CPC · California Plumbing Code

Which referenced standards apply to different fixture materials and fittings?

Summary: The CPC requires fixtures and fittings to conform to the specific standards listed in Table 1701.1 (made part of the code by **§ 1701.1**). To pick the correct standard, find the fixture material or fitting type in Table 1701.1 (e.g., ceramic = ASME A112.19.2, stainless steel = ASME A112.19.3, supply fittings = ASME A112.18.1, waste fittings = ASME A112.18.2), and install only products that are third‑party listed and properly marked as required by **§ 301.2 / § 301.2.1**. If a product or material is not listed in the table you must get AHJ approval under § 301.2.2.

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Last reviewed: July 6, 2026

What the code requires — plain English

The California Plumbing Code makes the standards listed in Table 1701.1 part of the code and requires that fixtures, fixture fittings and materials conform to the applicable referenced standard(s) shown there; the application of those standards is governed by § 1701.1 (Table 1701.1) and the general standards rules in § 301.2 / § 301.2.2. § 407.1, § 408.1, and § 409.1 are the chapter sections that reference fixture material standards for many plumbing fixtures (see Table 1701.1 entries).

The most important rule: use the standard listed in Table 1701.1 for the fixture material or fitting you are installing, and install only third‑party listed products that are marked as required by the applicable standard and listing agency (see § 1701.1 and § 301.2).

Requirements in detail

Short version: consult Table 1701.1 to map a fixture material or fitting type to the specific national/consensus standard the CPC requires. The Table lists the standard number, its title, the application category (Fixtures or Fittings), and the CPC section(s) that reference that standard (for example § 407.1, § 408.1, § 409.1).

How to read the rule (where to look)

  • § 1701.1 tells you Table 1701.1 contains the referenced standards and that those standards are part of the code. Always start with Table 1701.1 for the mapping.
  • § 301.2 requires materials, fixtures and devices to be third‑party listed to the referenced standards. Markings and listing are required as specified in § 301.2.1.
  • For specific fixture installations check the chapter/section that applies to that fixture (many fixture material standards are listed against § 407.1, § 408.1, § 409.1 in Table 1701.1).

Quick reference table — common fixture materials and the standards the CPC points you to

Fixture material / fitting Common standard (example) Application (decision factor) Code Reference
Ceramic (vitreous china) fixtures (lavs, water closets) ASME A112.19.2 / CSA B45.1 Use for ceramic fixture manufacture and performance § 407.1, § 408.1, § 409.1 (Table 1701.1)
Enameled cast iron / enameled steel fixtures ASME A112.19.1 / CSA B45.2 Use for enameled cast‑iron & steel fixtures § 407.1, § 408.1, § 409.1 (Table 1701.1)
Stainless‑steel fixtures ASME A112.19.3 / CSA B45.4 Use for stainless steel sinks, tubs, lavs § 407.1, § 408.1, § 409.1 (Table 1701.1)
Plastic fixtures (toilet bowls, lavs, shower pans) CSA B45.5 / IAPMO Z124 Use for molded plastic plumbing fixtures § 407.1, § 408.1, § 409.1 (Table 1701.1)
Glass plumbing fixtures CSA B45.11 / IAPMO Z401 Use for glass fixture products § 407.1 (Table 1701.1)
Aluminum and copper plumbing fixtures CSA B45.12 / IAPMO Z402 Use for aluminum or copper‑made fixtures § 407.1, § 408.1, § 409.1 (Table 1701.1)
Terrazzo / concrete / natural stone fixtures CSA B45.8 / IAPMO Z403 Use for cast terrazzo / stone fixtures § 407.1, § 420.1 (Table 1701.1)
Supply fittings (faucets, integral backflow fittings) ASME A112.18.1 / CSA B125.1 Use for faucet performance, backflow‑integrated fittings § 408.4, § 417.x, § 603.5.20 (Table 1701.1)
Waste fittings (strainers, tailpieces) ASME A112.18.2 / CSA B125.2 or ASTM F409 Use for performance of waste fittings and above‑ground DWV § 404.1, § 408.5 (Table 1701.1; § 404.1)
Notes: Table 1701.1 is authoritative for which standard applies to each material/fitting; the examples above are the common mappings listed in that Table.

Important cross‑references that change the application

  • Standards listed in Table 1701.1 are “part of the requirements” and are applied as the referenced CPC sections specify — see § 1701.1.
  • The general rules about standards and marked/listed products are in § 301.2 / § 301.2.1 / § 301.2.2 — these control third‑party listing, markings, and which portion of a multi‑grade standard applies.

Exceptions & special cases

  • The code allows the Authority Having Jurisdiction (AHJ) to approve materials or designs not specifically listed when evidence of adequacy is provided — see § 301.2.2. If a standard covers multiple grades or options, only the applicable portion is required unless the AHJ approves otherwise.
  • Some adoption matrices (state agencies) do not adopt all Uniform Plumbing Code sections; check local adoption notes and the Table 1701.2 adoption flags in the code volume. The state agency adoption notes appear with Table 1701.1.
  • For repairs in existing buildings, the California Existing Building Code cross‑references CPC requirements for materials; for example, Existing Building Code § 408.1 states that plumbing materials used in repairs must not be prohibited by the CPC and that repaired systems comply with CPC and CALGreen where applicable. (This is a bridge between repair work requirements and the CPC standards.)

If you need the literal text of § 407.1, § 408.1 or § 409.1 as printed in the CPC body (not only referenced in Table 1701.1), that specific section text was not located in the retrieved excerpt set; Table 1701.1, however, explicitly links the fixture standards to those sections and § 1701.1 explains Table 1701.1’s legal effect.

Common mistakes

  • Installing a fixture because it “looks like” the right material without verifying the product is third‑party listed to the applicable standard (violates § 301.2 and § 1701.1 expectations).
  • Confusing a fitting standard with a fixture material standard (e.g., using a supply‑fitting standard when a fixture material standard is required). Always check Table 1701.1 for the correct standard mapping.
  • Failing to check marking/labeling — the code requires manufacturer marking and listing information per § 301.2.1. Field marking by installers is not a substitute.
  • Overlooking the AHJ authority: some specialty materials or alternate designs need AHJ approval under § 301.2.2.

Worked example — concrete scenario

Scenario: You are replacing a wall‑mounted lavatory in a commercial restroom and want to select the correct product and fittings.

  1. Identify the fixture material: the lavatory is vitreous china (ceramic). Table 1701.1 shows ASME A112.19.2 / CSA B45.1 is the standard for ceramic plumbing fixtures and that standard is referenced by § 407.1, § 408.1, § 409.1 (see Table 1701.1). Confirm the lavatory is third‑party listed to ASME A112.19.2 / CSA B45.1.

