.3.3 Time Limitation of Application. Applications for which no permit is issued within 180 days following the date of application shall expire by limitation, plans and other data submitted for review thereafter, shall be returned to the applicant or destroyed by the Authority Having Jurisdiction. The Authority Having Jurisdiction shall be permitted to exceed the time for action by the applicant for a period not to exceed 180 days upon request by the applicant showing that circumstances beyond the control of the applicant have prevented the action from being taken. No application shall be extended more than once. In order to renew action on an application after expiration, the applicant shall resubmit plans and pay a new plan review fee. 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

  • CPC § 104.5 High relevance — show source text

    accordance with the requirements of the code and other pertinent laws and ordinances and that the fees specified in Section 104.5 have been paid, the Authority Having Jurisdiction shall issue a permit therefore to the applicant. 104.4.1 Approved Plans or Construction Docu- ments. Where the Authority Having Jurisdiction issues the permit where plans are required, the Authority Having Jurisdiction shall endorse in writing or stamp the construction documents “APPROVED.” Such approved construction documents shall not be changed, modified, or altered without authorization from the Authority Having Jurisdiction, and the work shall be done in accordance with approved plans.

    The Authority Having Jurisdiction shall be permitted to issue a permit for the construction of a part of a plumbing system before the entire construction documents for the whole system have been submitted or approved, provided adequate information and detailed statements have been filed in accordance with the pertinent requirements of this code. The holder of such permit shall be permitted to proceed at the holder’s risk without assurance that the permit for the entire building, structure, or plumbing system will be granted. 104.4.2 Validity of Permit. The issuance of a permit or approval of construction documents shall not be construed to be a permit for, or an approval of, a violation of the provisions of this code or other ordinance of the jurisdiction. No permit presuming to give authority to violate or cancel the provisions of this code shall be valid.

    The issuance of a permit based upon plans, specifications, or other data shall not prevent the Authority Having Jurisdiction from thereafter requiring the correction of errors in said plans, specifications, and other data or from preventing building operations being carried on thereunder where in violation of this code or of other ordinances of this jurisdiction. 104.4.3 Expiration. A permit issued by the Authority Having Jurisdiction under the provisions of this code shall expire by limitation and become null and void where the work authorized by such permit is not commenced within 180 days from the date of such permit, or where the work authorized by such permit is suspended or abandoned at a time after the work is commenced for a period of 180 days. Before such work is recommenced, a new permit shall first be obtained to do so, and the fee, therefore, shall be one-half the amount required for a new permit for such work, provided no changes have been made or will be made in the original construction documents for such work, and provided further that such suspensions or abandonment has not exceeded 1 year. 104.4.3.1 Expiration. [BSC] On or after January 1, 2019, every permit issued shall become invalid unless the work on the site authorized by such permit is commenced within 12 months after its issuance or if the work authorized on the site by such permit is suspended or abandoned for a period of 12 months after the time the work is commenced. The building official is authorized to grant, in writing, one or more extensions of time, for periods not more than 180

    2025 CALIFORNIA PLUMBING CODE 23

    ), 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

    days each. The extension shall be requested in writ- ing and justifiable cause demonstrated. (See Health and Safety Code Section 18938.5 and 18938.6). **104.4.4 Extensions.

  • CPC § 31-2022 High relevance — show source text

    2025 CALIFORNIA PLUMBING CODE 453

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    454 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    "The information contained in this appendix is not part of this American National Standard (ANS) and has not been processed in accordance with ANSI's requirements for an ANS. As such, this appendix may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the standard."

    The following IAPMO Installation Standard is included here for the convenience of the users of the Uniform Plumbing Code. It is not considered as a part of the Uniform Plumbing Code unless formally adopted as such. This Installation Standard is an independent, stand-alone document published by the International Association of Plumbing and Mechanical Officials and is printed herein by the expressed written permission of IAPMO.

    INSTALLATION STANDARD FOR PEX TUBING SYSTEMS

    FOR HOT- AND COLD-WATER DISTRIBUTION

    IAPMO IS 31-2022

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency, or referenced in the adopting ordinance.

    1 Scope

    1.1 General

    1.1.1 This Standard specifies requirements for the installation of SDR 9 CTS crosslinked polyethylene (PEX) tubing and fittings, including cold-expansion, crimp, press, and mechanical compression fittings, intended for hot- and cold-water distribution systems within buildings.

