CPC · California Plumbing Code

What are the requirements for fittings, unions, and service head adapters?

For homeowners: unions (removable joints) are allowed in many water/drain locations but gas‑line unions are limited by a specific CPC section — check §1212.6. Service‑head adapters and anodeless gas risers must either be factory‑assembled and leak‑tested or, if field‑assembled, be design‑certified to ASTM D2513 and 49 CFR requirements and installed following the manufacturer’s instructions. file

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Last reviewed: July 6, 2026

What the code requires — plain English

Unions may be used in drainage, water and (in some locations) fuel‑gas piping — but their use in gas piping is subject to the specific limits of § 1212.6. See § 315.1 for where unions are generally permitted.
Service‑head adapters and anodeless risers for gas (PE) piping must be either factory‑assembled and manufacturer‑leak‑tested (§ 1208.5.6.1) or, if field‑assembled or incorporating service‑head adapters, manufacturer‑recommended and design‑certified to Category I of ASTM D2513 and 49 CFR 192.281(e) with qualified installation instructions provided (§ 1208.5.6.2).

The single most important rule: service‑head adapters and anodeless risers must be manufacturer‑recommended and either factory‑tested or design‑certified to the applicable industry standards (ASTM D2513 / 49 CFR) — do not invent or field‑fabricate a service head without meeting those requirements.

Requirements in detail

Key definitions (bolded on first mention)

Union — an approved mechanical joint intended to be separable for service or removal; allowed in certain locations per § 315.1 and (for gas) as limited by § 1212.6.
Factory‑assembled anodeless riser — an anodeless riser assembled and leak‑tested by the manufacturer and recommended for the gas used (§ 1208.5.6.1).
Service head adapter / field‑assembled anodeless riser — adapters or risers assembled in the field that include service head adapters; must be design‑certified to Category I of ASTM D2513 and 49 CFR 192.281(e) and supplied with qualified installation instructions per 49 CFR 192.283(b) (§ 1208.5.6.2).

What the controlling sections require (short bullets)

§ 1208.5.6.1 (Factory‑assembled anodeless risers): Manufacturer recommendation for the gas used and manufacturer leak testing per written procedures.
§ 1208.5.6.2 (Service‑head adapters & field‑assembled anodeless risers): Manufacturer recommendation for the gas used; design certification to Category I of ASTM D2513 and 49 CFR 192.281(e); manufacturer must provide qualified installation instructions as required by 49 CFR 192.283(b).
§ 315.1 permits approved unions in drainage, water, and — where permitted by § 1212.6 — gas piping (i.e., check § 1212.6 for gas limits).
Dielectric unions (when joining dissimilar metals) must comply with ASSE 1079 or IAPMO PS 66 and are required at dissimilar‑metal connections (see § 605.15 and related joints rules § 605.16).

Decision‑relevant table

Component	Decision / dimension	Required standard or test	Where allowed / important notes	Code Reference
Factory‑assembled anodeless riser	Manufacturer leak‑tested (no numeric dimension)	Manufacturer written leak test procedures	Allowed when recommended by manufacturer for the gas used	§ 1208.5.6.1
Service‑head adapter (field or kit)	Design‑certified to Category I	ASTM D2513 and 49 CFR 192.281(e); provide installation instructions per 49 CFR 192.283(b)	Allowed only when manufacturer‑recommended and design‑certified for the gas used	§ 1208.5.6.2
Union (general)	Accessible location required for drainage/water; gas limited by § 1212.6	Approved type for system; dielectric where metals differ	Drainage: trap or trap seal / between fixture & trap; water: any point; Gas: only as permitted by § 1212.6 — see code	§ 315.1 (and § 1212.6)
Dielectric union	When dissimilar metals are joined	ASSE 1079 or IAPMO PS 66	Required at dissimilar‑metal connections in potable piping and where manufacturer/other sections require	§ 605.15 / § 605.16

Additional related fitting rules that affect selection/installation

Threads for metallic pipe/fittings must be taper pipe threads per ASME B1.20.1; damaged threads are not allowed. Workmanship and defects rules apply: fittings must be free of burrs/defects and defective items replaced.
Plastic gas piping materials and fittings must meet ASTM D2513 (polyethylene) or ASTM F2945 (polyamide); PVC/CPVC are not allowed for fuel gas service.

Exceptions & special cases

The code allows an exception approach: if a field‑assembled riser or adapter is not factory‑tested, it must still be design‑certified to Category I of ASTM D2513 and 49 CFR 192.281(e) and be accompanied by the manufacturer’s qualified installation instructions (§ 1208.5.6.2).
Dielectric fittings/unions are only permitted where necessary (e.g., to electrically isolate special equipment) and then must meet the listed standards and be used per § 1322.6.1 (medical gas context) or § 605.15 (potable water). file
If the code references another authority (for example 49 CFR requirements), follow the external standard cited; the CPC requires the manufacturer to provide the installation instructions cited in those federal rules.

Note: The CPC text we retrieved points to § 1212.6 as the controlling limit for unions in fuel‑gas piping (see § 315.1) but the complete wording of § 1212.6 was not present in the material returned to me. For the precise, location‑specific restrictions on unions in gas piping consult § 1212.6 in the CPC (local copy) or your AHJ.

Common mistakes

Assuming any union is allowed on gas piping — the code links gas unions to § 1212.6; do not use unions on a gas run without verifying § 1212.6 and manufacturer approval.
Using plastic fittings that are not marked/approved (PE must meet ASTM D2513; PVC/CPVC are prohibited for fuel gas).
Installing a field‑assembled service head without design certification or without following the manufacturer’s qualified instructions required by 49 CFR 192.283(b).
Forgetting dielectric union requirements at dissimilar‑metal junctions — these must meet ASSE 1079 or IAPMO PS 66 when required.

Worked example — concrete scenario with numbers

Scenario: You are connecting a polyethylene (PE) service riser from a buried PE service lateral to a natural‑gas meter. The riser will be an anodeless riser using a service‑head adapter kit.

Steps to be code‑compliant:

Confirm the PE piping and fittings are marked “gas” and ASTM D2513 (PE material requirement).
Option A — use a factory‑assembled anodeless riser that the manufacturer recommends for natural gas and which has been leak‑tested by the manufacturer per written procedures. If you use this, you comply with § 1208.5.6.1.
Option B — use a field‑assembled anodeless riser / service‑head adapter kit: verify the service‑head adapter and any field‑assembled riser components are 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). Without that certification and instructions, the field‑assembly route does not meet § 1208.5.6.2.
If a union is needed between the meter and piping for service removal, check § 1212.6 to confirm unions are permitted in this gas‑piping location; do not assume permission — the CPC ties gas unions to § 1212.6 (see § 315.1). If a dielectric union is needed because the meter or fittings are dissimilar metals, use a dielectric union listed to ASSE 1079 or IAPMO PS 66. file

Result: Using a factory‑assembled anodeless riser that is manufacturer‑leak‑tested and using PE fittings marked ASTM D2513 satisfies the CPC requirements for an anodeless riser in § 1208.5.6.1; field kits are permitted only when they meet the design‑certification and instruction requirements of § 1208.5.6.2. file

Related provisions (useful to review)

§ 1208.5.6.1 — Factory‑assembled anodeless risers (manufacturer leak test requirement).
§ 1208.5.6.2 — Service‑head adapters and field‑assembled anodeless risers (design‑certification and 49 CFR references).
§ 315.1 — Unions (where permitted; gas use tied to § 1212.6).
§ 605.15 & § 605.16 — Dielectric unions and joints between various materials (ASSE 1079 / IAPMO PS 66).
§ 1208.5.4 — Plastic pipe, tubing, and fittings for fuel gas (ASTM D2513 / F2945).
§ 1208.5.7 – 1208.5.8 — Workmanship, defects, and metallic pipe threads (ASME B1.20.1).