  2. Select waste fitting: Table 1701.1 and § 404.1 indicate waste fittings must comply with ASME A112.18.2 / CSA B125.2 or ASTM F409 for aboveground drainage. Choose a drain/waste assembly listed to ASME A112.18.2.

  3. Verify markings and listing: The product must carry the required listing/mark and the manufacturer name per § 301.2.1. If it lacks the required marking or third‑party listing, do not accept it.

  4. If the lavatory has an integral special material (e.g., a decorative stone rim), check whether CSA B45.8 (stone fixtures) or another standard applies — Table 1701.1 lists terrazzo/stone standards where applicable. If in doubt, get AHJ approval per § 301.2.2.

Numeric check example: before install, verify the waste fitting size matches the lavatory outlet and is listed per ASME A112.18.2. If the lavatory outlet is 1‑1/4" NPT tailpiece, use a listed 1‑1/4" waste fitting per the standard. (Standards and nominal sizes in Table 1701.1 and the referenced fixture sections govern acceptable configurations.)

Related provisions (select CPC sections you will often consult)

  • § 1701.1 — Referenced standards are part of the code; consult Table 1701.1.
  • § 301.2 / § 301.2.1 / § 301.2.2 — Minimum standards, listing/marking, AHJ approval for alternate materials.
  • § 404.1 — Waste fittings must comply with ASME A112.18.2/CSA B125.2, ASTM F409 or Table 701.2 for aboveground drainage.
  • § 402.8 / § 402.9 — Fixtures shall be installed in accordance with manufacturer’s instructions.
  • § 403.3 — Protectors/insulators for exposed waste and supplies (ASME A112.18.9).
  • § 604.1 — Materials for water supply piping, and references to NSF/ANSI standards (e.g., NSF/ANSI 14, NSF/ANSI/CAN 61).

Code references

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

  • CPC § 301.2.4 High relevance — show source text

    Waste, and Vent Piping Applications|Piping, Ferrous|301.2.4, Table 701.2,
    Table 707.2| |CISPI 310-2020|Couplings for Use in Connection with Hubless Cast Iron Soil
    Pipe and Fittings for Sanitary and Storm Drain, Waste, and
    Vent Piping Applications|Joints|301.2.4, 705.2.2| |CSA|CSA|CSA|CSA| |ASME A112.19.2-
    2018/CSA B45.1-2018|Ceramic Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
    410.1, 411.1, 412.1,
    415.1, 420.1| |ASME A112.19.1-
    2018/CSA B45.2-2018|Enameled Cast Iron and Enameled Steel Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
    415.1, 420.1| |ASME A112.19.3-
    2017/CSA B45.4-2017|Stainless Steel Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
    410.1, 411.1, 415.1,
    420.1| |CSA B45.5-2017/IAPMO
    Z124-2017|Plastic Plumbing Fixtures (with Errata dated August 2017)|Fixtures|407.1, 408.1, 409.1,
    411.1, 412.1, 420.1| |CSA B45.8-2018/IAPMO
    Z403-2018|Terrazzo, Concrete, Composite Stone, and Natural Stone
    Plumbing Fixtures|Fixtures|407.1, 420.1| |ASME A112.3.4-2018/CSA
    B45.9-2018|Macerating Toilet Systems and Waste-Pumping Systems for
    Plumbing Fixtures|Fixtures|710.13| |ASME A112.19.7-
    2020/CSA B45.10-2020|Hydromassage Bathtub Systems|Fixtures|409.1, 409.6.1|

    2025 CALIFORNIA PLUMBING CODE 345

    ), 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
    CSA B45.11-2017/IAPMO
    Z401-2017 (R2021)    		 Glass Plumbing Fixtures Fixtures 407.1
    CSA B45.12-2013/IAPMO
    Z402-2013 (R2018)    		 Aluminum and Copper Plumbing Fixtures Fixtures 407.1, 408.1, 409.1,
    420.1
    ASME A112.19.5-
    2017/CSA B45.15-2017    		 Flush Valves and Spuds for Water Closets, Urinals, and Tanks Fixtures 413.3
    ASME A112.4.
  • CPC § 14.3 High relevance — show source text

    14.3-2018|Hydromechanical Grease Interceptors|Fixtures|1014.1, Table 1009.1| |ASME A112.14.4-2001
    (R2017)|Grease Removal Devices|Fixtures|1014.1, Table 1009.1|

    2025 CALIFORNIA PLUMBING CODE 335

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    REFERENCED STANDARDS

    TABLE 1701.1 (continued) REFERENCED STANDARDS

    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    ASME A112.14.6-2010
    (R2019)    		 FOG (Fats, Oils, and Greases) Disposal Systems Fixtures 1015.2, Table 1009.1
    ASME A112.18.1-
    2018/CSA B125.1-2018    		 Plumbing Supply Fittings Fittings 408.4, 417.1, 417.2,
    417.3, 417.4, 417.6,
    603.5.20
    ASME A112.18.2-
    2020/CSA B125.2-2020    		 Plumbing Waste Fittings Fittings 404.1, 408.5
    ASME A112.18.3-2002
    (R2017)    		 Backflow Protection Devices and Systems in Plumbing Fixture
    Fittings    		 Backflow Protection 417.3, 417.4
    ASME A112.18.6-2017/
    CSA B125.6-2017 (R2021)    		 Flexible Water Connectors Piping 604.5, 604.13
    ASME A112.18.8-2020 Sanitary Waste Valves for Plumbing Drainage Systems Sanitary Waste
    Valves    		 814.4
    ASME A112.18.9-2011
    (R2017)    		 Protectors/Insulators for Exposed Waste and Supplies on
    Accessible Fixtures    		 Miscellaneous 403.3
    ASME A112.19.1-
    2018/CSA B45.2-2018    		 Enameled Cast Iron and Enameled Steel Plumbing Fixtures Fixtures 407.1, 408.1, 409.1,
    415.1, 420.1
    ASME A112.19.2-
    2018/CSA B45.1-2018    		 Ceramic Plumbing Fixtures Fixtures 407.1, 408.1, 409.1,
    410.1, 411.1, 412.1,
    415.1, 420.1
    ASME A112.19.3-
    2017/CSA B45.4-2017    		 Stainless Steel Plumbing Fixtures Fixtures 407.1, 408.1, 409.1,
    410.1, 411.1, 415.1,
    420.1
    ASME A112.19.5-
    2017/CSA B45.15-2017    		 Flush Valves and Spuds for Water Closets, Urinals, and Tanks Fixtures 413.3
    ASME A112.19.7-
    2020/CSA B45.
  • CPC § 420.1 High relevance — show source text

