CPC · California Plumbing Code

Which pipe, tubing, and fittings are permitted (including plastic, CSST, and anodeless risers)?

The CPC allows polyethylene (ASTM D2513) and polyamide (ASTM F2945) gas piping, requires corrugated stainless steel tubing (CSST) to be listed to CSA/ANSI LC 1, and permits anodeless risers only when manufacturer‑recommended/ certified and leak‑tested; PVC/CPVC may not be used for fuel gas.

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Last reviewed: July 6, 2026

What the code requires — 2–4 sentences

In plain English: the California Plumbing Code allows certain plastic and metal gas piping materials only when they meet the specific standards and markings listed in the code; PVC/CPVC are expressly prohibited for fuel-gas service. The CPC’s rules for these materials are chiefly in § 1208.5.4 (plastic pipe/tubing/fittings), § 1208.5.6 (anodeless risers), and § 1208.5.3.5 (corrugated stainless steel tubing / CSST) — each section prescribes required standards, manufacturer recommendation/listing, and limitations. § 1208.5.4 , § 1208.5.6 , § 1208.5.3.5 .

The single most important rule: use only materials that the CPC explicitly permits and that are manufactured/listed to the required standards — e.g., PE pipe must be ASTM D2513-marked and CSST must be listed to CSA/ANSI LC 1/CSA 6.26.

Requirements in detail

Plastic pipe, tubing and fittings (short summary)

  • Polyethylene (PE) gas pipe/tubing/fittings are permitted when they conform to ASTM D2513 and the pipe is marked “gas” and “ASTM D2513”. § 1208.5.4 .
  • Polyamide (PA11/PA12) pipe/tubing/fittings are permitted when they conform to ASTM F2945 and are similarly marked. § 1208.5.4 .
  • Polyvinyl chloride (PVC) and chlorinated PVC (CPVC) are not permitted to supply fuel gas. § 1208.5.4 .

Corrugated Stainless Steel Tubing (CSST)

  • Corrugated stainless steel tubing must be listed in accordance with CSA/ANSI LC 1 / CSA 6.26 (i.e., a recognized listing for CSST). § 1208.5.3.5 .
  • Capacity and sizing tables for CSST (and how to use them for design) appear in Chapter 12 tables (Table 1215.2 series) — consult those tables when sizing runs. Tables and notes are included in the CPC (see Table 1215.2 entries).

Anodeless risers (how plastic services may enter buildings)

  • Factory‑assembled anodeless risers must be recommended by the manufacturer for the gas used and leak‑tested by the manufacturer per written procedures. § 1208.5.6.1 (part of § 1208.5.6) .
  • Service head adapters and field‑assembled anodeless risers that use adapters must be recommended by the manufacturer, and design‑certified to meet Category I of ASTM D2513 and 49 CFR 192.281(e); manufacturers must provide qualified installation instructions as required by 49 CFR 192.283(b). § 1208.5.6.2 .
  • Use of plastic pipe/tubing/fittings in undiluted LP‑Gas systems is governed by NFPA 58, i.e., additional restrictions apply when piping pure LP. § 1208.5.6.3 .

Connections / transition details (where they apply)

  • Connections between metallic and plastic piping must be made with transition fittings conforming to ASTM D2513 Category I, ASTM F1973, or ASTM F2509 (see Section 1210.1.7.1). This is important when using PE service pipe + an anodeless riser or service head adapter.

Decision‑relevant summary table

Material / Item Permitted for fuel gas? Required standard / marking Code Reference
Polyethylene (PE) pipe/tubing/fittings Yes (when compliant) Must conform to ASTM D2513 and be marked “gas” and “ASTM D2513” § 1208.5.4
Polyamide (PA11/PA12) pipe/tubing/fittings Yes (when compliant) Must conform to ASTM F2945 and be marked accordingly § 1208.5.4
PVC / CPVC Not permitted for fuel gas N/A — prohibited § 1208.5.4
Corrugated Stainless Steel Tubing (CSST) Yes (when listed) Must be listed to CSA/ANSI LC 1 / CSA 6.26 § 1208.5.3.5
Factory-assembled anodeless riser Permitted (if manufacturer‑recommended & leak‑tested) Manufacturer recommendation + manufacturer leak test per written procedures § 1208.5.6.1
Service head adapters / field-assembled anodeless risers Permitted (with certification) Design‑certified to Category I ASTM D2513 and 49 CFR 192.281(e); manufacturer must provide qualified instructions per 49 CFR 192.283(b) § 1208.5.6.2
Plastic pipe in undiluted LP‑Gas Limited Use per NFPA 58 requirements § 1208.5.6.3

Exceptions & special cases

  • Plastic piping is generally limited to outdoor, underground installation. However, plastic piping may terminate aboveground where an anodeless riser is used, and may terminate with a wall head adapter aboveground where the plastic is inserted into permitted in‑building piping. (See Section 1210.1.7 exceptions.)
  • Where undiluted LP‑Gas is involved, § 1208.5.6.3 defers to NFPA 58 for whether and how plastic piping and fittings may be used. Do not assume the same allowances as for natural gas. § 1208.5.6.3 .
  • Where a manufacturer’s product requires specific installation steps (e.g., bonding/grounding or special fittings for CSST), the CPC requires compliance with the manufacturer’s installation instructions in addition to the listed standard. (An example: CSST systems are installed per manufacturer instructions and must be listed to CSA/ANSI LC 1.) § 1208.5.3.5 .

Common mistakes

  • Assuming any plastic pipe is acceptable for gas service. PVC/CPVC are commonly (and incorrectly) used by mistake — they are prohibited for fuel gas. § 1208.5.4 .
  • Using un‑listed or unlabeled CSST. CSST must be listed to CSA/ANSI LC 1 / CSA 6.26; product listing is not optional. § 1208.5.3.5 .
  • Installing an anodeless riser that is not manufacturer‑recommended or lacks manufacturer leak‑testing documentation. Factory‑assembled risers must be manufacturer‑recommended and leak‑tested. § 1208.5.6.1 .
  • Improper transitions between PE (plastic) and metallic pipe: transitions must use the specified ASTM/ANSI transition fittings (see § 1210.1.7.1 for the acceptable standards). .

Worked example — concrete scenario

Scenario: You are designing / approving a new gas service: a 100 ft underground service will run from the utility supply to the building meter. The service uses polyethylene pipe and will terminate aboveground at a service head.

Step-by-step applying the CPC rules:

  1. Choose PE pipe that is marked “gas” and “ASTM D2513” (this meets the CPC’s requirement for polyethylene fuel‑gas pipe). § 1208.5.4 .
    • Example: 100 ft of 1‑inch PE pipe conforming to ASTM D2513 (manufacturer label visible).
  2. Because the PE is underground and terminates aboveground, use an anodeless riser at the termination — but only a factory‑assembled anodeless riser recommended by the manufacturer and that has been leak‑tested by the manufacturer per written procedure. Obtain the manufacturer’s leak‑test report or certificate for the installed riser. § 1208.5.6.1 .
  3. If the riser uses a service head adapter or the riser is field‑assembled with an adapter, ensure the adapter assembly is design‑certified to Category I of ASTM D2513 and 49 CFR 192.281(e) and that the manufacturer supplies the qualified installation instructions required by 49 CFR 192.283(b). § 1208.5.6.2 .
  4. At the transition from PE to the building’s internal piping (metallic), use an approved transition fitting (for example, an ASTM D2513 Category I transition fitting, or an ASTM F1973 or ASTM F2509 fitting). See Section 1210.1.7.1 for the acceptable transition fittings. .
  5. Do NOT use PVC/CPVC anywhere in this fuel‑gas system. § 1208.5.4 .

This concrete path (100 ft of ASTM D2513 PE + factory anodeless riser + certified adapter + listed transition fitting) follows the CPC requirements cited above.