Code references

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

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 § 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 § 5.5.7.5 High relevance — show source text
(8) Special fittings such as couplings, proprietarytype joints, saddle tees, gland-type compression fittings, and flared, flareless, or compressiontype tubing fittings shall be as follows: (a) Used within the fitting manufacturer’s pressure-temperature recommendations. (b) Used within the service conditions anticipated with respect to vibration, fatigue, thermal expansion, or contraction. (c) Acceptable to the Authority Having Jurisdiction.

(9) When pipe fittings are drilled and tapped in the field, the operation shall be in accordance with the following: (a) The operation shall be performed on systems having operating pressures of 5 psi (34 kPa) or less. (b) The operation shall be performed by the gas supplier or their designated representative.

(c) The drilling and tapping operation shall be performed in accordance with written procedures prepared by the gas supplier. (d) The fittings shall be located outdoors. (e) The tapped fitting assembly shall be inspected and proven to be free of leaks.

[NFPA 54:5.5.7.5] 1308.4.8 Plastic Piping Joints and Fittings. Plastic pipe, tubing, and fittings shall be joined in accordance with the manufacturers’ instructions. Section 1308.4.8.1 through Section 1308.4.8.4 shall be observed when making such joints. [NFPA 54:5.5.8] 1308.4.8.1 Joint Design. The joint shall be designed and installed so that the longitudinal pullout resistance of the joint will be at least equal to the tensile strength of the plastic piping material. [NFPA 54:5.5.8(1)] 1308.4.8.2 Heat Fusion Joint. Heat fusion joints shall be made in accordance with qualified procedures that have been established and proven by test to produce gastight joints at least as strong as the pipe or tubing being joined. Joints shall be made with the joining method recommended by the pipe manufacturer. Polyethylene heat fusion fittings shall be marked “ASTM D2513.” Polyamide heat fusion fittings shall be marked "ASTM F2945." [NFPA 54:5.5.8(2)]

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and temperature conditions and shall be selected giving consideration to joint tightness and mechanical strength under the service conditions. The joint shall be able to sustain the maximum end force due to the internal pressure and any additional forces due to temperature expansion or contraction, vibration, fatigue, or the weight of the pipe and its contents. [NFPA 54:5.5.7] 1308.4.7.1 Pipe Joints. Schedule 40 and heavier pipe joints shall be threaded, flanged, brazed, welded, or assembled with press-connect fittings listed to CSA/ANSI LC 4/CSA 6.32.

(1) Where nonferrous pipe is brazed, the brazing materials shall have a melting point in excess of 1000°F (538°C).

(2) Brazing alloys shall not contain more than 0.05 percent phosphorus. {NFPA 54:5.5.7.1} 1308.4.7.2 Copper Tubing Joints. Copper tubing joints shall be assembled with approved gas tubing fittings, shall be brazed with a material having a melting point in excess of 1000°F (538°C), or shall be assembled with press-connect fittings listed to CSA/ANSI LC 4/CSA 6.32.
CPC § 7.3 High relevance — show source text
3|7.3|9.9|14.6| |26|NP|NP|NP|NP|13.2|22.4|NP|NP|5.0|8.5|11.4|16.9| |28|NP|NP|NP|NP|15.1|25.7|NP|NP|5.7|9.7|13.1|19.4| |30|NP|NP|NP|NP|17.2|NP|NP|NP|6.5|11.0|14.9|22.0| |32|NP|NP|NP|NP|19.4|NP|NP|NP|7.3|12.4|16.8|24.8| |34|NP|NP|NP|NP|21.7|NP|NP|NP|8.2|13.9|18.8|NP| |36|NP|NP|NP|NP|24.1|NP|NP|NP|9.1|15.4|20.9|NP| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.
NP = Not Permitted. Pressure loss exceeds reasonable limits.
a. Values are applicable for underground piping materials listed in_ the California Plumbing Code_ and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
b. Values include the following length allowances for fittings: 25-percent length increase for actual lengths up to 100 feet and 15-percent length increase for actual lengths over
100 feet.
c. Flow rate from Section P2904.4.2. Add 5 gpm to the flow rate required by Section_R309.3.4.2_ where the water service pipe supplies more than one dwelling.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.
NP = Not Permitted. Pressure loss exceeds reasonable limits.
a. Values are applicable for underground piping materials listed in_ the California Plumbing Code_ and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
b. Values include the following length allowances for fittings: 25-percent length increase for actual lengths up to 100 feet and 15-percent length increase for actual lengths over
100 feet.
c. Flow rate from Section P2904.4.2. Add 5 gpm to the flow rate required by Section_R309.3.4.2_ where the water service pipe supplies more than one dwelling.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.
NP = Not Permitted. Pressure loss exceeds reasonable limits.
a. Values are applicable for underground piping materials listed in_ the California Plumbing Code_ and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
b. Values include the following length allowances for fittings: 25-percent length increase for actual lengths up to 100 feet and 15-percent length increase for actual lengths over
100 feet.
c. Flow rate from Section P2904.4.2.

CPC § 2.375 High relevance — show source text

1 These sizes are made of zinc-plated malleable iron. Can be installed on rigid steel conduits.

062288 Page 4 of 20 Rev. #20: 03−25−22

UG-1: Conduits Greenbook Underground Conduits

Rigid Steel Conduit and Fittings (continued)

Table 5 Material Codes for 90 ° Steel Conduit Sweeps, TBE

Figure 4 Conduit Sweep Threaded Both Ends

Conduit Size (inches)	Radius (inches)	Material Code
2	24	360081
3	36	362091
4	36	362090
4	60	360812
5	36	362109
6	36	362144
6	48	362145
6	60	360813

Rev. #20: 03−25−22 062288 Page 5 of 20

UG-1: Conduits Greenbook Underground Conduits

PVC and HDPE Conduit and Fittings

Notes

The depth of all couplings, adapters, swedge reducers, and bell ends must conform to the requirements listed in Table 2 of ASTM Standard F512.

Table 6 Data and Material Codes for Rigid Plastic Conduit Schedule

Table 6 Da 40	ata and Material Codes for Rigid Plastic Conduit S 1	Col3	Col4	Col5	Schedule
Conduit Size (inches)	Dimensions (inches)	Dimensions (inches)	Dimensions (inches)	Dimensions (inches)	Material Code
Conduit Size (inches)	Average Outside Diameter	Minimum Inside Diameter	Wall Thickness	Wall Thickness	Wall Thickness
Conduit Size (inches)	Average Outside Diameter	Minimum Inside Diameter	Minimum	Maximum	Maximum
2	2.375	2.021	0.154	0.113	360153
3	3.500	3.008	0.216	0.148	016471
4	4.500	3.961	0.237	0.184	016472
5	5.563	4.975	0.258	0.221	016473
6	6.625	5.986	0.280	0.257	016474

Figure 5 Rigid Plastic Conduit

Figure 6 PVC Coupling

Figure 7 Plastic-to-Steel Adapter

Figure 8 Swedge Reducer

1 See Note 14 on Page 2 for material specifications.

CPC § 0.15 Medium relevance — show source text
1. The neutral conductor of 2-wire, 120 V and 3-wire, 120/240 V (or 120/208 V) services must be securely connected to the neutral terminal of the meter socket and extended through to the neutral terminal of the service entrance switch. It must be continuous (without splice) from the service head to the service entrance switch.
2. At least 18 inches of service entrance conductors must be provided outside the service head.
3. Weatherproof wire is not permitted in conduit.
025055 Page 4 of 17 Rev. #20: 3/25/2022