    420.1| |CSA B45.8-2018/IAPMO
    Z403-2018|Terrazzo, Concrete, Composite Stone, and Natural Stone
    Plumbing Fixtures|Fixtures|407.1, 420.1| |ASME A112.3.4-2018/CSA
    B45.9-2018|Macerating Toilet Systems and Waste-Pumping Systems for
    Plumbing Fixtures|Fixtures|710.13| |ASME A112.19.7-
    2020/CSA B45.10-2020|Hydromassage Bathtub Systems|Fixtures|409.1, 409.6.1|

    2025 CALIFORNIA PLUMBING CODE 345

    ), 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
    CSA B45.11-2017/IAPMO
    Z401-2017 (R2021)    		 Glass Plumbing Fixtures Fixtures 407.1
    CSA B45.12-2013/IAPMO
    Z402-2013 (R2018)    		 Aluminum and Copper Plumbing Fixtures Fixtures 407.1, 408.1, 409.1,
    420.1
    ASME A112.19.5-
    2017/CSA B45.15-2017    		 Flush Valves and Spuds for Water Closets, Urinals, and Tanks Fixtures 413.3
    ASME A112.4.2-2021/CSA
    B45.16-2021    		 Personal Hygiene Devices for Water Closets Fixtures 411.4
    CSA B64.1.1-2021 Atmospheric Vacuum Breakers (AVB) Backflow Protection Table 603.2
    CSA B64.1.2-2021 Pressure Vacuum Breakers (PVB) Backflow Protection Table 603.2
    CSA B64.2.1.1-2021 Hose Connection Dual Check Vacuum Breakers (HCDVB) Backflow Protection Table 603.2
    CSA B64.4-2021 Reduced Pressure Principle (RP) Backflow Preventers Backflow Protection Table 603.2
    CSA B64.4.1-2021 Reduced Pressure Principle Backflow Preventers for Fire Pro-
    tection Systems (RPF)    		 Backflow Protection Table 603.2
    CSA B64.5-2021 Double Check Valve (DCVA) Backflow Preventers Backflow Protection Table 603.2
    CSA B64.5.1-2021 Double Check Valve Backflow Preventers for Fire Protection
    Systems (DCVAF)    		 Backflow Protection Table 603.2
    CSA B79-2008 (R2018) Commercial and Residential Drains and Cleanouts Fixtures 418.1, Table 707.2
    ASME A112.18.1-
    2018/CSA B125.1-2018    		 Plumbing Supply Fittings Fittings 408.4, 417.1, 417.2,
    417.3, 417.4, 417.6,
    603.5.20
    ASME A112.18.
  • CPC § 4.2 High relevance — show source text

    5(2)| |ASME A112.4.2-2021/CSA
    B45.16-2021|Personal Hygiene Devices for Water Closets|Fixtures|411.4| |ASME A112.4.4-2017|Plastic Push-Fit Drain, Waste, and Vent (DWV) Fittings|Fittings|Table 701.2| |ASME A112.4.14-
    2017/CSA B125.14-2017|Manually Operated Valves for Use in Plumbing Systems|Valves|606.1| |ASME A112.6.1M-1997
    (R2017)|Floor-Affixed Supports for Off-the-Floor Plumbing Fixtures
    for Public Use|Fixtures|402.4| |ASME A112.6.2-2017|Framing-Affixed Supports (Carriers) for Off-the-Floor Plumb-
    ing Fixtures|Fixtures|402.4| |ASME A112.6.3-2019|Floor and Trench Drains|Fixtures|418.1| |ASME A112.6.4-2003
    (R2012)|Roof, Deck, and Balcony Drains|Fixtures|1102.1| |ASME A112.6.7-2010
    (R2019)|Sanitary Floor Sinks|Fixtures|421.1| |ASME A112.6.9-2005
    (R2019)|Siphonic Roof Drains|DWV Components|1106.3| |ASME A112.14.1-2003
    (R2017)|Backwater Valves|Valves|710.6| |ASME A112.14.3-2018|Hydromechanical Grease Interceptors|Fixtures|1014.1, Table 1009.1| |ASME A112.14.4-2001
    (R2017)|Grease Removal Devices|Fixtures|1014.1, Table 1009.1|

    2025 CALIFORNIA PLUMBING CODE 335

    ), 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
    ASME A112.14.6-2010
    (R2019)    		 FOG (Fats, Oils, and Greases) Disposal Systems Fixtures 1015.2, Table 1009.1
    ASME A112.18.1-
    2018/CSA B125.1-2018    		 Plumbing Supply Fittings Fittings 408.4, 417.1, 417.2,
    417.3, 417.4, 417.6,
    603.5.20
    ASME A112.18.2-
    2020/CSA B125.2-2020    		 Plumbing Waste Fittings Fittings 404.1, 408.5
    ASME A112.18.3-2002
    (R2017)    		 Backflow Protection Devices and Systems in Plumbing Fixture
    Fittings    		 Backflow Protection 417.3, 417.4
    ASME A112.18.6-2017/
    CSA B125.
  • CPC § 37-2020 High relevance — show source text

    37-2020|Pressurized Flushing Devices for Plumbing Fixtures|Backflow Protection|413.2| |ASSE 1070-2020/ASME
    A112.1070-2020/CSA
    B125.70-2020|Water Temperature Limiting Devices|Valves|407.3(1), 409.4(1),
    410.3(1), 417.7(1),
    417.8| |ASME B1.20.1-2013
    (R2018)|Pipe Threads, General Purpose (Inch)|Joints|605.1.5, 605.2.3,
    605.5.2, 605.12.3,
    705.1.3, 705.3.4,
    705.4.2, 705.6.3,
    1208.5.8, 1322.5(2)| |ASME B16.1-2020|Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125,
    and 250|Fittings|1208.5.11.1|