Related provisions

  • Section on plastic‑to‑metal transition fittings: § 1210.1.7.1 (ASTM D2513 Category I, ASTM F1973, ASTM F2509) .
  • Tables and sizing for CSST (capacity/length tables): Table 1215.2(14) – Table 1215.2(18) (CSST capacity tables) .
  • Additional requirements for plastic piping installation locations and exceptions: § 1210.1.7 (plastic piping to be installed outdoors/underground; exceptions for anodeless riser and wall head adapter) .
  • Manufacturer instructions / listed product requirement for CSST and other tubing: CSA/ANSI LC 1 / CSA 6.26 listing requirement referenced in § 1208.5.3.5 .

Code references

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

  • CPC § 1208.3.1 High relevance — show source text

    TABLE 1208.3.1

    APPROXIMATE GAS INPUT FOR

    TYPICAL APPLIANCES

    [NFPA 54: TABLE A.5.3.2.1]

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    For SI units: 1000 British thermal units per hour = 0.293 kW

    2025 CALIFORNIA PLUMBING CODE 217

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

    FUEL GAS PIPING

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    1208.5.4 Plastic Pipe, Tubing, and Fittings. Polyethylene plastic pipe, tubing, and fittings used to supply fuel gas shall conform to ASTM D2513. Pipe to be used shall be marked “gas” and “ASTM D2513.” Polyamide pipe, tubing, and fittings shall be identified in and conform to ASTM F2945. Pipe to be used shall be marked “gas” and “ASTM F2945.” Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing, and fittings shall not be used to supply fuel gas. [NFPA 54:5.5.4.1.1 – 5.5.4.1.3]

    1208.5.5 Regulator Vent Piping. Plastic pipe and fittings used to connect regulator vents to remote vent terminations shall be PVC (Schedule 40 and 80). PVC vent piping shall not be installed indoors. {NFPA 54:5.5.4.2}

    1208.5.6 Anodeless Risers. Anodeless risers shall

    comply with Section 1208.5.6.1 through Section 1208.5.6.3.

    1208.5.6.1 Factory-Assembled Anodeless Risers. Factory-assembled anodeless risers shall be recommended by the manufacturer for the gas used and shall be leak tested by the manufacturer in accordance with written procedures. [NFPA 54:5.5.4.3(1)]

    1208.5.6.2 Service Head Adapters and Field- Assembled Anodeless Risers. Service head

    adapters and field-assembled anodeless risers incorporating service head adapters shall be recommended by the manufacturer for the gas used and shall be design-certified to meet the requirements of Category I of ASTM D2513 and 49 CFR 192.281(e). The manufacturer shall provide the user qualified installation instructions as prescribed by 49 CFR 192.283(b).

    [NFPA 54:5.5.4.3(2)]

    1208.5.6.3 Undiluted Liquefied Petroleum Gas Piping. The use of plastic pipe, tubing, and fittings in undiluted LP-Gas piping systems shall be in accordance with NFPA 58. [NFPA 54:5.5.4.3(3)]

  • CPC § 1208.5.5 High relevance — show source text

    1208.5.5 Regulator Vent Piping. Plastic pipe and fittings used to connect regulator vents to remote vent terminations shall be PVC (Schedule 40 and 80). PVC vent piping shall not be installed indoors. {NFPA 54:5.5.4.2}

    1208.5.6 Anodeless Risers. Anodeless risers shall

    comply with Section 1208.5.6.1 through Section 1208.5.6.3.

    1208.5.6.1 Factory-Assembled Anodeless Risers. Factory-assembled anodeless risers shall be recommended by the manufacturer for the gas used and shall be leak tested by the manufacturer in accordance with written procedures. [NFPA 54:5.5.4.3(1)]

    1208.5.6.2 Service Head Adapters and Field- Assembled Anodeless Risers. Service head

    adapters and field-assembled anodeless risers incorporating service head adapters shall be recommended by the manufacturer for the gas used and shall be design-certified to meet the requirements of Category I of ASTM D2513 and 49 CFR 192.281(e). The manufacturer shall provide the user qualified installation instructions as prescribed by 49 CFR 192.283(b).

    [NFPA 54:5.5.4.3(2)]

    1208.5.6.3 Undiluted Liquefied Petroleum Gas Piping. The use of plastic pipe, tubing, and fittings in undiluted LP-Gas piping systems shall be in accordance with NFPA 58. [NFPA 54:5.5.4.3(3)]

    1208.5.7 Workmanship and Defects. Gas pipe, tubing, and fittings shall be clear and free from cutting burrs and defects in structure or threading and shall be thoroughly brushed and chip and scale blown. Defects in pipe, tubing, and fittings shall not be repaired. Defective pipe, tubing, and fittings shall be replaced. [NFPA 54:5.5.5]

    1208.5.8 Metallic Pipe Threads. Metallic pipe and fitting threads shall be taper pipe threads and shall comply with ASME B1.20.1. [NFPA 54:5.5.6.1]

    1208.5.8.1 Damaged Threads. Pipe with threads that are stripped, chipped, corroded, or otherwise damaged shall not be used. Where a weld opens during the operation of cutting or threading, that portion of the pipe shall not be used. [NFPA 54:5.5.6.2]

    1208.5.8.2 Number of Threads. Field threading of metallic pipe shall be in accordance with Table 1208.5.8.2. [NFPA 54:5.5.6.3]

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    with the dimensional standards of ASME B36.10M

    and one of the following:

    (1) ASTM A53

    (2) ASTM A106

    (3) ASTM A312 {NFPA 54:5.5.2.2}

    1208.5.2.3 Copper and Copper Alloy Pipe. Copper and copper alloy pipe shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet (scf) of gas (0.7 mg/100 L).

  • CPC § 1701.1 High relevance — show source text

    REFERENCED STANDARDS

    TABLE 1701.1 (continued) REFERENCED STANDARDS

    STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED
    SECTION
    ASTM F1216-2021 Standard Practice for Rehabilitation of Existing Pipelines and
    Conduits by the Inversion and Curing of a Resin-Impregnated
    Tube    		 Piping 715.3.1
    ASTM F1281-2017
    (R2021)e1    		 Standard Specification for Crosslinked Polyethylene/ Alu-
    minum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe    		 Piping Table 604.1
    ASTM F1282-2017 Standard Specification for Polyethylene/Aluminum/Polyethyl-
    ene (PE-AL-PE) Composite Pressure Pipe    		 Piping Table 604.1
    ASTM F1336-2020 Standard Specification for Poly (Vinyl Chloride) (PVC) Gas-
    keted Sewer Fittings    		 Fittings Table 701.2
    ASTM F1412-2016 Standard Specification for Polyolefin Pipe and Fittings for
    Corrosive Waste Drainage Systems    		 Piping 811.2
    ASTM F1488-2014 (R2019) Standard Specification for Coextruded Composite Pipe Piping Table 701.2
    ASTM F1673-2010
    (R2021)e1    		 Standard Specification for Polyvinylidene Fluoride (PVDF)
    Corrosive Waste Drainage Systems    		 Piping 811.2
    ASTM F1760-2016 (R2020) Standard Specification for Coextruded Poly(Vinyl Chloride)
    (PVC) Non-Pressure Plastic Pipe Having Reprocessed
    Recycled Content    		 Piping Table 701.2
    ASTM F1807-2019b Standard Specification for Metal Insert Fittings Utilizing a
    Copper Crimp Ring, or Alternate Stainless Steel Clamps, for
    SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9
    Polyethylene of Raised Temperature (PE-RT) Tubing    		 Fittings Table 604.1
    ASTM F1866-2018 Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic
    Schedule 40 Drainage and DWV Fabricated Fittings    		 Fittings Table 701.2
    ASTM F1960-2021 Standard Specification for Cold Expansion Fittings with PEX
    Reinforcing Rings for Use with Cross-linked Polyethylene
    (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing    		 Fittings Table 604.1
    ASTM F1970-2019 Standard Specification for Special Engineered Fittings,
    Appurtenances or Valves for Use in Poly (Vinyl Chloride) (PVC)
    or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems    		 Piping Table 604.1, 606.1
    ASTM F1973-2013 (R2018) Standard Specification for Factory Assembled Anodeless Risers
    and Tran sition Fittings in Polyethylene (PE) and Polyamide 11
    (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems    		 Fuel Gas 1210.1.7.
  • CPC § 5.5.3.2 High relevance — show source text