OH: Services Greenbook Requirements for Customer-Owned Poles EMWP

Service Entrance and Load Side Conduit and Conduit Covering
1. Service entrance and load side conduit and conduit covering requirements must comply with applicable codes and local requirements. G.O. 95 requires that any conduit installed below the 8-foot level on the pole must be treated as a riser; in which case, the conduit must be either rigid galvanized steel or 2-inch minimum diameter Schedule 40 PVC.
Exception: Conduit that enters the top of an enclosure is considered to be “protected” by the enclosure and need not be treated as a riser unless installed below the 6-foot level. Conduit installed above the 6-foot or 8-foot level (whichever height applies) must be either: (1) galvanized rigid steel conduit, (2) rigid aluminum conduit, (3) electrical metallic tubing, (4) IMC, or (5) PVC plastic conduit having a minimum wall thickness of 0.15 inches (Schedule 40 for 2-inch PVC conduit or larger, Schedule 80 for 1-1/2-inch or smaller). All fittings must be rain-tight. If PVC plastic conduit is used, it need not be covered. If rigid steel or other approved metallic conduit is used, it must be enclosed with PVC “U” shaped molding for a minimum distance of 8 feet below the lowest open service entrance conductor. The covering must be fastened to the pole at intervals not greater than 3 feet (see Page 11).
1. Wood Block:
A. A wood block must be attached directly over the service head in the following situations:

(1) On a service pole where electrical metallic tubing, rigid steel, or IMC is used.

(2) On a wood pole with plastic conduit installation when the service head is metallic and the neutral service entrance conductor is not insulated.

B. A wood block over the service head is not required in the following instances:

(1) On a service pole with plastic conduit installation except as noted in Note 15, A. above.

(2) On a metallic pole, provided the pole is effectively grounded and provided all metallic conduits are adequately bonded to the metal pole with approved clamps or connectors.

C. Attach wood blocks as shown on Pages 8 through 10.
1. All conduit and fittings must be rain-tight.
2. Water pipe and fittings are not permitted for use as electrical conduit.
Service Entrance Switch
1. Main switch, receptacles, and other equipment on the load side of the meter must be of weatherproof design or protected by weatherproof enclosures. Such equipment must comply with local ordinances and must also comply with the California Building Standards Code - Electrical Regulations.
2. The switch cover must be locked if the enclosure contains exposed live parts.
Grounding

CPC § 1308.4.4.2.1 Medium relevance — show source text

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]

1308.4.6 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]

1308.4.6.1 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]

1308.4.6.2 Number of Threads. Field threading of metallic pipe shall be in accordance with Table 1308.4.6.2. [NFPA 54:5.5.6.3]

TABLE 1308.4.6.2

SPECIFICATIONS FOR THREADING METALLIC PIPE

[NFPA 54: TABLE 5.5.6.3]

IRON PIPE SIZE (inches)	APPROXIMATE LENGTH OF THREADED PORTION (inches)	APPROXIMATE NUMBER OF THREADS TO BE CUT
1⁄2	3⁄4	10
3⁄4	3⁄4	10
1	7⁄8	10
11⁄4	1	11
11⁄2	1	11
2	1	11
21⁄2	11⁄2	12
3	11⁄2	12
4	15⁄8	13

For SI units: 1 inch = 25.4 mm

CPC § 605.15 Medium relevance — show source text
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. Where connecting plastic pipe to other types of piping, approved types of adapter or transition fittings designed for the specific transition intended shall be used.

605.16.3 Stainless Steel to Other Materials. Where connecting stainless steel pipe to other types of piping, mechanical joints of the compression type, dielectric fitting, or dielectric union in accordance with ASSE 1079 or IAPMO PS 66 and designed for the specific transition intended shall be used.

606.0 Valves.

606.1 General. Valves up to and including 2 inches (50 mm) in size shall be copper alloy or other approved material. Sizes exceeding 2 inches (50 mm) shall be permitted to have bodies of cast iron, copper alloy, or other approved materials. Each gate or ball valve shall be a fullway or full-port type with working parts of the non-corrosive material. Where valves are made from copper alloys containing more than 15 percent zinc by weight and are used in plastic piping systems, they shall be resistant to dezincification and stress corrosion cracking in compliance with NSF/ANSI 14. Valves carrying water used in potable water systems shall comply with the requirements of ASME A112.4.14/CSA B125.14, ASME

B16.34, ASTM F1970, ASTM F2389, AWWA C500, AWWA C504, AWWA C507, IAPMO/ANSI Z1157, MSS SP-67, MSS SP-70, MSS SP-71, MSS SP-72, MSS SP-78, MSS SP-80, MSS SP-110, MSS SP-122, or NSF/ANSI 359. Valves intended to supply drinking water shall also comply with the requirements of NSF/ANSI/CAN 61. 606.2 Fullway Valve. A fullway valve controlling outlets shall be installed on the discharge side of each water meter and each unmetered water supply.
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

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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 § 9-4 Medium relevance — show source text

for all single-phase services over 600 amperes
and all three-phase services over 400 amperes.|See Table 9-4, below, for all single-phase services over 600 amperes
and all three-phase services over 400 amperes.|See Table 9-4, below, for all single-phase services over 600 amperes
and all three-phase services over 400 amperes.|See Table 9-4, below, for all single-phase services over 600 amperes
and all three-phase services over 400 amperes.|See Table 9-4, below, for all single-phase services over 600 amperes
and all three-phase services over 400 amperes.|

1 See “Notes” at the bottom of this page in reference to Table 9-3 and Table 9-4. 2 SeeCombination (OH/UG) Meter Panel,Section 6, Table 6-1, “Residential (0 Amps” on Page 6-13, for minimum dimensions of residential (combination) meter−225 Amps) Enclosure,” on Page 6-5, and Table 6-2, “Residential panels. 3 Single phase only. 4 800-amp services and greater must be three phase and terminate in pad-mounted equipment. Refer to Table 9-4 below. 5 Excludes the wall-mounted panel inCurrent-Transformer Cabinet (600 Amps, 1Ø or 3Ø, 800 Amps 3Ø),Section 7, Figure 7-5, “Underground Service Combination Meter and” on Page 7-10.

Table 9-4 Minimum Pad-Mounted (Floor-Standing) Switchboard Pull-Section Dimensions: Residential and Nonresidential, Single-Phase and Three-Phase

Service Rating (Amps)	Minimum Access Opening “W”	Col3	Termination Height “X” 5
Service Rating (Amps)	3-Wire	4-Wire	4-Wire
Service Rating (Amps)	All Measurements in Inches	All Measurements in Inches	All Measurements in Inches
321−400	24	24	42 Minimum−72 Maximum (see Note 4 below)
401−800	24	24	24
801−1,200	24	30	30
1,201−2,000	30	35	35
2,001−2,500	—	42	60 Minimum−72 Maximum

Notes in reference to Table 9-3 and Table 9-4.

If termination bus-landing stubs are installed perpendicular to the back of the board, a wider enclosure dimension will be required to accommodate the installation of PG&E’s cables.
Maintain a clear working space. When return flanges are necessary, ensure they do not intrude into service-conductor space.
Dimension W is the minimum width of the pull section access opening.
The minimum termination height is 40-1/4 inches for bottom-fed service sections only as shown in

CPC § 5.5.3.5 Medium 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 § 1.859 Medium relevance — show source text

78|–|1.859|0.463| |35.31|–|2.247|0.559| |38.84|–|2.667|0.663| |42.37|–|3.121|0.775| |45.90|–|3.607|0.895| |49.43|–|4.125|1.022| |52.97|–|–|1.157| |56.50|–|–|1.299| |60.03|–|–|1.449| |63.56|–|–|1.607| |67.09|–|–|1.772| |70.62|–|–|1.944| |81.21|–|–|2.503| |91.81|–|–|3.127| |102.40|–|–|3.813|

For SI units: 1 standard cubic foot per minute = 28.32 SLPM, 1 inch = 25 mm, 1 foot = 304.8 mm, 1 pound-force per square inch = 6.8947 kPa

Notes: 1 Based on pressure of 14.7 psig (101 kPa) at 68°F (20°C). 2 Based on pressure of 55 psig (379 kPa) at 68°F (20 °C).