    336 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
    ASME B16.3-2021 Malleable Iron Threaded Fittings: Classes 150 and 300 Fittings Table 604.1,
    Table 701.2
    ASME B16.4-2021 Gray Iron Threaded Fittings: Classes 125 and 250 Fittings Table 604.1
    ASME B16.5-2020 Pipe Flanges and Flanged Fittings: NPS1⁄2 through NPS 24
    Metric/Inch    		 Fittings 1208.5.11.2(1)
    ASME B16.12-2019 Cast Iron Threaded Drainage Fittings Fittings Table 701.2
    ASME B16.15-2018 Cast Copper Alloy Threaded Fittings: Classes 125 and 250 Fittings Table 604.1
    ASME B16.18-2018 Cast Copper Alloy Solder Joint Pressure Fittings Fittings Table 604.1
    ASME B16.20-2017 Metallic Gaskets for Pipe Flanges Joints 1208.5.12.2
    ASME B16.21-2021 Nonmetallic Flat Gaskets for Pipe Flanges Joints 1208.5.12.3
    ASME B16.22-2018 Wrought Copper and Copper Alloy Solder-Joint Pressure Fit-
    tings    		 Fittings Table 604.1, 1321.1
    ASME B16.23-2016 Cast Copper Alloy Solder Joint Drainage Fittings: DWV Fittings Table 701.2
    ASME B16.24-2016 Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves:
    Classes 150, 300, 600, 900, 1500, and 2500    		 Fittings 1208.5.11.3
    ASME B16.
  • CPC § 1501.7 High relevance — show source text

    Residential,
    and Commercial Use|Water Quality|1501.7, 1506.8,
    1506.10.2, 1603.4| |IAPMO IGC 325-2016|Oil/Water Separators Performance|Interceptors|Table 1009.1| |IAPMO PS 53-2020|Grooved Mechanical Pipe Couplings and Grooved Fittings|Fittings|Table 604.1| |IAPMO PS 65-2019a|Airgap Units for Water Conditioning Equipment Installation|Backflow Protection|611.2| |IAPMO PS 66-2015|Dielectric Fittings|Fittings|605.15, 605.16.1,
    605.16.3| |IAPMO PS 72-2019|Valves with Atmospheric Vacuum Breakers|Valves|603.5.6(5)| |IAPMO PS 76-2021|Trap Primers for Fill Valves and Flushometer Valves|DWV Components|1007.2| |IAPMO PS 80-2019|Clarifiers|Interceptors|Table 1009.1| |IAPMO PS 90-2014|Elastomeric Test Caps, Cleanout Caps, and Combination Test
    Caps/Shielded Couplings|DWV Components|Table 707.2| |IAPMO PS 104-2019|Pressure Relief Connection for Dispensing Equipment|Valves|603.5.22(1)| |IAPMO PS 106-2015el|Tileable Shower Receptors and Shower Kits|Fixtures|408.2| |IAPMO PS 117-2021|Press Connections|Fittings|Table 604.1| |CSA B45.5-2017/IAPMO
    Z124-2017|Plastic Plumbing Fixtures (with Errata dated August 2017)|Fixtures|407.1, 408.1, 409.1,
    411.1, 412.1, 420.1| |IAPMO/ANSI Z124.5-
    2013e1 (R2018)|Plastic Toilet Seats|Appurtenance|411.3| |CSA B45.11-2017/IAPMO
    Z401-2017 (R2021)|Glass Plumbing Fixtures|Fixtures|407.1| |CSA B45.12-2013/IAPMO
    Z402-2013 (R2018)|Aluminum and Copper Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
    420.1| |CSA B45.8-2018/IAPMO
    Z403-2018|Terrazzo, Concrete, Composite Stone, and Natural Stone
    Plumbing Fixtures|Fixtures|407.1, 420.1|

    348 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
    IAPMO/ANSI Z601-2018 Scale Reduction Devices Water Conditioning,
    Water Treatment    		 611.1.2
    ANSI/CAN/IAPMO Z1001-
    2021    		 Prefabricated Gravity Grease Interceptors Fixtures Table 1009.1, 1014.1,
  • CPC § 409.6.1 High relevance — show source text

    1, 409.6.1| |ASME A112.19.12-2014
    (R2019)|Wall Mounted, Pedestal Mounted, Adjustable, Elevating, Tilt-
    ing, and Pivoting Lavatory, Sink, and Shampoo Bowl Carrier
    Systems and Drain Waste Systems|Fixtures|407.1, 420.1| |ASME A112.19.14-2013
    (R2018)|Six-Liter Water Closets Equipped with a Dual Flushing Device|Fixtures|411.2.1| |ASME A112.19.15-2012
    (R2017)|Bathtubs/Whirlpool Bathtubs with Pressure Sealed Doors|Fixtures|409.1| |ASME A112.19.19-2016
    (R2021)|Vitreous China Nonwater Urinals|Fixtures|412.1, 412.1.2| |ASSE 1002-2020/ASME
    A112.1002-2020/CSA
    B125.12-2020|Anti-Siphon Fill Valves for Water Closet Tanks|Backflow Protection|413.3, Table 603.2| |ASME A112.36.2M-1991
    (R2017)|Cleanouts|DWV Components|Table 707.2, 707.4.1| |ASSE 1016-2017/ASME
    A112.1016-2017/CSA
    B125.16-2017|Automatic Compensating Valves for Individual Showers and
    Tub/Shower Combinations|Valves|408.4, 408.4.2(1)| |ASSE 1037-2020/ASME
    A112.1037-2020/CSA
    B125.37-2020|Pressurized Flushing Devices for Plumbing Fixtures|Backflow Protection|413.2| |ASSE 1070-2020/ASME
    A112.1070-2020/CSA
    B125.70-2020|Water Temperature Limiting Devices|Valves|407.3(1), 409.4(1),
    410.3(1), 417.7(1),
    417.8| |ASME B1.20.1-2013
    (R2018)|Pipe Threads, General Purpose (Inch)|Joints|605.1.5, 605.2.3,
    605.5.2, 605.12.3,
    705.1.3, 705.3.4,
    705.4.2, 705.6.3,
    1208.5.8, 1322.5(2)| |ASME B16.1-2020|Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125,
    and 250|Fittings|1208.5.11.1|

    336 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
    ASME B16.3-2021 Malleable Iron Threaded Fittings: Classes 150 and 300 Fittings Table 604.1,
    Table 701.
  • CPC § 2-2020 High relevance — show source text