    1.1.2 This Standards applies to

    (a) SDR 9 CTS PEX tubing complying with ASTM F876 and pressure-rated in accordance with PPI TR-3; and (b) PEX fitting systems complying with (i) ASTM F877, for mechanical compression fittings and metal or plastic insert fittings with stainless steel press sleeves; (ii) ASTM F1807 or ASTM F2159, for metal or plastic insert fittings with copper crimp rings; (iii) ASTM F1960, for cold expansion fittings with PEX reinforced rings; or (iv) ASTM F2080, for cold expansion fittings with metal compression sleeves. 1.2 Terminology

    In this Standard,

    (a) “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard; (b) “should” is used to express a recommendation, but not a requirement; (c) “may” is used to express an option or something permissible within the scope of the Standard; and (d) “can” is used to express a possibility or a capability. Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informa

    tive material from the text. Notes to tables and figures are considered part of the table or figure and can be written as requirements.

    1.3 Units of Measurement

    SI units are the primary units of record in global commerce. In this Standard, the inch/pound units are shown in parentheses. The values stated in each measurement system are equivalent in application, but each unit system is to be used independently. All references to gallons are to U.S. gallons.

    2 Reference Publications

  • CPC § 100.1 Medium relevance — show source text

    36 2025 CALIFORNIA ENERGY CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    ALL OCCUPANCIES—GENERAL PROVISIONS

    FIGURE 100.1-A CALIFORNIA CLIMATE ZONES

    Climate Zones for Residential and Nonresidential Occupancies

    2025 CALIFORNIA ENERGY CODE 37

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    38 2025 CALIFORNIA ENERGY CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    2 ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE

    MANUFACTURE, CONSTRUCTION AND INSTALLATION OF SYSTEMS, EQUIPMENT AND BUILDING COMPONENTS

    SECTION 110.0—SYSTEMS AND EQUIPMENT—GENERAL

    Sections 110.1 through 110.12 specify requirements for manufacturing, construction and installation of certain systems, equipment, appliances and building components that are installed in buildings within the scope of Section 100.0(a).

    Note: The requirements of Sections 110.0 through 110.12 apply to newly constructed buildings. Sections 141.0 and 150.2 specify which requirements of Sections 110.1 through 110.12 also apply to additions and alterations to existing buildings.

    (a) General Requirements. Systems, equipment, appliances and building components shall only be installed in a building within the scope of Section 100.0(a) regulated by Part 6 only if:

    1. The manufacturer has certified that the system, equipment, appliances or building component complies with the applicable manufacturing provisions of Sections 110.1 through 110.12; and
    2. The system, equipment, appliance or building component complies with all applicable installation provisions of Sections 110.1 through 110.12.

    (b) Certification Requirements for Manufactured Systems, Equipment, Appliances and Building Components.

    1. Appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations shall only be installed if they have been certified to the Energy Commission by the manufacturer, pursuant to the provisions of Title 20 California Code of Regulations, Section 1606; or
    2. Systems, equipment, appliances and building components that are required by Part 6 or the Reference Appendices to be certified to the Energy Commission, which are not appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations, shall only be installed if they are certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that: A. All the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable requirements of Part 6; and B. The equipment, product, or device was tested using the test procedure specified in Part 6 if applicable
    3. The certification status of any system, equipment, appliance or building component shall be confirmed only by reference to: A. A directory published or approved by the Commission; or B. A copy of the application for certification from the manufacturer and the letter of acceptance from the Commission staff; or C. Written confirmation from the publisher of a Commission-approved directory that a device has been certified; or D. A Commission-approved label on the device.

    Note: Part 6 does not require a builder, designer, owner, operator, or enforcing agency to test any certified device to determine its compliance with minimum specifications or efficiencies adopted by the Commission.

  • CPC § 25218.5 Medium relevance — show source text

    (b) Certification Requirements for Manufactured Systems, Equipment, Appliances and Building Components.

    1. Appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations shall only be installed if they have been certified to the Energy Commission by the manufacturer, pursuant to the provisions of Title 20 California Code of Regulations, Section 1606; or
    2. Systems, equipment, appliances and building components that are required by Part 6 or the Reference Appendices to be certified to the Energy Commission, which are not appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations, shall only be installed if they are certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that: A. All the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable requirements of Part 6; and B. The equipment, product, or device was tested using the test procedure specified in Part 6 if applicable
    3. The certification status of any system, equipment, appliance or building component shall be confirmed only by reference to: A. A directory published or approved by the Commission; or B. A copy of the application for certification from the manufacturer and the letter of acceptance from the Commission staff; or C. Written confirmation from the publisher of a Commission-approved directory that a device has been certified; or D. A Commission-approved label on the device.