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TABLE 1323.1.4(5) PRESSURE LOSS FOR VACUUM (continued)

FLOW RATE (SCFM)1	VACUUM LOSS (inch of mercury) PER 100 FEET FOR COPPER TUBE2	Col3	Col4	Col5	Col6
FLOW RATE (SCFM)1	3⁄4 INCH TUBE	1 INCH TUBE	11⁄4 INCH TUBE	11⁄2 INCH TUBE	2 INCH TUBE
49.43	–	–	–	3.645	0.956
52.97	–	–	–	4.122	1.081
56.50	–	–	–	4.626	1.212
63.56	–	–	–	–	1.495
70.62	–	–	–	–	1.803
77.68	–	–	–	–	2.138
84.74	–	–	–	–	2.497
91.81	–	–	–	–	2.882
98.87	–	–	–	–	3.291
105.93	–	–	–	–	3.724
112.99	–	–	–	–	4.181

CPC § 1303.9 High relevance — show source text
Infection Control and Construction Risk
Assessment Professional Qualification Standard|Professional
Qualifications|1303.9| |IAPMO IGC 78-2019|Drain, Waste and Vent (DWV) Internal Cleanout Fittings|DWV Components|Table 707.2| |IAPMO IGC 109-2019|Water Distribution Manifolds|Valves|606.5.1| |IAPMO IGC 127-2018|Combined Hand-Washing Systems|Fixtures|407.1, 420.1| |IAPMO IGC 154-2019|Shower and Tub/Shower Enclosures, Bathtubs with Glass Pres-
sure-Sealed Doors, and Shower/Steam Panels|Fixtures|408.1| |IAPMO IGC 167-2011ae2
(R2021)|Solid Waste Containment Interceptors|Interceptors|Table 1009.1| |IAPMO IGC 183-2016|Oil/Water Separators and Coalescing Plate Separators|DWV Components|Table 1009.1, 1017.2| |IAPMO IGC 196-2018|Condensate Traps and Overflow Switches for Air-Conditioning
Systems|Condensate Traps|814.4| |IAPMO IGC 224-2018|ABS, PVC and Cast Iron DWV Test Fitting with Integral
Cleanout|DWV Components|Table 707.2| |IAPMO IGC 305-2019|ABS and PVC Horizontal Backwater Valves with Lifting
Devices|Valves|710.6| |IAPMO IGC 322-2018|Alkaline Water – Drinking Water Treatment Units|Miscellaneous|611.1.1| |IAPMO IGC 324-2019|Alternate Water Source Systems for Multi-Family, 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.
California Plumbing Code Medium relevance — show source text

LEADER,
OR PIPE|FLOW|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)|MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS AT VARIOUS RAINFALL RATES
(square feet)**| |inches|gpm1|1 (in/h)|2 (in/h)|3 (in/h)|4 (in/h)|5 (in/h)|6 (in/h)|7 (in/h)|8 (in/h)|9 (in/h)|10 (in/h)|11 (in/h)|12 (in/h)| |2|30|2880|1440|960|720|575|480|410|360|320|290|260|240| |3|92|8800|4400|2930|2200|1760|1470|1260|1100|980|880|800|730| |4|192|18 400|9200|6130|4600|3680|3070|2630|2300|2045|1840|1675|1530| |5|360|34 600|17 300|11 530|8650|6920|5765|4945|4325|3845|3460|3145|2880| |6|563|54 000|27 000|17 995|13 500|10 800|9000|7715|6750|6000|5400|4910|4500| |8|1208|116 000|58 000|38 660|29 000|23 200|19 315|16 570|14 500|12 890|11 600|10 545|9600|
CPC § 314.3 Medium relevance — show source text
Tunnels shall have a clear height of 2 feet (610 mm) above the pipe and shall be limited in length to one-half the depth of the trench, with a maximum length of 8 feet (2438 mm). Where pipes are driven, the drive pipe shall be not less than one size larger than the pipe to be laid.

314.3 Open Trenches. Excavations required to be made for the installation of a building drainage system or part thereof, within the walls of a building, shall be open trench work and shall be kept open until the piping has been inspected, tested, and accepted.

314.4 Excavations. Excavations shall be completely backfilled as soon after inspection as practicable. Precaution shall be taken to ensure compactness of backfill around piping without damage to such piping. Trenches shall be backfilled in thin layers to 12 inches (305 mm) above the top of the piping with clean earth, which shall not contain stones, boulders, cinder fill, frozen earth, construction debris, or other materials that will damage or break the piping or cause corrosive action. Mechanical devices such as bulldozers, graders, etc., shall be permitted to be then used to complete backfill to grade. Fill shall be properly compacted. Precautions shall be taken to ensure permanent stability for pipe laid in filled or made ground.

Underground thermoplastic pipe and fittings for sewers and other gravity flow applications shall be installed in accordance with this code and Section 314.4.1.

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314.4.1 Installation of Thermoplastic Pipe and Fittings. Trench width for thermoplastic sewer pipe shall be not less than 1.25 times the outside diameter of the piping plus 12 inches (305 mm) or the outside diameter of the piping plus not less than 16 inches (406 mm). Thermoplastic piping shall be bedded in not less than 4 inches (102 mm) of granular fill supporting the piping. The backfill for thermoplastic piping shall be compacted along the sides of the piping in 6 inch (152 mm) layers and continue to not less than 12 inches (305 mm) above the piping. Compaction shall be not less than an 85 percent standard proctor density.

315.0 Joints and Connections.

315.1 Unions. Approved unions shall be permitted to be used in drainage piping where accessibly located in the trap seal or between a fixture and its trap; in the vent system, except underground or in wet vents; at any point in the water supply system; and in gas piping as permitted by Section 1212.6.

315.2 Prohibited Joints and Connections. A fitting or connection that has an enlargement, chamber, or recess with a ledge, shoulder, or reduction of pipe area that offers an obstruction to flow through the drain shall be prohibited.

316.0 Increasers and Reducers.

316.1 General. Where different sizes of pipes and fittings are to be connected, the proper size increasers or reducers or reducing fittings shall be used between the two sizes. Copper alloy or cast-iron body cleanouts shall not be used as a reducer or adapter from cast-iron drainage pipe to iron pipe size (IPS) pipe.
CPC § 9-3 Medium relevance — show source text
Applicants must ensure that underground service-termination compartments or sections meet the following requirements.

A. The termination compartment covers must be removable, sealable, provided with two lifting handles, and limited to a maximum size of 9 square feet.

B. The cover panel can be sealed using two drilled stud-nut and wing-nut assemblies on opposite sides of the panel.

C. The minimum dimensions specified in Table 9-3, “Minimum Wall-Mounted Pull-Section Dimensions: Residential and Nonresidential, Single-Phase or Three-Phase,” on Page 9-13, are used when the service conduit enters the bottom of the termination compartment or termination enclosure and all load conductors exit above the terminals. When the service conduit enters from the side or back of the pull box, use the X dimensions from the closest portion of the conduit to the nearest termination bolt.