    2-2020|Plumbing Waste Fittings|Fittings|404.1, 408.5| |CSA B125.3-2018|Plumbing Fittings|Fittings|409.4(1), 410.3(1)| |CSA B125.5-2011/IAPMO
    Z600-2011 (R2016)|Flexible Water Connectors with Excess Flow Shut-off Device|Miscellaneous|604.5| |ASME A112.18.6-
    2017/CSA B125.6-2017
    (R2021)|Flexible Water Connectors|Piping|604.5, 604.13| |ASSE 1002-2020/ASME
    A112.1002-2020/CSA
    B125.12-2020|Anti-Siphon Fill Valves for Water Closet Tanks|Backflow Protection|413.3, Table 603.2| |ASME A112.4.14-
    2017/CSA B125.14-2017|Manually Operated Valves for Use in Plumbing Systems|Valves|606.1| |ASSE 1016-2017/ASME
    A112.1016-2017/CSA
    B125.16-2017|Automatic Compensating Valves for Individual Showers and
    Tub/Shower Combinations|Valves|408.4, 408.4.2(1)| |ASSE 1037-2020/ASME
    A112.1037-2020/CSA
    B125.37-2020|Pressurized Flushing Devices for Plumbing Fixtures|Backflow Protection|413.2| |ASSE 1070-2020/ASME
    A112.1070-2020/CSA
    B125.70-2020|Water Temperature Limiting Devices|Valves|407.3(1), 409.4(1),
    410.3(1), 417.7(1),
    417.8| |CSA B137.1-2020|Polyethylene (PE) Pipe, Tubing, and Fittings for Cold-Water
    Pressure Services|Piping|Table 604.1| |CSA B137.5-2020|Crosslinked Polyethylene (PEX) Tubing Systems for Pressure
    Applications|Piping|Table 604.1| |CSA B137.6-2020|Chlorinated Polyvinylchloride (CPVC) Pipe, Tubing, and Fit-
    tings for Hot- and Cold-Water Distribution Systems (with
    Update No. 1)|Piping, Fittings|Table 604.1| |CSA B137.9-2020|Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite
    Pressure-Pipe Systems|Piping|Table 604.1|

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    REFERENCED STANDARDS

    TABLE 1701.1 (continued) REFERENCED STANDARDS

    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    CSA B137.10-2020 Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene
    (PEX-AL-PEX) Composite Pressure-Pipe Systems    		 Piping Table 604.1
    CSA B137.
  • CPC § 701.2. High relevance — show source text

    (a) [HCD 1 & HCD 2] ABS and PVC installations are limited to not more than two stories of areas of res- idential accommodation.

    (b) [OSHPD 1, 2, 3, 4 & 5] ABS and PVC installations are not allowed.

    (3) No vitrified clay pipe or fittings shall be used aboveground or where pressurized by a pump or ejector. They shall be kept not less than 12 inches (305 mm) belowground.

    (4) Copper or copper alloy tube for drainage and vent piping shall have a weight of not less than that of copper or copper alloy drainage tube type DWV.

    (5) Stainless steel 304 pipe and fittings shall not be installed underground and shall be kept not less than 6 inches (152 mm) aboveground.

    (6) Cast-iron soil pipe and fittings and the stainless steel couplings used to join these products shall be listed and tested in accordance with standards referenced in Table 701.2. Such pipe and fittings shall be marked with the country of origin, manufacturer’s name or registered trademark as defined in the product standards, the third party certifier’s mark, and the class of the pipe or fitting. 701.3 Drainage Fittings. Materials for drainage fittings shall comply with the applicable standards referenced in Table 701.2 of the same diameter as the piping served, and such fittings shall be compatible with the type of pipe used.

    701.3.1 Screwed Pipe. Fittings on screwed pipe shall be of the recessed drainage type. Burred ends shall be reamed to the full bore of the pipe. 701.3.2 Threads. The threads of drainage fittings shall be tapped to allow [1] ⁄ 4 inch per foot (20.8 mm/m) grade. 701.3.3 Type. Fittings used for drainage shall be of the drainage type, have a smooth interior water-way, and be constructed to allow [1] ⁄ 4 inch per foot (20.8 mm/m) grade.

    701.4 Continuous Wastes. Continuous wastes and fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping, provided, however, that such connections where exposed or accessible shall be permitted to be of seamless drawn brass not less than No. 20 B & S Gauge (0.032 inches) (0.8 mm). 701.5 Lead. (See Chapter 17) Sheet lead shall comply with the following:

    (1) For safe pans – not less than 4 pounds per square foot (lb/ft [2] ) (19 kg/m [2] ) or [1] ⁄ 16 of an inch (1.6 mm) thick. (2) For flashings or vent terminals – not less than 3 lb/ft [2] (15 kg/m [2] ) or 0.0472 of an inch (1.2 mm) thick. (3) Lead bends and lead traps shall be not less than [1] ⁄ 8 of an inch (3.2 mm) in wall thickness. 701.6 Caulking Ferrules. Caulking ferrules shall be manufactured from copper or copper alloy and shall be in accordance with Table 701.6.

    701.7 Soldering Bushings. Soldering bushings shall be of copper or copper alloy and shall be in accordance with Table 701.7.

    TABLE 701.6

    CAULKING FERRULES

  • CPC § 705.10 High relevance — show source text

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

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    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 § 1701.2 High relevance — show source text

    1|X|X|X|X||||X||X|X|X|X|X|X|||||||||| |Table 1701.2||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.

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    CHAPTER 17

    REFERENCED STANDARDS

    1701.0 General.

    1701.1 Standards. The standards listed in Table 1701.1 are

    referenced in various sections of this code and shall be con sidered part of the requirements of this document. The standards are listed herein by the standard number and effective

    date, the title, application and the section(s) of this code that references the standard. The application of the referenced standard(s) shall be as specified in Section 301.2.2. The promulgating agency acronyms referred to in Table 1701.1 are defined in a list found at the end of the tables.

    TABLE 1701.1

    Col1 REFERENCED STANDARDS Col3 Col4
    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    AAMI AAMI AAMI AAMI
    ANSI/AAMI/ISO 23500-2 Preparation and Quality Management of Fluids for
    Haemodialysis and Related Therapies—Part 2: Water Treat-
    ment Equipment for Hemodialysis Applications    		 Miscellaneous 614.7
    ANSI/AAMI/ISO 23500-3 Preparation and Quality Management of Fluids for
    Haemodialysis and Related Therapies—Part 3: Water for
    Haemodialysis and Related Therapies.    		 Miscellaneous 614.7
    ARCSA ARCSA ARCSA ARCSA
    ARCSA/ASPE/ANSI 63-
    2020    		 Rainwater Catchment Systems Miscellaneous 1602.1
    ASME ASME ASME ASME
    ASME A112.1.2-2012
    (R2017)    		 Air Gaps in Plumbing Systems (For Plumbing Fixtures and
    Water-Connected Receptors)    		 Fittings Table 603.2
    ASME A112.1.3-2000
    (R2019)    		 Air Gap Fittings for Use with Plumbing Fixtures, Appliances,
    and Appurtenances    		 Fittings Table 603.2
    ASME A112.3.1-2007
    (R2017)    		 Stainless Steel Drainage Systems for Sanitary DWV, Storm,
    and Vacuum Applications,
  • CPC § 301.2 High relevance — show source text