    ** Steel tubing shall comply with ASTM A254. [NFPA 54:5.5.3.2] 1308.4.3.2 Stainless Steel Tubing. Stainless steel tubing shall comply with one of the following: (1) ASTM A268 (2) ASTM A269 [NFPA 54:5.5.3.3] 1308.4.3.3 Copper and Copper Alloy Tubing. Copper and copper alloy tubing shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 scf of gas (0.7 mg/100 L). Copper tubing shall comply with standard Type K or Type L of ASTM B88 or ASTM B280. [NFPA 54:5.5.3.4] 1308.4.3.4 Aluminum Alloy Tubing. Aluminum alloy tubing shall comply with ASTM B210 or ASTM B241. Aluminum alloy tubing shall be coated to protect against external corrosion where it is in contact with masonry, plaster, or insulation or is subject to repeated wettings by such liquids as water, detergent, or sewage. Aluminum alloy tubing shall not be used in exterior locations or underground. [NFPA 54:5.5.3.5] 1308.4.3.5 Corrugated Stainless Steel Tubing. Corrugated stainless steel tubing shall be listed in accordance with CSA/ANSI LC 1/CSA 6.26. [NFPA 54:5.5.3.6] 1308.4.4 Plastic Pipe, Tubing, and Fittings. Polyethylene plastic pipe, tubing, and fittings used to supply fuel gas shall conform to ASTM D2513. Pipe to be used shall be marked “gas” and “ASTM D2513.” [NFPA 54:5.5.4.1.1] Polyamide pipe, tubing, and fittings shall be identified in and conform to ASTM F2945. Pipe to be used shall be marked “gas” and “ASTM F2945.” [NFPA 54:5.5.4.1.2] Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing, and fittings shall not be used to supply fuel gas. [NFPA 54:5.5.4.1.3] 1308.4.4.1 Regulator Vent Piping. Plastic pipe and fittings used to connect regulator vents to remote vent terminations shall be PVC (Schedule 40 and 80). PVC vent piping shall not be installed indoors. {NFPA 54:5.5.4.2}

    1308.4.4.2 Anodeless Risers. Anodeless risers shall comply with Section 1308.4.4.2.1 through Section 1308.4.4.2.3.

  • CPC § 701.2 High relevance — show source text

    2| |ASTM F1760-2016 (R2020)|Standard Specification for Coextruded Poly(Vinyl Chloride)
    (PVC) Non-Pressure Plastic Pipe Having Reprocessed
    Recycled Content|Piping|Table 701.2| |ASTM F1807-2019b|Standard Specification for Metal Insert Fittings Utilizing a
    Copper Crimp Ring, or Alternate Stainless Steel Clamps, for
    SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9
    Polyethylene of Raised Temperature (PE-RT) Tubing|Fittings|Table 604.1| |ASTM F1866-2018|Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic
    Schedule 40 Drainage and DWV Fabricated Fittings|Fittings|Table 701.2| |ASTM F1960-2021|Standard Specification for Cold Expansion Fittings with PEX
    Reinforcing Rings for Use with Cross-linked Polyethylene
    (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing|Fittings|Table 604.1| |ASTM F1970-2019|Standard Specification for Special Engineered Fittings,
    Appurtenances or Valves for Use in Poly (Vinyl Chloride) (PVC)
    or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems|Piping|Table 604.1, 606.1| |ASTM F1973-2013 (R2018)|Standard Specification for Factory Assembled Anodeless Risers
    and Tran sition Fittings in Polyethylene (PE) and Polyamide 11
    (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems|Fuel Gas|1210.1.7.1(2)| |ASTM F1974-2009 (R2020)|Standard Specification for Metal Insert Fittings for Polyethylene/
    Aluminum/Polyethylene and Crosslinked Polyethylene/ Alu-
    minum/Crosslinked Polyethylene Composite Pressure Pipe|Fittings|Table 604.1, 605.7.1,
    605.10.1| |ASTM F2080-2019|Standard Specification for Cold-Expansion Fittings with Metal
    Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe
    and SDR9 Polyethylene of Raised Temperature (PE-RT) Pipe|Fittings|Table 604.1| |ASTM F2098-2018|Standard Specification for Stainless Steel Clamps for Securing
    SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9
    Polyethylene of Raised Temperature (PE-RT) to Metal Insert
    and Plastic Insert Fittings|Fittings|Table 604.1| |ASTM F2159-2021|Standard Specification for Plastic Insert Fittings Utilizing a
    Copper Crimp Ring, or Alternate Stainless Steel Clamps for
    SDR9 Crosslinked Polyethylene (PEX) Tubing and SDR9
    Polyethylene of Raised Temperature (PE-RT) Tubing|Fittings|Table 604.1| |ASTM F2389-2021|Standard Specification for Pressure-Rated Polypropylene (PP)
    Piping Systems|Piping|Table 604.1,
    605.11.1, 606.

  • CPC § 5.5.3.5 High relevance — show source text

    [NFPA 54:5.5.3.5] 1308.4.3.5 Corrugated Stainless Steel Tubing. Corrugated stainless steel tubing shall be listed in accordance with CSA/ANSI LC 1/CSA 6.26. [NFPA 54:5.5.3.6] 1308.4.4 Plastic Pipe, Tubing, and Fittings. Polyethylene plastic pipe, tubing, and fittings used to supply fuel gas shall conform to ASTM D2513. Pipe to be used shall be marked “gas” and “ASTM D2513.” [NFPA 54:5.5.4.1.1] Polyamide pipe, tubing, and fittings shall be identified in and conform to ASTM F2945. Pipe to be used shall be marked “gas” and “ASTM F2945.” [NFPA 54:5.5.4.1.2] Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing, and fittings shall not be used to supply fuel gas. [NFPA 54:5.5.4.1.3] 1308.4.4.1 Regulator Vent Piping. Plastic pipe and fittings used to connect regulator vents to remote vent terminations shall be PVC (Schedule 40 and 80). PVC vent piping shall not be installed indoors. {NFPA 54:5.5.4.2}

    1308.4.4.2 Anodeless Risers. Anodeless risers shall comply with Section 1308.4.4.2.1 through Section 1308.4.4.2.3.

    1308.4.4.2.1 Factory-Assembled Anode- less Risers. Factory-assembled anodeless risers shall be recommended by the manufacturer for the gas used and shall be leak-tested by the manufacturer in accordance with written procedures. [NFPA 54:5.5.4.3(1)] 1308.4.4.2.2 Service Head Adapters and Field-Assembled Anodeless Risers. Service head adapters and field assembled anodeless risers incorporating service head adapters shall be recommended by the manufacturer for the gas used and shall be design-certified to meet the

    requirements of Category I of ASTM D2513 and 49 CFR 192.281(e). The manufacturer shall provide the user qualified installation instructions as prescribed by 49 CFR 192.283(b). [NFPA 54:5.5.4.3(2)]

    1308.4.4.2.3 Undiluted Liquefied Petro- leum Gas Piping. The use of plastic pipe, tubing, and fittings in undiluted LP-Gas piping systems shall be in accordance with NFPA 58.