D. Applicants must not use wall-mounted service-termination and pull enclosures for three-phase, nonresidential installations rated 401 amps through 2,500 amps. See Table 9-4, “Minimum Pad-Mounted (Floor-Standing) Switchboard Pull-Section Dimensions: Residential and Nonresidential,
```
                                              Single-Phase and Three-Phase,” on Page 9-13, and Section 10, Table 10 1,
```
“Minimum Bottom-Fed Pull Section Dimensions,” on Page 10-27, for bottom-entry installation requirements. See Table 10-2, “Pull Section Dimensions (Minimums) Below Ground Level,” on Page 10-31, for side-entry or back-entry requirements.

E. A PG&E project coordinator is contacted when developing nonresidential, 401-amps-and-above services. Applicants must ensure that they meet PG&E’s requirements for underground service-termination pull boxes, which include the following:
1. Installing multiple sets of utility service cables.
2. Provide stacking provisions (i.e., bolts) to terminate cables in any three-phase installation that is 1,200 amps or greater.
3. Providing additional space (i.e., depth, width, and termination height), when required, in any section of switchboard, panel board, or other enclosure intended as a termination point for PG&E’s service cables. This additional space will provide the mandatory clearances between phases and grounded surfaces, as well as accommodate the installed service cables.
See Numbered Document 063928, “Methods and Requirements for Installing Non-Residential Underground Electric Services 0–600 Volts to Customer-Owned Facilities,” for the appropriate conduit and cable requirements to use when designing nonresidential service installations. This document is included in Appendix C, “Electric and Gas Engineering Documents.”

F. See additional requirements for pad-mounted switchboards in Section 10,
CPC § 5.1.10.8 Medium relevance — show source text
(3) They shall be made up with polytetrafluoroethylene (PTFE) tape or other thread sealant recommended for oxygen service, with sealant applied to the male threads only and care taken to ensure sealant does not enter the pipe. [NFPA 99:5.1.10.8] 1322.6 Other Types of Fittings. Listed or approved metallic gas tube fittings that, when made up, provide a permanent joint having the mechanical, thermal, and sealing integrity of a brazed joint shall be permitted to be used. [NFPA 99:5.1.10.9.1]

1322.6.1 Dielectric Fittings. Dielectric fittings that comply with the following shall be permitted only where required by the manufacturer of special medical equipment to electrically isolate the equipment from the system distribution piping:

(1) They shall be of brass or copper construction with an approved dielectric.

(2) They shall be permitted to be a union.

(3) They shall be clean for oxygen where used for medical gases and medical support gases. [NFPA 99:5.1.10.9.2]

1322.7 Prohibited Joints. The following joints shall be prohibited throughout medical gas and vacuum distribution pipeline systems:

(1) Flared and compression-type connections, including connections to station outlets and inlets, alarm devices, and other components.

(2) Other straight-threaded connections, including unions.

(3) Pipe-crimping tools used to permanently stop the flow of medical gas and vacuum piping.

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(4) Removable and nonremovable push-fit fittings that employ a quick assembly push fit connector. [NFPA 99:5.1.10.10]

1323.0 Installation of Piping and Equipment. 1323.1 Required Pipe Sizing. Piping systems shall be designed and sized to deliver the required flow rates at the utilization pressures. [NFPA 99:5.1.10.11.1.1]
CPC § 1322.6.1 Medium relevance — show source text
1322.6.1 Dielectric Fittings. Dielectric fittings that comply with the following shall be permitted only where required by the manufacturer of special medical equipment to electrically isolate the equipment from the system distribution piping:

(1) They shall be of brass or copper construction with an approved dielectric.

(2) They shall be permitted to be a union.

(3) They shall be clean for oxygen where used for medical gases and medical support gases. [NFPA 99:5.1.10.9.2]

1322.7 Prohibited Joints. The following joints shall be prohibited throughout medical gas and vacuum distribution pipeline systems:

(1) Flared and compression-type connections, including connections to station outlets and inlets, alarm devices, and other components.

(2) Other straight-threaded connections, including unions.

(3) Pipe-crimping tools used to permanently stop the flow of medical gas and vacuum piping.

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(4) Removable and nonremovable push-fit fittings that employ a quick assembly push fit connector. [NFPA 99:5.1.10.10]

1323.0 Installation of Piping and Equipment. 1323.1 Required Pipe Sizing. Piping systems shall be designed and sized to deliver the required flow rates at the utilization pressures. [NFPA 99:5.1.10.11.1.1]

1323.1.1 Mains and Branches. Mains and branches in medical gas piping systems shall be not less than DN15 (NPS [1] ⁄ 2 ) ( [5] ⁄ 8 inch O.D.) size. Mains and branches in medical-surgical vacuum systems shall be not less than DN20 (NPS [3] ⁄ 4 ) ( [7] ⁄ 8 inch O.D.) size. [NFPA 99:5.1.10.11.1.2, 5.1.10.11.1.3] 1323.1.2 Drops to Individual Stations. Drops to individual station outlets and inlets shall be not less than DN15 (NPS [1] ⁄ 2 ) ( [5] ⁄ 8 inch O.D.) size. [NFPA 99:5.1.10.11.1.4] 1323.1.3 Runouts and Connecting Tubing. Runouts to alarm panels and connecting tubing for gauges and alarm devices shall be permitted to be DN8 (NPS [1] ⁄ 4 ) ( [3] ⁄ 8 inch O.D.) size. [NFPA 99:5.1.10.11.1.5]

1323.1.4 Maximum Demand. Where the maximum demand for each medical gas or vacuum system does not exceed the values in Table 1323.1.4(1) through Table 1323.1.4(6), the size of pipe of each section of the system shall be determined in accordance with Section 1323.1.5. The size for systems beyond the range of Table 1323.1.4(1) through Table 1323.1.4(6) shall be determined in accordance with Section 1323.1.6.
CPC § 603.4.9 Medium relevance — show source text
– U –

UNDERGROUND

Backflow prevention devices . . . . . . . . . . . . . . .603.4.9 Building storm drains . . . . . . . . . . . . . . . . . . . . .1101.4.4 Drainage piping . . . . . . . . . . . .701.2, Table 701.2, 720.0 Fuel gas piping . . . . . . .1203.2, 1208.5.2.4, 1208.5.3.4,

1210.1, E 401.2, E 402.2,

E 403.7, E 403.8, E 403.8.4

Gray water piping . . . . . . . . . . . . . . . . . . . . . . .1503.9.2 Medical gas and medical vacuum piping . . . . . . . . . . .1323.2, 1323.5.1 Stop-and-waste valves . . . . . . . . . . . . . . . . . . .603.5.17 Storm water piping . . . . . . . . . . . . . . . . .1101.4, 1101.4.2

Tanks . . . . . . . . . . . . . . . . .1503.9.1, 1601.11.2, 1603.8,

E 403.11, K 105.0

Unions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315.1

Vent material . . . . . . . . . . . . . . . . . . . . . . . .903.1, 903.2

Water piping . . . . . . . . . . . . . . .604.3, 609.9, 1506.10.4

UNIONS

Dielectric . . . . . . . . . . . . . . .605.15, 605.16.1, 605.16.3

Fuel gas piping . . . . . . . . . . . . . . . . . . .1212.6, E 404.2

Location . . . . . . . . . . . . . . . . . . . . . .315.1, 609.5, 710.6

Medical gas and medical vacuum piping . . . . . . . . . . . . . . . . . .1322.7 Sump pump . . . . . . . . . . . . . . . . . . . . . . . . . . . .1101.6.2