    301.2 Minimum Standards. Pipe, pipe fittings, traps, fixtures, material, and devices used in a plumbing system shall be listed (third-party certified) by a listing agency (accredited conformity assessment body) as complying with the approved applicable recognized standards referenced in this code, and shall be free from defects. Unless otherwise provided for in this code, materials, fixtures, or devices used or entering into the construction of plumbing systems, or parts thereof shall be submitted to the Authority Having Jurisdiction for approval prior to being installed. 301.2.1 Marking. Each length of pipe and each pipe fitting, trap, fixture, material, and device used in a plumbing system shall have cast, stamped, or indelibly marked on it any markings required by the applicable referenced standards and listing agency, and the manufacturer’s mark or name, which shall readily identify the manufacturer to the end user of the product. Where required by the approved standard that applies, the product shall be marked with the weight and the quality of the product. Materials and devices used or entering into the construction of plumbing and drainage systems, or parts thereof shall be marked and identified in a manner satisfactory to the Authority Having Jurisdiction. Such marking shall be done by the manufacturer. Field markings shall not be acceptable.

    Exception: Markings shall not be required on nipples created from cutting and threading of approved pipe.

    301.2.2 Standards. Standards listed or referred to in this chapter or other chapters cover materials that will conform to the requirements of this code, where used in accordance with the limitations imposed in this or other chapters thereof and their listing. Where a standard covers materials of various grades, weights, quality, or configurations, the portion of the listed standard that is applicable shall be used. Design and materials for special conditions or materials not provided for herein shall be permitted to be used by special permission of the Authority Having Jurisdiction after the Authority Having Jurisdiction has been satisfied as to their adequacy. A list of plumbing standards that appear in specific sections of this code is referenced in Table 1701.1. Standards referenced in Table 1701.1 shall be applied as indicated in the applicable referenced section. A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections of this code appear in Table 1701.2. An IAPMO Installation Standard is referenced in Appendix I for the convenience of the users of this code. It is not considered as a part of this code unless formally adopted as such by the Authority Having Jurisdiction.

    301.2.3 Plastic Pipe, Plastic Pipe Fittings, and Components. Plastic pipe, plastic pipe fittings, and components other than those for gas shall comply with NSF/ANSI 14.

    301.2.4 Cast-Iron Soil Pipe, Fittings, and Hubless Couplings. Cast-iron soil pipe, fittings, and hubless couplings shall be third party certified in accordance with ASTM C1277 and CISPI 310 for couplings and ASTM A888, ASTM A74, and CISPI 301 for pipes and fittings. 301.2.5 Existing Buildings. In existing buildings or premises in which plumbing installations are to be altered, repaired, or renovated, the Authority Having Jurisdiction has discretionary powers to permit deviation from the provisions of this code, provided that such proposal to deviate is first submitted for proper determination in order that health and safety requirements, as they pertain to plumbing, shall be observed.

  • CPC § 408.1 High relevance — show source text

    1, 408.1, 409.1,
    411.1, 412.1, 420.1| |IAPMO/ANSI Z124.5-
    2013e1 (R2018)|Plastic Toilet Seats|Appurtenance|411.3| |CSA B45.11-2017/IAPMO
    Z401-2017 (R2021)|Glass Plumbing Fixtures|Fixtures|407.1| |CSA B45.12-2013/IAPMO
    Z402-2013 (R2018)|Aluminum and Copper Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
    420.1| |CSA B45.8-2018/IAPMO
    Z403-2018|Terrazzo, Concrete, Composite Stone, and Natural Stone
    Plumbing Fixtures|Fixtures|407.1, 420.1|

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    REFERENCED STANDARDS

    TABLE 1701.1 (continued) REFERENCED STANDARDS

    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    IAPMO/ANSI Z601-2018 Scale Reduction Devices Water Conditioning,
    Water Treatment    		 611.1.2
    ANSI/CAN/IAPMO Z1001-
    2021    		 Prefabricated Gravity Grease Interceptors Fixtures Table 1009.1, 1014.1,
    1014.3.4
    IAPMO/ANSI Z1002-2020 Rainwater Harvesting Tanks Rainwater Tanks 1603.5
    IAPMO/ANSI Z1033-2015
    (R2020)
    		 Flexible PVC Hoses and Tubing for Pools, Hot Tubs, Spas, and
    Jetted Bathtubs
    		 Tubing 409.6.2
    IAPMO/ANSI Z1088-2019e1 Pre-Pressurized Water Expansion Tanks Miscellaneous 608.3
    IAPMO/ANSI Z1157-
    2014e1 (R2019)    		 Ball Valves Valves 606.1
    ANSI/CAN/IAPMO Z1349-
    2021    		 Devices for Detection, Monitoring or Control of Plumbing
    Systems    		 Leak Detection 606.9
    CSA B125.5-2011/IAPMO
    Z600-2011 (R2016)    		 Flexible Water Connectors with Excess Flow Shut-off Device Miscellaneous 604.5
    ICC ICC ICC ICC
    ICC A117.1-2017 Accessible and Usable Buildings and Facilities Miscellaneous 403.2
    ISEA ISEA ISEA ISEA
    ISEA Z358.1-2014 Emergency Eyewash and Shower Equipment Miscellaneous 416.1, 416.2
    MSS MSS MSS MSS
    MSS SP-58-2018 Pipe Hangers and Supports – Materials, Design, Manufacture,
    Selection, Application, and Installation    		 Miscellaneous 1210.3.5, 1323.4.
  • CPC § 312.0 High relevance — show source text

    312.0 Protection of Piping, Materials, and Structures

    314.0 Trenching, Excavation, and Backfill

    701.3 Drainage Fittings

    705.5.1.1 Butt Fusion Joints

    705.5.1.2 Electro-Fusion Joints

    705.5.1.3 Socket-Fusion Joints

    723.0 Building Sewer Test

    TABLE 1

    CLEANOUTS (See Section 4.6.1)

    The following standards from Tables 1701.1 and 1701.2 of the 2024 Uniform Plumbing Code apply.

    Table 1701.1 Standards

    ASTM D2239 Polyethylene (PE) Plastic Pipe (SIDRPR) Based on Controlled Inside Diameter

    ASTM D2683 Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing

    ASTM D3261 Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing

    ASTM F714 Polyethylene (PE) Plastic Pipe (DRPR) Based on Outside Diameter

    ASTM F894 Polyethylene (PE) Large Diameter Profile Wall Sewer and Drain Pipe

    ASTM F1055 Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing

    ASTM F2620 Heat Fusion Joining of Polyethylene Pipe and Fittings

    Table 1701.2 Standards

    ASTM D2657 Heat Fusion Joining of Polyolefin Pipe and Fittings

    IAPMO PS 25 Metallic Fittings for Joining Polyethylene Pipe for Water Service and Yard Piping

    Note: For SI units: 1 inch = 25 mm

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    "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

  • CPC § 101.4 High relevance — show source text

    [A] 101.4 Referenced codes. The other codes specified in Sections 101.4.1 through 101.4.7 and referenced elsewhere in this code shall be considered to be part of the requirements of this code to the prescribed extent of each such reference.