    [NFPA 54:5.5.4.3(3)]

    1308.4.5 Workmanship and Defects. Gas pipe, tubing, and fittings shall be clear and free from cutting burrs and defects in structure or threading and shall be thoroughly brushed and chip and scale blown. Defects in pipe, tubing, and fittings shall not be repaired. Defective pipe, tubing, and fittings shall be replaced. [NFPA 54:5.5.5]

  • CPC § 7.1.6.1 High relevance — show source text

    be designed for the same pressure as the pipe. The conduit shall extend at least 4 inches (102 mm) outside the building, be vented outdoors above finished ground level, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]

    1310.1.6.2 Conduit with Both Ends Terminat- ing Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA 54:7.1.6.2]

    1310.1.7 Connections of Plastic Piping. Plastic piping shall be installed outdoors, underground only.

    Exceptions:

    (1) Plastic piping shall be permitted to terminate aboveground where an anodeless riser is used.

    (2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings.

    [NFPA 54:7.1.7.1]

    1310.1.7.1 Connections Between Metallic and Plastic Piping. Connections made between metallic and plastic piping shall be made with fittings conforming to one of the following:

    (1) ASTM D2513 Category I transition fittings

    (2) ASTM F1973

    (3) ASTM F2509 [NFPA 54:7.1.7.2]

    1310.1.7.2 Tracer Wire. An electrically continuous corrosion-resistant tracer shall be buried with the

    plastic pipe to facilitate locating. The tracer shall be one of the following:

    (1) A product specifically designed for that pur pose.

    (2) Insulated copper conductor not less than 14 AWG.

    Where tracer wire is used, access shall be provided from aboveground or one end of the tracer wire or tape shall be brought aboveground at a building wall or riser. [NFPA 54:7.1.7.3 – 7.1.7.3.2]

    1310.2 CSST Piping Systems. CSST piping systems shall be installed in accordance with this code and the manufac turer’s installation instructions. [NFPA 54:7.1.8]

    1310.3 Installation of Aboveground Piping. Piping installed aboveground shall comply with all of the following:

    (1) Piping shall be securely supported and located where it will be protected from physical damage.

    (2) Where passing through an exterior wall, the piping shall also be protected from corrosion by coating or wrapping with an inert material approved for such applications.

    (3) The piping shall be sealed around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents.

    284 2025 CALIFORNIA MECHANICAL CODE

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

    FUEL GAS PIPING

    (4) Where piping is encased in a protective pipe sleeve, the annular spaces between the gas piping and the sleeve and between the sleeve and the wall opening shall be sealed.

    (5) Piping installed outdoors shall be elevated not less than 3½ inches (89 mm) above the ground.

    (6) Sealing materials shall be compatible with the piping and sleeve. [NFPA 54:7.2.1]

  • CPC § 1210.1.6.1 High relevance — show source text

    1210.1.6.1 Conduit with One End Terminat- ing Outdoors. The conduit shall extend into an accessible portion of the building and, at the point where the conduit terminates in the building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. Where the end sealing is of a type that retains the full pressure of the pipe, the conduit shall be designed for the same pressure as the pipe. The conduit shall extend at least 4 inches (102 mm) outside the building, be vented outdoors above finished ground level, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]

    1210.1.6.2 Conduit with Both Ends Terminat- ing Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA 54:7.1.6.2] 1210.1.7 Connections of Plastic Piping. Plastic piping shall be installed outdoors, underground only.

    Exceptions :

    (1) Plastic piping shall be permitted to terminate aboveground where an anodeless riser is used.

    (2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings.

    [NFPA 54:7.1.7.1]

    1210.1.7.1 Connections Between Metallic and Plastic Piping. Connections made between metallic and plastic piping shall be made with fittings conforming to one of the following:

    224 2025 CALIFORNIA PLUMBING CODE

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

    FUEL GAS PIPING

    (1) ASTM D2513, Category I transition fittings

    (2) ASTM F1973

    (3) ASTM F2509 [NFPA 54:7.1.7.2] 1210.1.7.2 Tracer Wire. An electrically continuous corrosion-resistant tracer shall be buried with the plastic pipe to facilitate locating. The tracer shall be one of the following:

    (1) A product specifically designed for that pur pose.

    (2) Insulated copper conductor not less than 14 AWG.

    Where tracer wire is used, access shall be provided from aboveground, or one end of the tracer wire or tape shall be brought aboveground at a building wall or riser. [NFPA 54:7.1.7.3 – 7.1.7.3.2] 1210.2 CSST Piping Systems. CSST piping systems shall be installed in accordance with this code and the manufacturer’s installation instructions. [NFPA 54:7.1.8]

    1210.3 Installation of Aboveground Piping. Piping installed aboveground shall comply with all of the following:

    (1) Piping shall be securely supported and located where it will be protected from physical damage.

    (2) Where passing through an exterior wall, the piping shall also be protected from corrosion by coating or wrapping with an inert material approved for such applications.

    (3) The piping shall be sealed around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents.

  • CPC § 909.12.4 High relevance — show source text

    [F] 909.12.4 Automatic control. Where completely automatic control is required or used, the automatic-control sequences shall be initiated from an appropriately zoned automatic sprinkler system complying with Section 903.3.1.1, manual controls provided with ready access for the fire department and any smoke detectors required by engineering analysis.

    [F] 909.13 Control air tubing. Control air tubing shall be of sufficient size to meet the required response times. Tubing shall be flushed clean and dry prior to final connections and shall be adequately supported and protected from damage. Tubing passing through concrete or masonry shall be sleeved and protected from abrasion and electrolytic action.

    [F] 909.13.1 Materials. Control-air tubing shall be hard-drawn copper, Type L, ACR in accordance with ASTM B42, ASTM B43, ASTM B68/B68M, ASTM B88, ASTM B251 and ASTM B280. Fittings shall be wrought copper or brass, solder type in accordance with ASME B16.18 or ASME B16.22. Changes in direction shall be made with appropriate tool bends. Brass compression-type fittings shall be used at final connection to devices; other joints shall be brazed using a BCuP-5 brazing alloy with solidus above 1,100°F (593°C) and liquids below 1,500°F (816°C). Brazing flux shall be used on copper-to-brass joints only.

    Exception: Nonmetallic tubing used within control panels and at the final connection to devices provided that all of the following conditions are met:

    1. Tubing shall comply with the requirements of Chapter 6 of the California Mechanical Code .
    2. Tubing and connected devices shall be completely enclosed within a galvanized or paint-grade steel enclosure having a minimum thickness of 0.0296 inch (0.7534 mm) (No. 22 gage). Entry to the enclosure shall be by copper tubing with a protective grommet of neoprene or Teflon or by suitable brass compression to male barbed adapter.
    3. Tubing shall be identified by appropriately documented coding.
    4. Tubing shall be neatly tied and supported within the enclosure. Tubing bridging cabinets and doors or moveable devices shall be of sufficient length to avoid tension and excessive stress. Tubing shall be protected against abrasion. Tubing connected to devices on doors shall be fastened along hinges.

    [F] 909.13.2 Isolation from other functions. Control tubing serving other than smoke control functions shall be isolated by automatic isolation valves or shall be an independent system.

    [F] 909.13.3 Testing. Control air tubing shall be tested at three times the operating pressure for not less than 30 minutes without any noticeable loss in gauge pressure prior to final connection to devices.

    [F] 909.14 Marking and identification. The detection and control systems shall be clearly marked at all junctions, accesses and terminations.

    [F] 909.15 Control diagrams. Identical control diagrams showing all devices in the system and identifying their location and function shall be maintained current and kept on file with the fire code official, the fire department and in the fire command center in a format and manner approved by the fire code official.