Where allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . .315.1

UNIT LOADING OF TRAPS . . . . . . . .702.1, Table 702.1(1) UNITS, FIXTURE . . . . . . . . . . . . . . . . . . .(see Fixture, units)

UNLAWFUL CONNECTIONS . . . . . . .404.2, 602.0, 1205.2

UNSANITARY, DEFINITION . . . . . . . . . . . . . . . . . . . .223.0
CPC § 16.3 Medium relevance — show source text
1 “Threaded Bushing”| |Threaded Tees, Elbows,
Unions, and Bushings|Ward
(Malleable Iron)|Ward
(Malleable Iron)| |Threaded Tees, Elbows,
Unions, and Bushings|Anvil
(Malleable Iron)|Anvil
(Malleable Iron)| |Steel One-Piece Line
Stopper Fittings|Mueller|
GDS C-16.3, “Mueller H-17190 Welding Line
Stopper Fitting”

GDS C-16.4, “Mueller H-17191 Mechanical Joint Like
Stopper Fitting”

GDS C-64.1, “TDW Shortstopp II: 6″—12″ Fitting”| |Steel One-Piece Line
Stopper Fittings|TDW|TDW| |Steel Save-A-Valves|Mueller|
GDS C-14, “Mueller Save-A-Valve Nipples”| |<2″ Diameter Steel
Seamless Pipe|PTC Alliance
(Darlington, SC)|
GDS A-15, “Code Numbers for Steel Pipe”| |<2″ Diameter Steel
Seamless Pipe|Michigan Seamless
Tube (South Lyon, MI)|Michigan Seamless
Tube (South Lyon, MI)| |<2″ Diameter Steel
Seamless Pipe|Benteler Tube & Steel
(Shreveport, LA)|Benteler Tube & Steel
(Shreveport, LA)| |Steel Service Tees|Continental Industries
(Tulsa, OK)|
GDS C-10, “Mueller Service Tees Types H-17500
and H-17501”

GDS C-10.1, “Mueller Flanged Tees Types H-17505 and
H-17506”

GDS C-11, “Mueller Valve, Tee-Type H-17656”

GDS C-13, “Service Tapping Tee with Coupon Retaining
Punch”

GDS B-91, “Transition Fittings for Polyethylene Pipe”| |Steel Service Tees|Mueller|Mueller| |Steel Two-Piece Line
Stopper Fittings|Mueller|
GDS C-15.2, “Mueller Welding Line Stopper Fittings
H-17055, H-17056, H-17155, and H-17156”

GDS C-15.3, “Mueller Welding Line Stopper Fittings
H-17255, H-17256, H 17257, H-17275, H-17276,
and H-17277”| |Steel Two-Piece Line
Stopper Fittings|Blackhawk (Stopple
fitting)|Blackhawk (Stopple
fitting)| |Steel Two-Piece Line
Stopper Fittings|TDW (Stopple fitting)|TDW (Stopple fitting)| |Steel Two-Piece Line
Stopper Fittings with Bottom
Connection|Mueller|
GDS C-16.2, “Mueller Welding Line Stopper Fittings with
Bottom Connection”| |Steel Two-Piece Spherical
Line Stopper Fittings with
Bottom or Side Connection|Mueller|
GDS C-17,

CPC § 13.3 Medium relevance — show source text

Table 1. PG&E-Approved Manufacturers (continued)

Material	Approved Manufacturer (Plant)	Document Reference
Swage Nipples	Mill Iron Works	 GDS B-13.3, “Concentric Reducing Nipple (Swage Nipple)”
Swage Nipples	Perfect Pipe	Perfect Pipe
Stainless Steel Pipe Nipples	Swagelok	 GDS B-13.5, “Stainless Steel Threaded Nipple”
Stainless Steel Pipe Nipples	Hoke	Hoke
Stainless Steel Pipe Nipples	SSP TruFit	SSP TruFit
Threaded Tees, Elbows, Unions, and Bushings	Bonney Forge (Forged Steel)	 GDS B-12, “Standard 90° Threaded Elbows”  GDS B-12.1, “Standard Reducing 90° Elbows”  GDS B -12.2, “Standard 90° Threaded Street Elbows”  GDS B-12.3, “45° Threaded Elbow”  GDS B-14, “Standard Threaded Tee”  GDS B-14.1, “Standard Threaded Street Tee”  GDS B-14.2, “Reducing Threaded Tee”  GDS B-15, “Standard Threaded Unions”  GDS B-15.1 “Threaded Bushing”
Threaded Tees, Elbows, Unions, and Bushings	Ward (Malleable Iron)	Ward (Malleable Iron)
Threaded Tees, Elbows, Unions, and Bushings	Anvil (Malleable Iron)	Anvil (Malleable Iron)
Steel One-Piece Line Stopper Fittings	Mueller	 GDS C-16.3, “Mueller H-17190 Welding Line Stopper Fitting”  GDS C-16.4, “Mueller H-17191 Mechanical Joint Like Stopper Fitting”  GDS C-64.1, “TDW Shortstopp II: 6″—12″ Fitting”
Steel One-Piece Line Stopper Fittings	TDW	TDW
Steel Save-A-Valves	Mueller	 GDS C-14, “Mueller Save-A-Valve Nipples”
<2″ Diameter Steel Seamless Pipe	PTC Alliance (Darlington, SC)	 GDS A-15, “Code Numbers for Steel Pipe”
<2″ Diameter Steel Seamless Pipe	Michigan Seamless Tube (South Lyon, MI)	Michigan Seamless Tube (South Lyon, MI)
<2″ Diameter Steel Seamless Pipe	Benteler Tube & Steel (Shreveport, LA)	Benteler Tube & Steel (Shreveport, LA)
Steel Service Tees	Continental Industries (Tulsa, OK)	 GDS C-10,

CPC § 604.3 Medium relevance — show source text
Water piping . . . . . . . . . . . . . . .604.3, 609.9, 1506.10.4

UNIONS

Dielectric . . . . . . . . . . . . . . .605.15, 605.16.1, 605.16.3

Fuel gas piping . . . . . . . . . . . . . . . . . . .1212.6, E 404.2

Location . . . . . . . . . . . . . . . . . . . . . .315.1, 609.5, 710.6

Medical gas and medical vacuum piping . . . . . . . . . . . . . . . . . .1322.7 Sump pump . . . . . . . . . . . . . . . . . . . . . . . . . . . .1101.6.2

Where allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . .315.1

UNIT LOADING OF TRAPS . . . . . . . .702.1, Table 702.1(1) UNITS, FIXTURE . . . . . . . . . . . . . . . . . . .(see Fixture, units)

UNLAWFUL CONNECTIONS . . . . . . .404.2, 602.0, 1205.2

UNSANITARY, DEFINITION . . . . . . . . . . . . . . . . . . . .223.0

2025 CALIFORNIA PLUMBING CODE 583

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INDEX

UPC, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223.0

URINALS . . . . . . . . . . . . . . . . . .402.5, 402.6, 405.2, 412.1,

412.1.1, 412.1.2, 412.1.3, 412.1.4,

412.1.4.1, 413.0, 418.3, 601.2,

603.5.1, 603.5.2, 707.4, 710.3,

910.7, 1003.1, 1014.1, 1014.3.2.1,

1501.9, 1505.1, 1506.1, 1506.10.2,

1506.10.5, 1602.1, 1603.14, 1603.19,

1604.2, E 501.2, E 501.5,

K 105.11 L 402.3

USE OF ALTERNATE MATERIAL . . . . . . . . . . . . . . . .301.3

USER OUTLET, DEFINITION . . . . . . . . . . . . . . . . . . .223.0

– V –

VACUUM BREAKERS . . . . . . . . . . . .224.0, 412.2, 601.3.4,

CPC § 1.75 Medium relevance — show source text

250|1.75|0.65|3.25|9.25|6.00|303844|303844| |1/0|2|SAPT-1/0-26|YE25R-60|0.250|1.75|0.65|3.25|9.25|6.00|303845|303845| |4/0|2/0|SAPT-4/0-206|YE28R-60|0.375|1.54|0.91|3.50|10.9|6.00|303846|W249
U249
U2492| |350|4/0|PTB-350-6|YE31AG3|0.460|2.25|1.12|4.70|10.7|6.00|303554|−
U31ART
U31ART2| |500/60
0|500|PTM-500-346|YE34AP-
GE|0.750|2.56|1.57|6.30|12.3|6.00|300013|−
U34ART3
U34ART2,3| |700|500|PTL-750|YE39AGB|0.750|2.56|1.60|6.30|12.3|6.00|303555|−
−
P39ART| |1,000|700|PTF-1000-34
6|YE44AG7|0.750|2.56|1.60|6.30|12.3|6.00|033757|−
−
P44ART|