    Note: Part 6 does not require a builder, designer, owner, operator, or enforcing agency to test any certified device to determine its compliance with minimum specifications or efficiencies adopted by the Commission.

    Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code . Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5 , 2 5402.8, and 25943, Public Resources Code.

    SECTION 110.1—MANDATORY REQUIREMENTS FOR APPLIANCES

    (a) Any appliance regulated by the Appliance Efficiency Regulations, Title 20 California Code of Regulations, Section 1601 et seq., may be installed only if the appliance fully complies with Section 1608(a) of those regulations.

    (b) Except for those circumstances described in Section 110.1(c), conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be verified utilizing data from either:

    1. The Energy Commission’s database of certified appliances maintained pursuant to Title 20 California Code of Regulations Section 1606, and which is available at: www.energy.ca.gov/appliances/database/ ; or
    2. An equivalent directory published by a federal agency; or
    3. An approved trade association directory as defined in Title 20 California Code of Regulations Section 1606(h).

    (c) Conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be demonstrated either by default to the mandatory efficiency levels specified in Part 6 or by following procedures approved by the Commission pursuant to Section 10-109 of Title 24, Part 1, when:

    1. Data to verify conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards is not available pursuant to subdivision (b); or
    2. Field verification and diagnostic testing is required for compliance with Part 6 and the Energy Commission has not approved a field verification and diagnostic test protocol that is applicable to the appliance; or
  • CPC § 0-60 Medium relevance — show source text

    e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)**| |Maximum Allow-
    able Stress Design
    Wind Speed,****Vasd
    f
    (mph)    |Mean roof
    height (feet)|Roof slope < 5:12|Roof slope 5:12 < 12:12|Roof slope 12:12 and over| |85|0-60|Fasteners are not required.
    Tiles with installed weight less
    than 9 lbs./sq. ft. require not
    fewer than one fastener per tile.|One fastener per tile every other
    row. Perimeter tiles require one
    fastener. Tiles with installed weight
    less than 9 lbs./sq. ft. require not
    fewer than one fastener per tile.|One fastener required for
    every tile. Tiles with
    installed weight less than 9
    lbs./sq. ft. require not fewer
    than one fastener per tile.| |100|0-40|0-40|0-40|0-40| |100|> 40-60|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
    Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
    of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
    Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
    of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
    Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
    of roofer’s mastic.| |110|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |120|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |130|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |All|> 60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.

  • CPC § 1502.2 Medium relevance — show source text

    1||||X|X|||||||||||||||||||| |1502.2||||X|X|||||||||||||||||||| |1503.3 – 1503.4|||X|||||||||||||||||||||| |1505 – 1507|||X|||||||||||||||||||||| |1507.3.10||||||||X|X|X|X|X||X|X|||||||||| |1507.7.8||||||||X|X|X|X|X||X|X|||||||||| |1509 – 1511|||X|||||||||||||||||||||| |1511.9.6||||||X|X|||||||||||||||||| |1511.10– 1511.10.1|X|||X|X|||X|X|X|X|X||X|X|||||||||| |1512|||X|||||||||||||||||||||| |1513||||||||X|X|X|X|X||X|X||||||||||

    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 BUILDING CODE 15-1

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    15-2 2025 CALIFORNIA BUILDING CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    15 ROOF ASSEMBLIES AND ROOFTOP STRUCTURES

    User notes:

    About this chapter: Chapter 15 provides minimum requirements for the design and construction of roof assemblies and rooftop structures. The criteria address the weather-protective barrier at the roof and, in most circumstances, a fire-resistant barrier. The chapter is largely prescriptive in nature and is based on decades of experience with various traditional materials, but it also recognizes newer products. Section 1511 addresses rooftop structures, which include penthouses, tanks, towers and spires. Rooftop penthouses larger than prescribed in this chapter must be treated as a story under Chapter 5.

    ICC code development note: Code change proposals to sections preceded by the designation [BF] or [P] will be considered by one of the code development committees meeting during the 2024 (Group A) Code Development Cycle. All other code change proposals will be considered by a code development committee meeting during the 2025 (Group B) Code Development Cycle.

    SECTION 1501—GENERAL

    1501.1 Scope. The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies, and rooftop structures.

    SECTION 1502—ROOF DRAINAGE

    [P] 1502.1 General. Design and installation of roof drainage systems shall comply with this section, Section 1611 of this code and Chapter 11 of the California Plumbing Code .