  • CPC § 1215.2 Medium relevance — show source text

    Table 1215.2(15) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .251

    Table 1215.2(16) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .252

    Table 1215.2(17) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .253

    Table 1215.2(18) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .254

    Table 1215.2(19) Polyethylene Plastic Pipe . . . . . . .255

    Table 1215.2(20) Polyethylene Plastic Pipe . . . . . . .256

    Table 1215.2(21) Polyethylene Plastic Pipe . . . . . . .257

    Table 1215.2(22) Polyethylene Plastic Tubing . . . . .258

    Table 1215.2(23) Polyethylene Plastic Tubing . . . . .258

    Table 1215.2(24) Schedule 40 Metallic Pipe . . . . . .259

    Table 1215.2(25) Schedule 40 Metallic Pipe . . . . . .260

    Table 1215.2(26) Schedule 40 Metallic Pipe . . . . . .261

    Table 1215.2(27) Schedule 40 Metallic Pipe . . . . . .262

    Table 1215.2(28) Semi-Rigid Copper Tubing . . . . . .263

    Table 1215.2(29) Semi-Rigid Copper Tubing . . . . . .264

    Table 1215.2(30) Semi-Rigid Copper Tubing . . . . . .265

    Table 1215.2(31) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .266

    Table 1215.2(32) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .267

    Table 1215.2(33) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .268

    Table 1215.2(34) Polyethylene Plastic Pipe . . . . . . .269

    Table 1215.2(35) Polyethylene Plastic Pipe . . . . . . .270

    Table 1215.2(36) Polyethylene Plastic Tubing . . . . .271

    CHAPTER 13 HEALTH CARE FACILITIES AND

    MEDICAL GAS AND MEDICAL

    VACUUM SYSTEMS . . . . . . . . . .273

    PART I General Requirements . . . . . . . .275

    1301.0 General Requirements . . . . . . . . .275

    1301.1 Applicability . . . . . . . . . . . . . . . . . .275

    1301.2 Where Not Applicable . . . . . . . . . .275

    1301.3 Conflict of Requirements . . . . . . .275

    1301.4 Where Required . . . . . . . . . . . . . .275

    xl 2025 CALIFORNIA PLUMBING CODE

  • CPC § 1315.2 Medium relevance — show source text

    Table 1315.2(14) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 310

    Table 1315.2(15) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 311

    Table 1315.2(16) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 312

    Table 1315.2(17) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 313

    Table 1315.2(18) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 314

    Table 1315.2(19) Polyethylene Plastic Pipe . . . . . . . 315

    Table 1315.2(20) Polyethylene Plastic Pipe . . . . . . . 216

    Table 1315.2(21) Polyethylene Plastic Pipe . . . . . . . 317

    Table 1315.2(22) Polyethylene Plastic Tubing . . . . . 318

    Table 1315.2(23) Polyethylene Plastic Tubing . . . . . 318

    Table 1315.2(24) Schedule 40 Metallic Pipe . . . . . . 319

    Table 1315.2(25) Schedule 40 Metallic Pipe . . . . . . 320

    Table 1315.2(26) Schedule 40 Metallic Pipe . . . . . . 321

    Table 1315.2(27) Schedule 40 Metallic Pipe . . . . . . 322

    Table 1315.2(28) Semi-Rigid Copper Tubing . . . . . . 323

    Table 1315.2(29) Semi-Rigid Copper Tubing . . . . . . 324

    Table 1315.2(30) Semi-Rigid Copper Tubing . . . . . . 330

    Table 1315.2(31) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 326

    Table 1315.2(32) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 327

    Table 1315.2(33) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 328

    Table 1315.2(34) Polyethylene Plastic Pipe . . . . . . . 329

    Table 1315.2(35) Polyethylene Plastic Pipe . . . . . . . 330

    Table 1315.2(36) Polyethylene Plastic Tubing . . . . . 331

    CHAPTER 14 PROCESS PIPING. . . . . . . . . . . . 333

    1401.0 General. . . . . . . . . . . . . . . . . . . . . 335

    1401.1 Applicability. . . . . . . . . . . . . . . . . . 335

    1402.0 Permit . . . . . . . . . . . . . . . . . . . . . . 335

  • CPC § 192.321 Medium relevance — show source text

    Publication Date: 03/18/2020 Effective Date: 06/18/2020 Rev. 7

    Compliance Requirement / Regulatory Commitment

    Code of Federal Regulations (CFR) Title 49, Transportation, Part 192—Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards, Section 192.321, “Installation of plastic pipe”

    References

    ASTM F1973-08, Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems

    Gas Design Standard A-04, “Cover and Clearance Requirements for Transmission Lines, Distribution Mains, and Service Lines”

    Gas Design Standard A-15, “Code Numbers for Steel Pipe”

    Gas Design Standard A-22, “Stainless Steel Tubing Specification”

    Gas Design Standard A-33.1, “Plastic Gas Lines on Bridge Structures”

    Gas Design Standard A-34, “Piping Design and Test Requirements”

    Gas Design Standard A-42, “Standard Branch Service Installation”

    Gas Design Standard A-44, “Service Connections to Cast Iron Main”

    Gas Design Standard A-70, “Casings for Highway and Railroad Crossings”

    Gas Design Standard A-73, “Casing Insulator and End Seals Selection Chart”

    Gas Design Standard A-75, “Gas Service and Mains in Plastic Casing”

    Gas Design Standard A-90, “Plastic Main and Service Installation”

    Gas Design Standard A-90.2, “Locating Wire Installation for Direct Burial Plastic Mains and Services”

    Gas Design Standard A-90.3, “Locating Wire Installation for Inserted Plastic Mains and Services”

    Gas Design Standard A-91, “Prefabricated Risers”

    Gas Design Standard A-93, “Polyethylene Pipe Specifications and Design Considerations”

    Gas Design Standard A-93.1, “Plastic Gas Distribution System Construction and Maintenance”

    Gas Design Standard A-93.2, “Deactivation of Plastic Services”

    Gas Design Standard A-93.3, “Plastic Excess Flow Valves” Gas Design Standard B-14, “Standard Threaded Tee”

    PG&E Internal Information “PG&E” refers to Pacific Gas and Electric Company, a subsidiary of PG&E Corporation.

    ©2020 Pacific Gas and Electric Company. All rights reserved.

    Page 13 of 17

    Polyethylene Gas Distribution System Design A-90

    Publication Date: 03/18/2020 Effective Date: 06/18/2020 Rev. 7

    References (continued)

    Gas Design Standard B-15.1, “Threaded Bushing”

    Gas Design Standard B-54, “Compression Couplings”

    Gas Design Standard B-62, “Stainless Steel Tube Fittings”

    Gas Design Standard B-90, “Plastic System Socket and Butt Fusion Fittings”

    Gas Design Standard B-90.1, “Plastic System Saddle Fittings”

    Gas Design Standard B-90.2, “Polyethylene (PE) System Accessories”

    Gas Design Standard B-90.3, “Electrofusion Fittings and Tapping Tees”

    Gas Design Standard B-91, “Transition Fittings for Polyethylene Pipe”

    Gas Design Standard B-91.1, “Polyethylene (PE) System Mechanical Fittings”

    Gas Design Standard B-91.4, “Cast Iron to Steel Insulated Transition Couplings”

    Gas Design Standard B-91.5, “Cast Iron to Polyethylene Transition Fittings”

  • CPC § 1210.1.3.8 High relevance — show source text

    1210.1.3.8 Dissimilar Metals. Where dissimilar metals are joined underground, an insulating coupling or fitting shall be used. [NFPA 54:7.1.3.8]

    1210.1.3.9 Steel Risers. Steel risers, other than anodeless risers, connected to plastic piping shall be cathodically protected by means of a welded anode.

    [NFPA 54:7.1.3.9]

    1210.1.4 Protection Against Freezing. Where the formation of hydrates or ice is known to occur, piping shall be protected against freezing. [NFPA 54:7.1.4] 1210.1.5 Piping through Foundation Wall. Piping through a foundation wall shall comply with all of the following:

    (1) Underground piping, where installed through the outer foundation or basement wall of a building, shall be encased in a protective sleeve or protected by an approved device or method.