1 Within this column, the first entry corresponds to a 6-ton press tool, the second entry corresponds to a 12-ton press tool, and the third entry corresponds to a 15-ton press tool. 2 A U-die adapter must be used when utilizing U-dies in 15-ton press tool. 3 Homac equivalent of this die is 106A.

Notes

The material for the pin terminals is on Table 41. Copper Rod-Soft Drawn, Tinned, Aluminum Connector EC Grade, Untinned
Connector is supplied pre-filled with inhibitor and sealed.
Connector is supplied pre-filled with inhibitor and sealed.
Pin terminals connected to copper secondary conductors use a copper connector. Pin terminals connected to aluminum secondary conductors use a fired wedge or h-tap.

Application

To make straight connections of insulated aluminum secondary neutral to bare copper neutral, see Note 10 Page 7.
To connect aluminum primary stress cone termination to terminal tap connector or cutout.
To make watertight termination for secondary risers.

015251 Page 38 of 39 Rev. #07: 03-25-22

UG-1: Connectors Greenbook Connectors for Insulated Cables Underground Distribution Systems

Pin Terminals (continued)

Table 42 Color Coding	Col2
Color Coding Requirements for Plastic End Plugs in Pin Terminals	Color Coding Requirements for Plastic End Plugs in Pin Terminals
Conductor Size	Plug Color
#6	Blue
#2	Red
1/0	Yellow
4/0	Pink
350	Brown
700	Purple

Table 43 Specifications and Ordering Information for Copper Pin Terminal

CPC § 313.6 Medium relevance — show source text
Table 313.6 Hanger Rod Sizes . . . . . . . . . . . . .53

313.7 Gas Piping . . . . . . . . . . . . . . . . . . .53

314.0 Trenching, Excavation, and Backfill . . . . . . . . . . . . . . . . . . . . . .53

314.1 Trenches . . . . . . . . . . . . . . . . . . . . .53

314.2 Tunneling and Driving . . . . . . . . . .53

314.3 Open Trenches . . . . . . . . . . . . . . . .53

314.4 Excavations . . . . . . . . . . . . . . . . . .53

315.0 Joints and Connections . . . . . . . . .54

315.1 Unions . . . . . . . . . . . . . . . . . . . . . .54

315.2 Prohibited Joints and

Connections . . . . . . . . . . . . . . . . . .54

316.0 Increasers and Reducers . . . . . . . .54

316.1 General . . . . . . . . . . . . . . . . . . . . . .54

317.0 Food-Handling Establishments . . . .54

317.1 General . . . . . . . . . . . . . . . . . . . . . .54

318.0 Test Gauges . . . . . . . . . . . . . . . . . .54

318.1 General . . . . . . . . . . . . . . . . . . . . . .54

318.2 Pressure Tests (10 psi or less) . . .54

318.3 Pressure Tests (greater than 10 psi to 100 psi) . . . . . . . . . . . . . .54

318.4 Pressure Tests (exceeding 100 psi) . . . . . . . . . . . . . . . . . . . . . .54

318.5 Pressure Range . . . . . . . . . . . . . . .54

319.0 Medical Gas and Vacuum

Systems . . . . . . . . . . . . . . . . . . . . .54

319.1 General . . . . . . . . . . . . . . . . . . . . . .54

320.0 Rehabilitation of Piping Systems . .54

320.1 General . . . . . . . . . . . . . . . . . . . . . .54

321.0 Essential Plumbing Provisions . . . .54

322.0 Psychiatric Services . . . . . . . . . . . .54

323.0 Plumbing Equipment Schedules . . .55

Table 313.3 Hangers and Supports . . . . . . . . . .55

CHAPTER 4 PLUMBING FIXTURES

AND FIXTURE FITTINGS . . . . . . .57

401.0 General . . . . . . . . . . . . . . . . . . . . . .59

401.1 Applicability . . . . . . . . . . . . . . . . . . .59
CPC § 701.2 Medium relevance — show source text
Table 701.2, 903.2, 1208.5.3.3,

A 105.2, E 403.5

TUNNELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314.2

TYPE B

GAS VENTS . . . . . . . . . . . . . . .224.0, 509.1, Table 509.4,

509.5.5, 509.6.1, 509.6.2.1,

509.6.2.2, 509.6.3.2,

Table 509.7.3.4(1), 509.7.3.5,

509.10.1.1, 509.10.1.2,

509.10.8.2, 509.10.13, 510.1.6,

510.1.10, 510.2.2, 510.2.15,

510.2.19, 510.2.20,

510.2.22, Appendix G

TYPE BW GAS VENTS . . . . . . . .224.0, Table 509.4, 509.6.1,

TYPE L GAS VENTS . . . . . . . . . . . . . . .224.0, Table 509.4,

509.6.1, 509.6.2.2,

Table 509.7.3.4(1), 509.10.1.1,

509.10.1.2, 509.10.12

– U –

UNDERGROUND

Backflow prevention devices . . . . . . . . . . . . . . .603.4.9 Building storm drains . . . . . . . . . . . . . . . . . . . . .1101.4.4 Drainage piping . . . . . . . . . . . .701.2, Table 701.2, 720.0 Fuel gas piping . . . . . . .1203.2, 1208.5.2.4, 1208.5.3.4,

1210.1, E 401.2, E 402.2,

E 403.7, E 403.8, E 403.8.4

Gray water piping . . . . . . . . . . . . . . . . . . . . . . .1503.9.2 Medical gas and medical vacuum piping . . . . . . . . . . .1323.2, 1323.5.1 Stop-and-waste valves . . . . . . . . . . . . . . . . . . .603.5.17 Storm water piping . . . . . . . . . . . . . . . . .1101.4, 1101.4.2

Tanks . . . . . . . . . . . . . . . . .1503.9.1, 1601.11.2, 1603.8,

E 403.11, K 105.0

Unions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315.1
CPC § 609.0 Medium relevance — show source text
609.0 Installation, Testing, Unions, and Location. 609.1 Installation. Water piping shall be adequately supported in accordance with Table 313.3. Burred ends shall be reamed to the full bore of the pipe or tube. Changes in direction shall be made by the appropriate use of fittings, except that changes in direction in copper or copper alloy tubing shall be permitted to be made with bends, provided that such bends are made with bending equipment that does not deform or create a loss in the cross-sectional area of the tubing. Changes in direction are allowed with flexible pipe and tubing without fittings in accordance with the manufacturer’s instructions. Provisions shall be made for expansion in hotwater piping. Piping, equipment, appurtenances, and devices shall be installed in a workmanlike manner in accordance with the provisions and intent of the code. Building supply yard piping shall be not less than 12 inches (305 mm) below the average local frost depth. The cover shall be not less than 12 inches (305 mm) below finish grade. 609.2 Trenches. Water pipes shall not be run or laid in the same trench as building sewer or drainage piping con structed of clay or materials that are not approved for use within a building unless both of the following conditions are met: (1) The bottom of the water pipe shall be not less than 12 inches (305 mm) above the top of the sewer or drain line. (2) The water pipe shall be placed on a solid shelf excavated at one side of the common trench with a clear horizontal distance of not less than 12 inches (305 mm) from the sewer or drain line.