    [P] 1502.2 Secondary (emergency overflow) drains or scuppers. Where roof drains are required, secondary (emergency overflow) roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason. The installation and sizing of secondary emergency overflow drains, leaders and conductors shall comply with Section 1611 of this code and Chapter 11 of the California Plumbing Code .

  • CPC § 1.11.0. Medium relevance — show source text

    Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section|BSC|BSC-
    CG|SFM|1|2|1-AC|AC|** SS**|SS/CC|1|1R|2|3|4|5|6|6|6|6|6|6|6|6|6| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section|||X|||||||X|X|X|X|X|X|X||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/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 303

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    304 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CHAPTER 14

    FIRESTOP PROTECTION

    1401.0 General.

    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. 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 accordance with this chapter, the building code, and the manufacturer’s installation instructions.

  • CPC § 1501.1 Medium relevance — show source text

    ICC code development note: Code change proposals to sections preceded by the designation [BF] or [P] will be considered by one of the code development committees meeting during the 2024 (Group A) Code Development Cycle. All other code change proposals will be considered by a code development committee meeting during the 2025 (Group B) Code Development Cycle.

    SECTION 1501—GENERAL

    1501.1 Scope. The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies, and rooftop structures.

    SECTION 1502—ROOF DRAINAGE

    [P] 1502.1 General. Design and installation of roof drainage systems shall comply with this section, Section 1611 of this code and Chapter 11 of the California Plumbing Code .

    [P] 1502.2 Secondary (emergency overflow) drains or scuppers. Where roof drains are required, secondary (emergency overflow) roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason. The installation and sizing of secondary emergency overflow drains, leaders and conductors shall comply with Section 1611 of this code and Chapter 11 of the California Plumbing Code .

    1502.3 Gutters. Gutters and leaders placed on the outside of buildings, other than Group R-3, private garages and buildings of Type V construction, shall be of noncombustible material or not less than Schedule 40 plastic pipe.

    SECTION 1503—WEATHER PROTECTION

    1503.1 General. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. Roof coverings shall be designed in accordance with this code, and installed in accordance with this code and the manufacturer’s approved instructions.

    1503.2 Flashing. Flashing shall be installed in such a manner so as to prevent water from entering the wall and roof through joints in copings, through moisture-permeable materials and at intersections with parapet walls and other penetrations through the roof plane.

    1503.2.1 Locations. Flashing shall be installed at wall and roof intersections, at gutters, wherever there is a change in roof slope or direction and around roof openings. Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (0.483 mm) (No. 26 galvanized sheet).

    1503.3 Parapet walls. Parapet walls shall be coped or covered in accordance with Sections 1503.3.1 and 1503.3.2. The top surface of the parapet wall shall provide positive drainage.

    1503.3.1 Fire-resistance-rated parapet walls. Parapet walls required by Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall such that the fire-resistance rating of the wall is not decreased.

    1503.3.2 Other parapet walls. Parapet walls meeting one of the exceptions in Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall.

    1503.4 Attic and rafter ventilation. Intake and exhaust vents for ventilation of attic and enclosed rafter assemblies shall be provided in accordance with Section 1202.2 and the vent product manufacturer’s installation instructions.

  • CPC § 6.3.1. Medium relevance — show source text

    6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |130|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |All|> 60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)    |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)    |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)    |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)    |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
    (Installations on spaced/solid sheathing with battens or spaced sheathing)    | |Maximum Allow-
    able Stress Design
    Wind Speed,****Vasd
    f
    (mph)    |Mean roof
    height (feet)|Roof slope < 5:12|Roof slope 5:12 < 12:12|Roof slope 12:12 and over| |85|0-60|Fasteners are not required.
    Tiles with installed weight less
    than 9 lbs./sq. ft. require not
    fewer than one fastener per tile.|One fastener per tile every other
    row. Perimeter tiles require one
    fastener. Tiles with installed weight
    less than 9 lbs./sq. ft. require not
    fewer than one fastener per tile.|One fastener required for
    every tile. Tiles with
    installed weight less than 9
    lbs./sq. ft. require not fewer
    than one fastener per tile.| |100|0-40|0-40|0-40|0-40| |100|> 40-60|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
    Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
    of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
    Rake5 tiles shall be nailed with two nails.