    (2) The spaces between the gas piping and the sleeve and between the sleeve and the wall shall be sealed to prevent entry of gas and water.

    (3) Sealing materials shall be compatible with the piping and sleeve. [NFPA 54:7.1.5] 1210.1.6 Piping Underground Beneath Buildings. Where gas piping is installed underground beneath buildings, the piping shall be either of the following:

    (1) Encased in an approved conduit designed to withstand the imposed loads and installed in accordance with Section 1210.1.6.1 or Section 1210.1.6.2.

    (2) A piping/encasement system listed for installation beneath buildings. [NFPA 54:7.1.6]

    1210.1.6.1 Conduit with One End Terminat- ing Outdoors. The conduit shall extend into an accessible portion of the building and, at the point where the conduit terminates in the building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. Where the end sealing is of a type that retains the full pressure of the pipe, the conduit shall be designed for the same pressure as the pipe. The conduit shall extend at least 4 inches (102 mm) outside the building, be vented outdoors above finished ground level, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]

    1210.1.6.2 Conduit with Both Ends Terminat- ing Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA 54:7.1.6.2] 1210.1.7 Connections of Plastic Piping. Plastic piping shall be installed outdoors, underground only.

    Exceptions :

    (1) Plastic piping shall be permitted to terminate aboveground where an anodeless riser is used.

    (2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings.

    [NFPA 54:7.1.7.1]

    1210.1.7.1 Connections Between Metallic and Plastic Piping. Connections made between metallic and plastic piping shall be made with fittings conforming to one of the following:

  • CPC § 1310.1.3.9 High relevance — show source text

    1310.1.3.9 Steel Risers. Steel risers, other than anodeless risers, connected to plastic piping shall be cathodically protected by means of a welded anode.

    [NFPA 54:7.1.3.9]

    1310.1.4 Protection Against Freezing. Where the formation of hydrates or ice is known to occur, piping shall be protected against freezing. [NFPA 54:7.1.4]

    1310.1.5 Piping Through Foundation Wall. Piping through a foundation wall shall comply with all of the following:

    (1) Underground piping, where installed through the outer foundation or basement wall of a building, shall be encased in a protective sleeve or protected by an approved device or method.

    (2) The spaces between the gas piping and the sleeve and between the sleeve and the wall shall be sealed to prevent entry of gas and water.

    (3) Sealing materials shall be compatible with the piping and sleeve. [NFPA 54:7.1.5]

    1310.1.6 Piping Underground Beneath Buildings. Where gas piping is installed underground beneath buildings, the piping shall be either of the following:

    (1) Encased in an approved conduit designed to withstand the imposed loads and installed in accordance with Section 1310.1.6.1 or Section 1310.1.6.2.

    (2) A piping/encasement system listed for installation beneath buildings. [NFPA 54:7.1.6]

    1310.1.6.1 Conduit with One End Terminat- ing Outdoors. The conduit shall extend into an accessible portion of the building and, at the point where the conduit terminates in the building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. Where the end sealing is of a type that retains the full pressure of the pipe, the conduit shall

    be designed for the same pressure as the pipe. The conduit shall extend at least 4 inches (102 mm) outside the building, be vented outdoors above finished ground level, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]

    1310.1.6.2 Conduit with Both Ends Terminat- ing Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA 54:7.1.6.2]

    1310.1.7 Connections of Plastic Piping. Plastic piping shall be installed outdoors, underground only.

    Exceptions:

    (1) Plastic piping shall be permitted to terminate aboveground where an anodeless riser is used.

    (2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings.

    [NFPA 54:7.1.7.1]

    1310.1.7.1 Connections Between Metallic and Plastic Piping. Connections made between metallic and plastic piping shall be made with fittings conforming to one of the following:

    (1) ASTM D2513 Category I transition fittings

    (2) ASTM F1973

    (3) ASTM F2509 [NFPA 54:7.1.7.2]

  • CPC § 7.14.1 High relevance — show source text

    [NFPA 54:7.14.1] 1211.7.1 Safety Control. Any essential safety control depending on electric current as the operating medium shall be of a type that shuts off (fail safe) the flow of gas in the event of current failure. [NFPA 54:7.14.2] 1211.8 Earthquake-Actuated Gas Shutoff Valves. Earthquake-actuated gas shutoff valves designed to auto- matically shut off the gas at the location of the valve in the event of a seismic disturbance and certified by the State Architect as conforming to California Code of Regulations, Title 24, Part 12, Chapter 12-16-1, shall be provided for buildings when such installation is required by local ordi- nance. Earthquake-actuated gas shutoff valves which have not been certified by the State Architect shall be prohibited in buildings open to the public under mandatory installation by local ordinance. Installation of the valves shall be in accordance with local ordinance, and in the absence of such per the manufacturer’s installation instructions.

    1212.0 Appliance and Equipment Connections to Building Piping. 1212.1 Connecting Appliances and Equipment. Appliances and equipment shall be connected to the building piping in compliance with Section 1212.6 through Section 1212.8 by one of the following: (1) Rigid metallic pipe and fittings. (2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. (3) A connector for gas appliances listed in accordance with ANSI Z21.24/CSA 6.10. The connector shall be used in

    accordance with the manufacturer’s installation instructions and shall be in the same room as the appliance. Only one connector shall be used per appliance. (4) A connector for outdoor gas appliances and manufactured homes listed in accordance with ANSI Z21.75/CSA 6.27. Only one connector shall be used per appliance. (5) CSST where installed in accordance with the manufacturer’s installation instructions. CSST shall not be directly routed into a metallic appliance enclosure where the appliance is connected to a metallic vent that terminates above a roofline. CSST shall connect only to appliances that are fixed in place. (6) Listed nonmetallic gas hose connectors in accordance with Section 1212.3.

    (7) Unlisted gas hose connectors for use in laboratories and educational facilities in accordance with Section 1212.4.

    [NFPA 54:9.6.1]

    1212.1.1 Protection of Connectors. Connectors and tubing addressed in Section 1212.1(2), Section 1212.1(3), Section 1212.1(4), Section 1212.1(5), and Section 1212.1(6) shall be installed to be protected against physical and thermal damage. Aluminum alloy tubing and connectors shall be coated to protect against external corrosion where they are in contact with masonry, plaster, or insulation or are subject to repeated wettings by such liquids as detergents, sewage, or water other than rainwater. [NFPA 54:9.6.1.1]

    2025 CALIFORNIA PLUMBING CODE 229

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    FUEL GAS PIPING

  • CPC § 604.2.1 Medium relevance — show source text

    604.2.1 Lead Content of Water Supply Pipe and Fittings. Pipes, pipe fittings, valves, and faucets utilized in the water supply system for non-drinking water applications shall have a maximum of 8 percent lead content.

    604.3 Copper or Copper Alloy Tube. Copper or copper alloy tube for water piping shall have a weight of not less than Type L.

    Exception: Type M copper or copper alloy tubing shall be permitted to be used for water piping where piping is aboveground in, or on, a building or underground outside of struc tures.

    604.4 Hard-Drawn Copper or Copper Alloy Tubing. Hard-drawn copper or copper alloy tubing for water supply and distribution in addition to the required incised marking shall be marked in accordance with ASTM B88. The colors shall be: Type K, green; Type L, blue; and Type M, red.

    604.5 Flexible Connectors. Flexible water connectors

    shall be installed in accessible locations, and where under continuous pressure shall comply with ASME A112.18.6/CSA B125.6. Flexible water connectors with an excess flow shut off device shall comply with CSA B125.5/IAPMO Z600.

    604.6 Cast-Iron Fittings. Cast-iron fittings up to and including 2 inches (50 mm) in size, where used in connection with potable water piping, shall be galvanized.