    [A] 101.4.1 Gas. The provisions of the California Plumbing Code and/or the California Mechanical Code shall apply to the installation of gas piping from the point of delivery, gas appliances and related accessories as covered in this code. These requirements apply to gas piping systems extending from the point of delivery to the inlet connections of appliances and the installation and operation of residential and commercial gas appliances and related accessories.

    [A] 101.4.2 Mechanical. The provisions of the California Mechanical Code shall apply to the installation, alterations, repairs and replacement of mechanical systems, including equipment, appliances, fixtures, fittings and appurtenances, including ventilating, heating, cooling, air-conditioning and refrigeration systems, incinerators and other energy-related systems.

    [A] 101.4.3 Plumbing. The provisions of the California Plumbing Code shall apply to the installation, alteration, repair and replacement of plumbing systems, including equipment, appliances, fixtures, fittings and appurtenances, and where connected to a water or sewage system and all aspects of a medical gas system. The provisions of the California Plumbing Code shall apply to private sewage disposal systems.

    [A] 101.4.4 Property maintenance. The provisions of the California Existing Building Code shall apply to existing structures and premises; equipment and facilities; light, ventilation, space heating, sanitation, life and fire safety hazards; responsibilities of owners, operators and occupants; and occupancy of existing premises and structures.

    [A] 101.4.5 Fire prevention. The provisions of the California Fire Code shall apply to matters affecting or relating to structures, processes and premises from the hazard of fire and explosion arising from the storage, handling or use of structures, materials or devices; from conditions hazardous to life, property or public welfare in the occupancy of structures or premises; and from the construction, extension, repair, alteration or removal of fire suppression, automatic sprinkler systems and alarm systems or fire hazards in the structure or on the premises from occupancy or operation.

    [A] 101.4.6 Energy. The provisions of the California Energy Code shall apply to all matters governing the design and construction of buildings for energy efficiency.

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    ADMINISTRATION

    [A] 101.4.7 Existing buildings. The provisions of the California Existing Building Code shall apply to matters governing the repair, alteration, change of occupancy, addition to and relocation of existing buildings.

    [OSHPD 1] The provisions of Chapters 2, 3A, 4A and 5A of the California Existing Building Code shall apply to all matters governing the repairs, alterations, change of occupancy, additions and relocation of existing structures and portions thereof under OSHPD jurisdic- tion. All references to Chapters 3, 4 and 5 of the California Existing Building Code shall be replaced by equivalent provisions in Chapters 3A, 4A and 5A.

  • CPC § 101.5 Medium relevance — show source text

    101.5 Referenced codes and standards. The codes and standards referenced elsewhere in this code shall be considered part of the requirements of this code to the prescribed extent of each such reference.

    101.5.1 Building. The provisions of the California Building Code, California Residential Code and California Existing Building Code, as applicable, shall apply to the construction, alteration, movement, enlargement, replacement, repair, use and occupancy, location, maintenance, removal and demolition of every structure or any appurtenances connected or attached to such buildings or structures.

    101.5.2 Electrical. The provisions of the California Electrical Code shall apply to the installation of electrical systems, including but not limited to, alterations, repair, replacement, equipment, appliances, fixtures, fittings and appurtenances thereto.

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    ADMINISTRATION

    101.5.3 Mechanical. The provisions of the California Mechanical Code shall apply to the installation, alterations, repair and replacement of mechanical systems, including equipment, appliances, fixtures, fittings and/or appurtenances, including ventilating, heating, cooling, air-conditioning and refrigeration systems, incinerators and other energy-related systems.

    101.5.4 Plumbing. The provisions of the California Plumbing Code shall apply to the installation, alteration, repair and replacement of plumbing systems, including equipment, appliances, fixtures, fittings and appurtenances where connected to a water or sewage system.

    101.5.5 Fire prevention. The provisions of CCR, Title 19, Division 1 and CCR, Title 24, Part 2 and Part 9 relating to fire and panic safety as adopted by the Office of the State Fire Marshal shall apply to all structures, processes and premises for protection from the hazard of fire, panic and explosion.

    101.5.6 Energy. The provisions of the California Energy Code shall apply to the minimum design and construction of buildings for energy efficiency.

    101.6 Order of precedence and use.

    101.6.1 Differences. In the event of any differences between these building standards and the standard reference documents, the text of these building standards shall govern. In the event a local amendment to this code results in differences between these building standards and the amendment, the text of the amendment shall govern.

    101.6.2 Specific provision. Where a specific provision varies from a general provision, the specific provision shall apply.

    101.6.3 Conflicts. When the requirements of this code conflict with the requirements of any other part of the California Building Standards Code, Title 24, the most restrictive requirement shall prevail.

    101.6.4 Explanatory notes. Explanatory material, such as references to websites or other sources where additional information may be found, is included in this code in the form of notes. Notes are informational only and are not enforceable requirements of this code.

    101.7 City, county, or city and county amendments, additions or deletions. This code is intended to set mandatory minimum Green Building Standards and includes optional tiers that may, at the discretion of any city, county, or city and county, be applied.

  • CPC § 603.5.17 Medium relevance — show source text

    603.5.17 Potable Water Outlets and Valves. Potable water outlets, freeze-proof yard hydrants, combination stop-and-waste valves, or other fixtures that incorporate a stop and waste feature that drains into the ground shall not be installed underground. 603.5.18 Pure Water Process Systems. The water supply to a pure water process system, such as dialysis water systems, semiconductor washing systems, and similar process piping systems, shall be protected from backpressure and backsiphonage by a reduced-pressure principle backflow preventer. 603.5.18.1 Dialysis Water Systems. The individual connections of the dialysis related equipment to the dialysis pure water system shall not require additional backflow protection. 603.5.19 Garbage Can Washers. Where garbage can washers are connected to a potable water supply system, the connection shall be protected against backflow in accordance with Table 603.2.

    603.5.20 Plumbing Fixture Fittings. Plumbing fixture fittings with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1. 603.5.21 Swimming Pools, Spas, and Hot Tubs. Potable water supply to swimming pools, spas, and hot tubs shall be protected by an air gap or a reduced pressure principle backflow preventer in accordance with the following:

    (1) The unit is equipped with a submerged fill line.