  • CPC § 1.11. Medium relevance — show source text

    Entire Chapter|X||X|||||||||||||||||||||| |Adopt Entire Chapter as
    amended (amended
    sections listed below)||||||||||||||||||||||||| |Adopt only those sections
    that are listed below||||X|X|||||||||||||||||||| |Chapter / Section||||||||||||||||||||||||| |1501||||X|X|||||||||||||||||||| |1505||||X|X|||||||||||||||||||| |1506||||X|X|||||||||||||||||||| |1508||||X|X|||||||||||||||||||| |1511||||X|X||||||||||||||||||||

    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 15-1

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    15-2 2025 CALIFORNIA EXISTING BUILDING CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    15 CONSTRUCTION SAFEGUARDS

    User notes:

    About this chapter: Chapter 15 looks to the construction process. Parameters are provided for demolition and for protecting adjacent property during demolition and construction. Issues such as how to provide egress and adequate water supply while the building is growing, the timing of standpipe and sprinkler installation, and protection of pedestrians are addressed. Note that this chapter is consistent with Chapter 33 of the California Building Code and Chapter 33 of the California Fire Code.

    SECTION 1501—GENERAL

    [BG] 1501.1 Scope. The provisions of this chapter shall govern safety during construction and the protection of adjacent public and private properties. Fire safety during construction shall also comply with the applicable provisions of Chapter 33 of the California Fire Code.

    [BG] 1501.2 Storage and placement of construction equipment and materials. Construction equipment and materials shall be stored and placed so as not to endanger the public, the workers or adjoining property for the duration of the construction project.

    [BS] 1501.3 Roof loads. Structural roof components shall be capable of supporting the roof-covering system and the material and equipment loads that will be encountered during installation of the system.

    [BG] 1501.4 Maintenance of exits, existing structural elements, fire protection devices and sanitary safeguards. Required exits, existing structural elements, fire protection devices and sanitary safeguards shall be maintained at all times during alterations, repairs or additions to any building or structure.

    Exceptions:

    1. Where such required elements or devices are being altered or repaired, adequate substitute provisions shall be made.
    2. Maintenance of such elements and devices is not required where the existing building is not occupied.

    [BG] 1501.5 Removal of waste materials. Waste materials shall be removed in a manner that prevents injury or damage to persons, adjoining properties and public rights-of-way.

    SECTION 1502—OWNER’S RESPONSIBILITY FOR FIRE PROTECTION

  • CPC § 100.0 Medium relevance — show source text

    Exception 1 to Section 100.0(f): If one occupancy constitutes at least 80 percent of the conditioned floor area of the building, the entire building envelope, HVAC and water heating may be designed to comply with the provisions of Part 6 applicable to that occupancy, provided that the applicable lighting requirements in Sections 140.6 through 140.8, 150.0(k), or 160.5 and 170.2(e) are met for each occupancy and space, and mandatory measures in Sections 110.0 through 130.5, 150.0, and 160.0 through 160.9 are met for each occupancy and space.

    Exception 2 to Section 100.0(f): If one occupancy constitutes at least 90 percent of the combined conditioned plus unconditioned floor area of the building, the entire building indoor lighting may be designed to comply with only the lighting provisions of Part 6 applicable to that occupancy.

    (g) Administrative requirements. Administrative requirements relating to permit requirements, enforcement by the Commission, locally adopted energy standards, interpretations, claims of exemption, approved calculation methods, rights of appeal, and certification and labeling requirements of fenestration products and roofing products are specified in California Code of Regulations, Title 24, Part 1, Sections 10-101 to 10-114.

    (h) Certification requirements for manufactured equipment, products and devices. Part 6 limits the installation of manufactured equipment, products and devices to those that have been certified as specified by Sections 110.0 and 110.1. Requirements for manufactured equipment, products, and devices, when not specified in Title 24 Part 6, are specified in California Code of Regulations, Title 20, Sections 1601–1609.

    Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code . Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code .

    SECTION 100.1 — DEFINITIONS AND RULES OF CONSTRUCTION

    (a) Rules of Construction.

    1. Where the context requires, the singular includes the plural and the plural includes the singular.
    2. The use of “and” in a conjunctive provision means that all elements in the provision must be complied with or must exist to make the provision applicable. Where compliance with one or more elements suffices, or where existence of one or more elements makes the provision applicable, “or” (rather than “and/or”) is used.
    3. “Shall” is mandatory and “may” is permissive.