    604.7 Malleable Iron Fittings. Malleable iron water fittings shall be galvanized.

    604.8 Previously Used Piping and Tubing. Piping and tubing that has previously been used for a purpose other than for potable water systems shall not be used.

    604.9 Epoxy Coating. The epoxy coating used on existing, underground steel building supply piping shall comply with NSF/ANSI/CAN 61 and AWWA C210.

    604.10 Plastic Materials. Approved plastic materials shall be permitted to be used in building supply piping, provided that where metal building supply piping is used for electrical grounding purposes, replacement piping, therefore, shall be of like materials.

    2025 CALIFORNIA PLUMBING CODE 147

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

    WATER SUPPLY AND DISTRIBUTION

    TABLE 604.1

    MATERIALS FOR BUILDING SUPPLY AND WATER DISTRIBUTION PIPING AND FITTINGS

    MATERIAL BUILDING SUPPLY
    PIPE AND FITTINGS    		 WATER
    DISTRIBUTION PIPE
    AND FITTINGS    		 REFERENCED
    STANDARD(S) PIPE    		 REFERENCED
    STANDARD(S) FITTINGS
    Copper and Copper
    Alloys    		 X X ASTM B42, ASTM B43,
    ASTM B75, ASTM B88,
    ASTM B135, ASTM B251,
    ASTM B302, ASTM B447    		 ASME B16.15, ASME B16.18,
    ASME B16.22, ASME B16.26,
    ASME B16.502, ASME B16.51,
    ASSE 1061, ASTM F3226,
    AWWA C606, CSA B242,
    IAPMO PS 53, IAPMO PS 117
    CPVC X X ASTM D2846, ASTM F441,
    ASTM F442, CSA B137.
  • CPC § 31-2022 Medium 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 § 1215.2 Medium relevance — show source text

    Table 1215.2(30) Semi-Rigid Copper Tubing . . . . . .265

    Table 1215.2(31) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .266

    Table 1215.2(32) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .267

    Table 1215.2(33) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .268

    Table 1215.2(34) Polyethylene Plastic Pipe . . . . . . .269

    Table 1215.2(35) Polyethylene Plastic Pipe . . . . . . .270

    Table 1215.2(36) Polyethylene Plastic Tubing . . . . .271

    CHAPTER 13 HEALTH CARE FACILITIES AND

    MEDICAL GAS AND MEDICAL

    VACUUM SYSTEMS . . . . . . . . . .273

    PART I General Requirements . . . . . . . .275

    1301.0 General Requirements . . . . . . . . .275

    1301.1 Applicability . . . . . . . . . . . . . . . . . .275

    1301.2 Where Not Applicable . . . . . . . . . .275

    1301.3 Conflict of Requirements . . . . . . .275

    1301.4 Where Required . . . . . . . . . . . . . .275

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    TABLE OF CONTENTS

    1301.5 Existing Systems . . . . . . . . . . . . .275

    1302.0 Design Requirements . . . . . . . . . .275

    1302.1 Risk Categories . . . . . . . . . . . . . .275

    1302.2 Patient Care Spaces . . . . . . . . . .275

    1302.3 Anesthesia . . . . . . . . . . . . . . . . . .275

    1302.4 Wet Procedure Locations . . . . . . .275

    1303.0 Health Care Facilities . . . . . . . . . .275

    1303.1 Drinking Fountain Control Valves . . . . . . . . . . . . . . . . . . . . . .275

    1303.2 Psychiatric Patient Rooms . . . . . .275

    1303.3 Locations for Ice Storage . . . . . . .276

    1303.4 Sterilizers and Bedpan Steamers . . . . . . . . . . . . . . . . . . .276

    1303.5 Aspirators . . . . . . . . . . . . . . . . . . .276

    1303.6 Drains . . . . . . . . . . . . . . . . . . . . . .276

    1303.7 Clinical Sinks . . . . . . . . . . . . . . . .276

    1303.8 Water Supply for Hospitals . . . . . .276

    1303.9 Work Performed in Occupied Healthcare Facilities . . . . . . . . . . .276

  • CPC § 605.6 Medium relevance — show source text

    PE pipe or tubing . . . . . . . . . . . . . . . . . .605.6, 1208.5.4 PE-AL-PE pipe or tubing . . . . . . . . . . . . . . . . . . . .605.7 PE-RT tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .605.8

    570 2025 CALIFORNIA PLUMBING CODE

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    INDEX

    PEX tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .605.9 PEX-AL-PEX pipe or tubing . . . . . . . . . . . . . . . . .605.10 Plastic piping, joints, and fittings . . . . .605.2 – 605.3.2.1,

    605.6 – 605.12.3,

    705.1.1 – 705.1.3,

    705.5 – 705.5.1.3,

    705.6 – 705.6.3,

    705.10.3, 1208.5.10,

    1210.1.7.1

    PP piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .605.11 Prohibited fittings and practices . . . . . . . . . . . . . . . .310.0, 315.2, 604.2,

    1321.8.4, 1321.12.3, 1322.7 PVC piping . . . . . . . . . . . . . . . . .605.12, 705.6, 705.9.4 Screwed joint . . . . . . . . . . . . . . . . . . . . . .310.8, 701.3.1 Slip joint . . . . . . . . . . . . . . . . . . . . . . . . . .221.0, 402.10,

    605.14, 705.9.1, 1003.2 Soldered joint . . . . . . . .212.0, 605.1.4, 705.3.3, A 107.3 Solvent cement plastic pipe . . . . . . . . .605.2.2, 605.3.1,

    605.12.2, 705.1.2,

    705.6.2, 705.9.4 Stainless steel pipe . . . . . . . . . . . . . . .605.13, 605.16.3,

    705.7, 705.10.4

    Threaded joint . . . . . . . . . . . .605.1.5, 605.2.3, 605.5.2,

    605.11.3, 605.12.3, 605.16.1,

    705.1.3, 705.3.4, 705.4.2, 705.6.3,

    705.10.2, 1208.5.8, 1208.5.9.1,

  • CPC § 1315.2 Medium relevance — show source text

    Table 1315.2(27) Schedule 40 Metallic Pipe . . . . . . 322

    Table 1315.2(28) Semi-Rigid Copper Tubing . . . . . . 323

    Table 1315.2(29) Semi-Rigid Copper Tubing . . . . . . 324

    Table 1315.2(30) Semi-Rigid Copper Tubing . . . . . . 330

    Table 1315.2(31) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 326

    Table 1315.2(32) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 327

    Table 1315.2(33) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 328

    Table 1315.2(34) Polyethylene Plastic Pipe . . . . . . . 329

    Table 1315.2(35) Polyethylene Plastic Pipe . . . . . . . 330

    Table 1315.2(36) Polyethylene Plastic Tubing . . . . . 331

    CHAPTER 14 PROCESS PIPING. . . . . . . . . . . . 333

    1401.0 General. . . . . . . . . . . . . . . . . . . . . 335

    1401.1 Applicability. . . . . . . . . . . . . . . . . . 335

    1402.0 Permit . . . . . . . . . . . . . . . . . . . . . . 335

    1402.1 General. . . . . . . . . . . . . . . . . . . . . 335

    1403.0 Plans Required . . . . . . . . . . . . . . . 335

    1403.1 General. . . . . . . . . . . . . . . . . . . . . 335

    1404.0 Workmanship . . . . . . . . . . . . . . . . 335

    1404.1 General. . . . . . . . . . . . . . . . . . . . . 335

    1405.0 Inspections . . . . . . . . . . . . . . . . . . 335

    1405.1 General. . . . . . . . . . . . . . . . . . . . . 335

    1405.2 Required Inspections . . . . . . . . . . 335

    1405.3 Other Inspections . . . . . . . . . . . . . 335

    1406.0 Pipe, Tubing, and Fittings. . . . . . . 335

    1406.1 General. . . . . . . . . . . . . . . . . . . . . 335

    1406.2 Hazardous Process

    Piping (HPP). . . . . . . . . . . . . . . . . 335

    1406.3 Special Requirements for HPP Gases . . . . . . . . . . . . . . . . . . . . . . 336

    CHAPTER 15 SOLAR ENERGY SYSTEMS. . . . 337

  • 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|

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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 § 312.0 Medium 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