    (2) The potable water supply is directly connected to the unit circulation system. 603.5.22 Chemical Dispensers. The water supply to chemical dispensers shall be protected against backflow by one of the following:

    (1) The chemical dispenser shall comply with ANSI/CAN/ASSE/IAPMO 1055. Where an installation involves a water source coming from a faucet with an integrated vacuum breaker device, a pressure bleed device conforming to IAPMO PS 104 shall be used to protect the vacuum breaker device.

    (2) Water supply shall be protected by one of the following methods:

    (a) Air gap

    (b) Atmospheric vacuum breaker (AVB)

    (c) Pressure vacuum breaker backflow prevention assembly (PVB)

    (d) Spill-resistant pressure vacuum breaker (SVB)

    (e) Reduced-pressure principle backflow prevention assembly (RP)

    «

    «

    «

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    WATER SUPPLY AND DISTRIBUTION

    604.0 Materials.

    604.1 Pipe, Tube, and Fittings. Pipe, tube, fittings, solvent cement, thread sealants, solders, and flux used in potable water systems intended to supply drinking water shall comply with NSF/ANSI/CAN 61. Where pipe fittings and valves are made from copper alloys containing more than 15 percent zinc by weight and are used in plastic piping systems, they shall be resistant to dezincification and stress corrosion cracking in compliance with NSF/ANSI 14.

    Materials used in the water supply system, except valves and similar devices, shall be of a like material, except where otherwise approved by the Authority Having Jurisdiction.

    Materials for building water piping and building supply piping shall comply with the applicable standards referenced in Table 604.1.

  • CPC § 1.4 Medium relevance — show source text

    1.4, 705.3.3| |ASTM C4-2004 (R2018)|Standard Specification for Clay Drain Tile and Perforated Clay
    Drain Tile|Piping|Table 1101.4.6| |ASTM C425-2021|Standard Specification for Compression Joints for Vitrified
    Clay Pipe and Fittings|Joints|705.8.1| |ASTM C564-2020a|Standard Specification for Rubber Gaskets for Cast Iron Soil
    Pipe and Fittings|Joints|705.2.2| |ASTM C700-2018|Standard Specification for Vitrified Clay Pipe, Extra Strength,
    Standard Strength, and Perforated|Piping|Table 701.2,
    Table 1101.4.6| |ASTM C1053-2000 (R2015)|Standard Specification for Borosilicate Glass Pipe and Fittings
    for Drain, Waste, and Vent (DWV) Applications|Piping|811.2| |ASTM C1173-2018|Standard Specification for Flexible Transition Couplings for
    Underground Piping Systems|Fittings|705.10| |ASTM C1277-2020|Standard Specification for Shielded Couplings Joining Hubless
    Cast Iron Soil Pipe and Fittings|Fixtures|301.2.4, 705.2.2| |ASTM C1460-2021|Standard Specification for Shielded Transition Couplings for
    Use With Dissimilar DWV Pipe and Fittings Above Ground|Joints|705.10| |ASTM C1461-2021|Standard Specification for Mechanical Couplings Using Ther-
    moplastic Elastomeric (TPE) Gaskets for Joining Drain, 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.
  • 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 § 301.3.1 Medium relevance — show source text

    3
    301.3.1
    301.3.1.1
    301.3.1.2
    301.4.1
    301.7
    301.8
    303.1_Exception_
    304.1_Exception_
    310.11
    310.12
    310.13
    310.14
    310.15
    311.1_ Note_
    312.2
    312.7
    312.11
    313.8
    321.0
    322.0
    323.0
    ||||||||||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.

    2025 CALIFORNIA PLUMBING CODE 47

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

    48 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 3

    GENERAL REGULATIONS

    301.0 General.

    301.1 Applicability. This chapter shall govern the general requirements, not specific to other chapters, for the installation of plumbing systems. 301.2 Minimum Standards. Pipe, pipe fittings, traps, fixtures, material, and devices used in a plumbing system shall be listed (third-party certified) by a listing agency (accredited conformity assessment body) as complying with the approved applicable recognized standards referenced in this code, and shall be free from defects. Unless otherwise provided for in this code, materials, fixtures, or devices used or entering into the construction of plumbing systems, or parts thereof shall be submitted to the Authority Having Jurisdiction for approval prior to being installed. 301.2.1 Marking. Each length of pipe and each pipe fitting, trap, fixture, material, and device used in a plumbing system shall have cast, stamped, or indelibly marked on it any markings required by the applicable referenced standards and listing agency, and the manufacturer’s mark or name, which shall readily identify the manufacturer to the end user of the product. Where required by the approved standard that applies, the product shall be marked with the weight and the quality of the product. Materials and devices used or entering into the construction of plumbing and drainage systems, or parts thereof shall be marked and identified in a manner satisfactory to the Authority Having Jurisdiction. Such marking shall be done by the manufacturer. Field markings shall not be acceptable.

    Exception: Markings shall not be required on nipples created from cutting and threading of approved pipe.

    301.2.2 Standards. Standards listed or referred to in this chapter or other chapters cover materials that will conform to the requirements of this code, where used in accordance with the limitations imposed in this or other chapters thereof and their listing. Where a standard covers materials of various grades, weights, quality, or configurations, the portion of the listed standard that is applicable shall be used.

Frequently asked questions

Which single place in the CPC tells me what standard applies to a given fixture material?

Table 1701.1 is the master mapping; § 1701.1 says the standards in Table 1701.1 are part of the code and list what standard applies to each fixture material/fitting.

Can I install a fixture that meets a different but similar standard?

Only with the AHJ’s approval. The CPC requires products be listed to the applicable referenced standard or otherwise authorized by the AHJ under § 301.2.2.

Do fittings (like faucets and drains) reference different standards than fixture bodies?

Yes. Fixture bodies (ceramic, stainless, etc.) are covered by fixture standards (ASME/CSA B45.x entries in Table 1701.1). Supply fittings and waste fittings are covered by separate ASME A112.18.x / CSA B125.x or other standards; check Table 1701.1 and the specific fixture section (e.g., § 404.1 for waste fittings).

What if a product is not marked with a listing or manufacturer name?

Per § 301.2.1 the product must be marked as required by the referenced standard and listing agency; unmarked products are not acceptable unless the AHJ allows otherwise.

Where do I find the exact text of a referenced standard?

Table 1701.1 lists the standard number and title; obtain the full standard text from the standards organization (ASME, CSA, ASTM, IAPMO, etc.). Table 1701.1 and § 1701.1 tell you which standard to obtain and require compliance.

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