    (b) Definitions. Terms, phrases, words and their derivatives in Part 6 shall be defined as specified in Section 100.1. Terms, phrases, words and their derivatives not found in Section 100.1 shall be defined as specified in the “Definitions” chapters of Title 24, Parts 1 through 5 of the California Code of Regulations. Where terms, phrases, words and their derivatives are not defined in any of the references above, they shall be defined as specified in Webster’s Third New International Dictionary of the English Language, Unabridged (1961 edition, through the 2002 addenda), unless the context requires otherwise.

  • CPC § 1501.0 Medium relevance — show source text

    CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

    CHAPTER 15 - ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

    (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
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1501.0
    1501.1
    1501.1.1
    1501.2
    1501.2 Exceptions
    1501.3
    1501.3 & Exception
    1501.4
    1501.5
    1501.5 Exception
    Table 1501.5
    1501.5.1
    1501.6
    1501.7
    1501.8
    1501.9
    1501.9.1
    1501.9.2
    1501.10
    1502.0
    1502.1
    1502.1 Exception
    1502.3
    1502.3.2
    1502.3.3
    1502.4 Exception
    1502.5 - 1502.6
    1503.0
    1503.1
    1503.1.1
    1503.1.1 - 1503.1.3
    1503.2 - 1503.2.3
    1503.2.2 Exception
    1503.3 & Exceptions
    1503.4 Exception
    Table 1503.4    		 BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1501.0
    1501.1
    1501.1.1
    1501.2
    1501.2 Exceptions
    1501.3
    1501.3 &Exception
    1501.4
    1501.5
    1501.5_Exception_
    Table 1501.5
    1501.5.1
    1501.6
    1501.7
    1501.8
    1501.9
    1501.9.1
    1501.9.2
    1501.10
    1502.0
    1502.1
    1502.1_Exception_
    1502.3
    1502.3.2
    1502.3.3
    1502.4 Exception
    1502.5 - 1502.6
    1503.0
    1503.1
    1503.1.1
    _1503.1.1 - 1503.1.
  • CPC § 1.11.2.3 Medium relevance — show source text

    1.11.2.3 More restrictive fire and panic safety building standards.

    1.11.2.3.1 Any fire protection district organized pursuant to Health and Safety Code Part 2.7 (commencing with Section 13800) of Division 12 may adopt building standards relating to fire and panic safety that are more stringent than those building standards adopted by the State Fire Marshal and contained in the California Building Standards Code. For these purposes, the district board shall be deemed a legislative body and the district shall be deemed a local agency. Any changes or modifications that are more stringent than the requirements published in the California Building Standards Code relating to fire and panic safety shall be subject to Section 1.1.8.1.

    1.11.2.3.2 Any fire protection district that proposes to adopt an ordinance pursuant to this section shall, not less than 30 days prior to noticing a proposed ordinance for public hearing, provide a copy of that ordinance, together with the adopted findings made pursuant to Section 1.11.2.3.1, to the city, county, or city and county where the ordinance will apply. The city, county, or city and county may provide the district with written comments, which shall become part of the fire protection district’s public hearing record.

    1.11.2.3.3 The fire protection district shall transmit the adopted ordinance to the city, county, or city and county where the ordi- nance will apply. The legislative body of the city, county, or city and county may ratify, modify or deny an adopted ordinance and transmit its determination to the district within 15 days of the determination. Any modification or denial of an adopted ordinance shall include a written statement describing the reasons for any modifications or denial. No ordinance adopted by the district shall be effective until ratification by the city, county, or city and county where the ordinance will apply. Upon ratification of an adopted ordinance, the city, county or city and county shall file a copy of the findings of the district, and any findings of the city, county, or city and county, together with the adopted ordinance expressly marked and identified to which each finding refers, in accordance with Section 1.1.8.1(3).

    1.11.2.4 Request for alternate means of protection. Requests for approval to use an alternative material, assembly or materials, equipment, method of construction, method of installation of equipment or means of protection shall be made in writing to the enforcing agency by the owner or the owner’s authorized representative and shall be accompanied by a full statement of the condi- tions. Sufficient evidence or proof shall be submitted to substantiate any claim that may be made regarding its conformance. The enforcing agency may require tests and the submission of a test report from an approved testing organization as set forth in Title 19, California Code of Regulation, to substantiate the equivalency of the proposed alternative means of protection.

    When a request for alternate means of protection involves hazardous materials, the authority having jurisdiction may consider implementation of the findings and recommendations identified in a Risk Management Plan (RMP) developed in accordance with Title 19, Division 5, Chapter 2, Article 3.