    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

  • CPC § 214.0. Medium relevance — show source text

    [HCD 1 & HCD 2] Plastic pipe and fittings joined with solvent cement shall utilize Low VOC primer(s), if a primer is required, and Low VOC solvent cement(s) as defined in Section 214.0. 605.12.3 Threaded Joints. Threads shall comply with ASME B1.20.1. A minimum of Schedule 80 shall be permitted to be threaded; however, the pressure rating shall be reduced by 50 percent. The use of molded fittings shall not result in a 50 percent reduction in the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the PVC components once the thread sealant has been applied. Female PVC threaded fittings shall be used with plastic male threads only. 605.13 Stainless Steel Pipe and Joints. Joining methods for stainless steel pipe and fittings shall be installed in

    152 2025 CALIFORNIA PLUMBING CODE

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

    WATER SUPPLY AND DISTRIBUTION

    accordance with the manufacturer’s installation instructions and shall comply with Section 605.13.1 or Section 605.13.2. 605.13.1 Mechanical Joints. Mechanical joints shall be designed for their intended use. Such joints shall include compression, flanged, grooved, press-connect, and threaded.

    605.13.2 Welded Joints. Welded joints shall be either fusion or resistance welded based on the selection of the base metal. The chemical composition of the filler metal shall comply with AWS A5.9 based on the alloy content of the piping material. 605.14 Slip Joints. In water piping, slip joints shall be permitted to be used only on the exposed fixture supply.

    605.15 Dielectric Unions. Dielectric unions where installed at points of connection where there is a dissimilarity of metals shall be in accordance with ASSE 1079 or IAPMO PS 66.

    [DSA-SS, HCD 1, HCD 2, OSHPD 1, 1R, 2, 3, 4 & 5] Dielectric unions shall be used at all points of connection where there is a dissimilarity of metals.

    605.16 Joints Between Various Materials. Joints

    between various materials shall be installed in accordance

    with the manufacturer’s installation instructions and shall comply with Section 605.16.1 through Section 605.16.3. 605.16.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. Joints from copper or copper alloy pipe or tubing to threaded pipe shall be made using copper alloy adapter, copper alloy nipple [minimum 6 inches (152 mm)], dielectric fitting, or dielectric union in accordance with ASSE 1079 or IAPMO PS 66. The joint between the copper or copper alloy pipe or tubing and the fitting shall be a soldered, brazed, flared, or press-connect joint and the connection between the threaded pipe and the fitting shall be made with a standard pipe size threaded joint. **605.16.2 Plastic Pipe to Other Materials.

  • CPC § 1215.4 Medium relevance — show source text

    1215.4 Sizing of Piping Sections . . . . . . .234

    1215.5 Engineering Methods . . . . . . . . . .235

    1215.6 Variable Gas Pressure . . . . . . . . .235

    Table 1215.2(1) Schedule 40 Metallic Pipe . . . . . .237

    Table 1215.2(2) Schedule 40 Metallic Pipe . . . . . .238

    Table 1215.2(3) Schedule 40 Metallic Pipe . . . . . .239

    Table 1215.2(4) Schedule 40 Metallic Pipe . . . . . .240

    Table 1215.2(5) Schedule 40 Metallic Pipe . . . . . .241

    Table 1215.2(6) Schedule 40 Metallic Pipe . . . . . .242

    Table 1215.2(7) Semi-Rigid Copper Tubing . . . . . .243

    Table 1215.2(8) Semi-Rigid Copper Tubing . . . . . .244

    Table 1215.2(9) Semi-Rigid Copper Tubing . . . . . .245

    Table 1215.2(10) Semi-Rigid Copper Tubing . . . . . .246

    Table 1215.2(11) Semi-Rigid Copper Tubing . . . . . .247

    Table 1215.2(12) Semi-Rigid Copper Tubing . . . . . .248

    Table 1215.2(13) Semi-Rigid Copper Tubing . . . . . .249

    Table 1215.2(14) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .250

    Table 1215.2(15) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .251

    Table 1215.2(16) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .252

    Table 1215.2(17) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .253

    Table 1215.2(18) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . .254

    Table 1215.2(19) Polyethylene Plastic Pipe . . . . . . .255

    Table 1215.2(20) Polyethylene Plastic Pipe . . . . . . .256

    Table 1215.2(21) Polyethylene Plastic Pipe . . . . . . .257

    Table 1215.2(22) Polyethylene Plastic Tubing . . . . .258

    Table 1215.2(23) Polyethylene Plastic Tubing . . . . .258

    Table 1215.2(24) Schedule 40 Metallic Pipe . . . . . .259

    Table 1215.2(25) Schedule 40 Metallic Pipe . . . . . .260

    Table 1215.2(26) Schedule 40 Metallic Pipe . . . . . .261

    Table 1215.2(27) Schedule 40 Metallic Pipe . . . . . .262

    Table 1215.2(28) Semi-Rigid Copper Tubing . . . . . .263

    Table 1215.2(29) Semi-Rigid Copper Tubing . . . . . .264

  • CPC § 5.1 Medium relevance — show source text

    Cleanouts shall be designed to be watertight and gastight.

    5 Testing and Inspection Requirements

    5.1 Media

    The piping of the building sewer shall be tested with water. The Authority Having Jurisdiction shall be permitted to require the removal of cleanouts, etc., to ascertain whether the pressure has reached all parts of the system.

    5.2 Water Test

    The system shall be tested by plugging the end of the building sewer at its points of connection to the public sewer or private sewage disposal system and completely filling the building sewer with water from the lowest to the highest point thereof.

    5.3 Inspections

    The completed piping shall be internally inspected by camera unless waived by the Administrative Authority.

    TABLE 1

    CLEANOUTS (See Section 4.6.1)

    NPS SIZE OF CLEANOUT
    (inches)    		 THREADS PER INCH
    1.5 1.5 11.5


    2    		 1.5 11.5


    2.5    		 2.5 8

    3    		 2.5 8

    4 & larger    		 3.5 8

    Note: For SI units: 1 inch = 25 mm

    Uniform Plumbing Code References

    The following sections of the 2024 Uniform Plumbing Code apply.

    105.2 Required Inspections

    105.2.2 Other Inspections

    105.3 Testing of Systems

    301.2 Minimum Standards

    309.0 Workmanship

    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

    2025 CALIFORNIA PLUMBING CODE 453

Frequently asked questions

Can I use PVC or CPVC for a gas run inside the building?

No. PVC and CPVC are prohibited for supplying fuel gas; the CPC requires PE or other approved materials per § 1208.5.4.

Does CSST need a specific listing?

Yes. Corrugated stainless steel tubing (CSST) must be listed to CSA/ANSI LC 1 / CSA 6.26 before use. § 1208.5.3.5

What must a PE service pipe be marked with?

PE gas pipe must be marked “gas” and “ASTM D2513” (i.e., conform to ASTM D2513). § 1208.5.4

Can I terminate underground plastic pipe inside the building without an anodeless riser?

Plastic piping is generally for outdoor, underground use only; it may terminate aboveground where an anodeless riser is used or when a wall head adapter is used as described in § 1210.1.7 exceptions.

What documentation should I get from the anodeless riser manufacturer?

For factory‑assembled risers: the riser must be recommended by the manufacturer for the gas used and leak‑tested by the manufacturer with written procedures. For service head adapters / field‑assembled risers, require design certification (Category I ASTM D2513 and 49 CFR 192.281(e)) and the qualified installation instructions (49 CFR 192.283(b)). § 1208.5.6.1–.2

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