    Approval of a request for use of an alternative material, assembly of materials, equipment, method of construction, method of installation of equipment or means of protection made pursuant to these provisions shall be limited to the particular case covered by request and shall not be construed as establishing any precedent for any future request.

  • CPC § 110.1 Medium relevance — show source text

    SECTION 110.1—MANDATORY REQUIREMENTS FOR APPLIANCES

    (a) Any appliance regulated by the Appliance Efficiency Regulations, Title 20 California Code of Regulations, Section 1601 et seq., may be installed only if the appliance fully complies with Section 1608(a) of those regulations.

    (b) Except for those circumstances described in Section 110.1(c), conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be verified utilizing data from either:

    1. The Energy Commission’s database of certified appliances maintained pursuant to Title 20 California Code of Regulations Section 1606, and which is available at: www.energy.ca.gov/appliances/database/ ; or
    2. An equivalent directory published by a federal agency; or
    3. An approved trade association directory as defined in Title 20 California Code of Regulations Section 1606(h).

    (c) Conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be demonstrated either by default to the mandatory efficiency levels specified in Part 6 or by following procedures approved by the Commission pursuant to Section 10-109 of Title 24, Part 1, when:

    1. Data to verify conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards is not available pursuant to subdivision (b); or
    2. Field verification and diagnostic testing is required for compliance with Part 6 and the Energy Commission has not approved a field verification and diagnostic test protocol that is applicable to the appliance; or
    3. The appliance meets the requirements of Section 110.1(a) but has been site-modified in a way that affects its performance; or

    2025 CALIFORNIA ENERGY CODE 39

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE MANUFACTURE, CONSTRUCTION AND INSTALLATION OF SYSTEMS, EQUIPMENT AND BUILDING COMPONENTS

    1. The U.S. Department of Energy has approved a waiver from federal test procedures, pursuant to 10 CFR Section 430.27 or Section 431.401 and that waiver fails to specify how the efficiency of the system shall be determined.

    Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code . Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5 , 2 5402.8, and 25943, Public Resources Code.

    SECTION 110.2—MANDATORY REQUIREMENTS FOR SPACE-CONDITIONING EQUIPMENT

    Certification by manufacturers. Any space-conditioning equipment listed in this section may be installed only if the manufacturer has certified to the Commission that the equipment complies with all the applicable requirements of this section.

    (a) Efficiency. Equipment shall meet the applicable efficiency requirements in Tables 110.2-A through 110.2-L, subject to the following:

    1. If more than one efficiency standard is listed for any equipment in Tables 110.2-A through 110.2-L, the equipment shall meet all the applicable standards that are listed; and
    2. If more than one test method is listed in Tables 110.2-A through 110.2-L, the equipment shall comply with the applicable efficiency standard when tested with each listed test method; and
  • CPC § 4.303.1 Medium relevance — show source text

    APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

    SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

    FEATURE OR MEASURE LEVELS
    APPLICANT TO SELECT ELECTIVE MEASURES    		 Col3 Col4 VERIFICATIONS
    ENFORCING AGENCY TO SPECIFY
    VERIFICATION METHOD    		 Col6 Col7
    FEATURE OR MEASURE Mandatory Prerequisites and electives1 Prerequisites and electives1 Enforcing
    Agency

    All    		 Installer or
    Designer

    All    		 Third
    party

    All
    FEATURE OR MEASURE Mandatory Tier 1 Tier 2 Tier 2 Tier 2 Tier 2
    WATER EFFICIENCY AND CONSERVATION
    Indoor Water Use
    4.303.1Plumbing fixtures (water closets and urinals) and fittings
    (showerheads, faucets and pre-rinse spray valves) installed in
    residential buildings shall comply with the prescriptive requirements
    of Sections 4.303.1.1 through 4.303.1.4.5.
    4.303.2 Submeters for multifamily building and dwelling units in
    mixed-use residential/commercial buildings. Submeters shall be
    installed to measure water usage of individual rental dwelling units in
    accordance with the_California Plumbing Code._
    4.303.3Plumbing fixtures and fittings required in Section 4.303.1
    shall be installed in accordance with the_California Plumbing Code,_
    and shall meet the applicable referenced standards.
    A4.303.1The maximum flow rate of kitchen faucets shall not exceed
    1.5 gallons per minute at 60 psi. Kitchen faucets may temporarily
    increase the flow above the maximum rate, but not to exceed 2.2
    gallons per minute at 60 psi, and must default to a maximum flow rate
    of 1.5 gallons per minute at 60 psi.
    **Note:**Where complying faucets are unavailable, aerators or other
    means may be used to achieve reduction.
    4.303.1.4.3 Metering faucets in residential buildings shall not deliver
    more than 0.2 gallons per cycle.
    A4.303.2Alternate water source for nonpotable applications.
    Alternate nonpotable water sources are used for indoor potable water
    reduction. Alternate nonpotable water sources shall be installed in
    accordance with the_California Plumbing Code._
    **A4.303.
  • CPC § 1.11.0. Medium relevance — show source text

    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.

    58 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CHAPTER 4

    PLUMBING FIXTURES AND FIXTURE FITTINGS

    Note: In addition to the requirements of this chapter, buildings or facilities where accessibility is required for applications listed in California Code of Regulations, Title 24, Part 2 (California Building Code), Chapter 1, Section 1.9.1 regulated by the Division of the State Architect–Access Compliance shall also comply with Title 24, Part 2, Chapter 11A or 11B, as applicable under authority cited by CA Government Code Section 4450 and in reference cited by CA Government Code Sections 4450 through 4461, 12955.1(c), and CA Health and Safety Code Sections 18949.1, 19952 through 19959.

    401.0 General.

    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. 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. 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 replaced with appropriate water-conserving plumbing fix- tures under specific circumstances. See Civil Code Section 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.

  • CPC § 422.1 Medium relevance — show source text

    1
    422.1 Exception
    Table 422.1
    422.1.1
    422.1.3
    422.1.4
    422.2
    422.2 Exceptions
    422.2 Exception (4)
    422.3.1 & Exception
    422.4
    422.5
    422.6_Exception (3)
    422.7_Exception (2)
    422.8
    422.9
    422.10
    422.11
    Table 4-1
    Table 4-2
    Table 4-3
    Table 4-4|||||||||||||||||||X|||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    422.1
    422.1 Exception
    Table 422.1
    422.1.1
    422.1.3
    422.1.4
    422.2
    422.2 Exceptions
    422.2 Exception (4)
    422.3.1 & Exception
    422.4
    422.5
    422.6_Exception (3)
    422.7_Exception (2)
    422.8
    422.9
    422.10
    422.11
    Table 4-1
    Table 4-2
    Table 4-3
    Table 4-4||||||||||||||||||X|||||||

    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.

    58 2025 CALIFORNIA PLUMBING CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CHAPTER 4

    PLUMBING FIXTURES AND FIXTURE FITTINGS

    Note: In addition to the requirements of this chapter, buildings or facilities where accessibility is required for applications listed in California Code of Regulations, Title 24, Part 2 (California Building Code), Chapter 1, Section 1.9.1 regulated by the Division of the State Architect–Access Compliance shall also comply with Title 24, Part 2, Chapter 11A or 11B, as applicable under authority cited by CA Government Code Section 4450 and in reference cited by CA Government Code Sections 4450 through 4461, 12955.1(c), and CA Health and Safety Code Sections 18949.1, 19952 through 19959.

    401.0 General.

    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. 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.

Frequently asked questions

Do I always need a licensed plumber to pull the permit?

Not necessarily — licensing requirements are determined by the AHJ and by state contractor licensing law; the CPC notes that the AHJ may require licensing or evidence of competency (see § 103.3.1).

If I submit plans electronically, how many sets do I need?

The CPC permits the AHJ to accept digital submissions; where required, construction documents shall be submitted in two or more sets or in an approved digital format (see § 104.3.1).

What happens if I start work and then the AHJ requires plans?

If work was started without a permit, the AHJ will require a special investigation and will collect an investigation fee equal to the permit fee in addition to requiring the normal permit and probably plan submissions (see § 104.5.2).

Are recycled water systems treated differently?

Yes — recycled (reclaimed) water systems require a permit and complete plans; AHJs must coordinate with the State Water Resources Control Board, purveyors, and public health as required (see § 1505.2 and § 1505.2.1).

If my project is only replacing a toilet, do I need plans?

Replacing a toilet is generally included in the permit‑exempt clearing/repair exceptions when no rearrangement occurs. But if replacement involves changing drainage/waste/vent routing or other pipe replacement, it is not exempt and a permit (and possibly plans) are required (see § 104.2 and § 104.3.1).

More in California Plumbing Code

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

Related in the CPC

When do Chapters 15 and 16 apply?

Who must design the system and what are the exemptions?

Overview & Permits

California Plumbing Code