Water pipes crossing sewer or drainage piping constructed of clay or materials that are not approved for use within a building shall be laid not less than 12 inches (305 mm) above the sewer or drainpipe. 609.3 Under Concrete Slab. Water piping installed within a building and in or under a concrete floor slab resting on the ground shall be installed in accordance with the following requirements:

(1) Ferrous piping shall have a protective coating of an approved type; machine applied and in accordance with recognized standards. Field wrapping shall provide equivalent protection and shall be restricted to those short sections and fittings necessarily stripped for threading. Zinc coating (galvanizing) shall not be deemed adequate protection for piping or fittings. Approved nonferrous piping shall not be required to be wrapped.

(2) Copper or copper alloy tubing shall be installed without joints where possible. Where joints are permitted, they shall be brazed, and fittings shall be wrought copper.

For the purpose of this section, “within a building” shall mean within the fixed limits of the building foundation.

609.4 Testing. Upon completion of a section or of the entire hot and cold water supply system, the system shall be tested with water or air. The potable water test pressure shall be greater than or equal to the working pressure under which the system is to be used. The air pressure shall be a minimum of 50 psi (345 kPa). Plastic pipe shall not be tested with air. The piping system shall withstand the test pressure without showing evidence of leakage for a period of not less than 15 minutes.

Exception: PEX, PP or PE-RT tube shall be permitted to be tested with air where permitted by the manufacturer’s instructions.

CPC § 1210.3.5.1 Medium relevance — show source text

TABLE 1210.3.5.1

SUPPORT OF PIPING

[NFPA 54: TABLE 7.2.6.2]

STEEL PIPE, NOMINAL SIZE OF PIPE (inches)	SPACING OF SUPPORTS (feet)	NOMINAL SIZE OF TUBING SMOOTH WALL (inches O.D.)	SPACING OF SUPPORTS (feet)
1⁄2	6	1⁄2	4
3⁄4 or 1	8	5⁄8 or3⁄4	6
11⁄4 or larger (horizontal)	10	7⁄8 or 1 (horizontal)	8
11⁄4 or larger (vertical)	Every floor level	1 or larger (vertical)	Every floor level

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm

1210.3.5.2 Expansion and Contraction. Supports, hangers, and anchors shall be installed so as not to interfere with the free expansion and contraction of the piping between anchors. All parts of the supporting system shall be designed and installed so they are not disengaged by movement of the supported piping. [NFPA 54:7.2.6.3] 1210.3.5.3 Piping on Roofs. Gas piping installed on the roof surfaces shall be supported in accordance with Table 1210.3.5.1. Gas piping shall be elevated not less than 3½ inches (89 mm) above the roof surface. [NFPA 54:7.2.6.4.1, 7.2.6.4.2] 1210.4 Concealed Piping in Buildings. Gas piping in concealed locations shall be installed in accordance with this section. [NFPA 54:7.3.1]

TABLE 1210.3.5.1

SUPPORT OF PIPING

[NFPA 54: TABLE 7.2.6.2]

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm

2025 CALIFORNIA PLUMBING CODE 225

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FUEL GAS PIPING

1210.4.1 Connections. Where gas piping is to be concealed, connections shall be of the following type:

(1) Pipe fittings such as elbows, tees, couplings, and right/left nipple/couplings.

(2) Joining tubing by brazing (see Section 1208.5.9.1).

(3) Press-connect fittings listed to ANSI LC 4/CSA 6.32.

(4) CSST fittings listed to CSA/ANSI LC 1/CSA 6.26.

CPC § 402.4 Medium relevance — show source text
E 402.4 Gas Meters. Where installed, gas meters shall be supported by a post or bracket placed on a firm footing or other means providing equivalent support and shall not depend on the gas outlet riser for support. [NFPA 501A:4.2.3.1]

E 402.4.1 Location of Meters. Each gas meter shall be installed in an accessible location and shall be provided with unions or other fittings so that the meter can be removed easily and placed in an upright position. Meters shall not be installed in unventilated or inaccessible locations or closer than 3 feet (914 mm) to sources of ignition. [NFPA 501A:4.2.3.2 – 4.2.3.2.2]

2025 CALIFORNIA PLUMBING CODE 409

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APPENDIX E

E 402.4.2 Meter Shutoff Valve or Cock. All gas meter installations shall be provided with shutoff valves or cocks located adjacent to and on the inlet side of the meters. In the case of a single meter installation utilizing an LP-Gas container, the container service valve shall be permitted to be used in lieu of the shutoff valve or cock. All gas meter installations shall be provided with test tees located adjacent to and on the outlet side of the meters.

[NFPA 501A:4.2.4.1 – 4.2.4.3]

E 403.0 Multiple Manufactured Home Site Fuel Dis- tribution and Supply Systems.

E 403.1 Manufactured Home Community LP-Gas Supply Systems. Where 10 or more customers are served by one LP-Gas supply system, the installation of the gas supply system shall be in accordance with 49 CFR 192. Other types of liquefied petroleum gas supply systems and the storage and handling of LP-Gas shall be in accordance with NFPA 58 (See also Section E 403.10). [NFPA 501A:4.3.2.1 – 4.3.2.2]

E 403.2 Required Gas Supply. The minimum hourly volume of gas required at each manufactured home site outlet or any section of the manufactured home community gas piping system shall be calculated as shown in Table E 403.2.

In extreme climate areas, additional capacities other than those in Table E 403.2 shall be considered. [NFPA 501A:4.3.4.1 – 4.3.4.2]

TABLE E 403.2

DEMAND FACTORS FOR USE IN CALCULATING GAS PIPING

SYSTEMS IN MANUFACTURED HOME COMMUNITIES

[NFPA 501A: TABLE 4.3.4.1]
CPC § 309.0 Medium relevance — show source text
2025 CALIFORNIA PLUMBING CODE 469

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IS 33

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

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

Chapter 3 General Regulations

309.0 Workmanship

312.0 Protection of Piping, Materials, and Struc tures

313.0 Hangers, Supports, and Anchors

314.0 Trenching, Excavation, and Backfill

Chapter 6 Water Supply and Distribution

604.0 Materials (water piping)

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

605.4 Ductile Iron Pipe and Joints

605.12 PVC Plastic Pipe and Joints

605.16.2 Plastic Pipe to Other Materials

609.0 Installation, Testing, Unions, and Location

Abbreviations

IAPMO International Association of Plumbing and Mechanical Officials

UPC Uniform Plumbing Code published by IAPMO

AWWA American Water Works Association

CSA Canadian Standards Association

Applicable Standards.

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

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

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

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

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

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

AWWA C110 Ductile Iron and Gray-Iron Fittings

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

AWWA C151 Ductile-Iron Pipe, Centrifugally Cast

AWWA C153 Ductile-Iron Compact Fitting

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

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

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

IAPMO/

ANSI UPC-1 Uniform Plumbing Code

470 2025 CALIFORNIA PLUMBING CODE

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CPC § 607.2 Medium relevance — show source text
607.2 Private Well Water Tanks . . . . . . .154

607.3 Potable Water Tanks . . . . . . . . . .154

607.4 Venting . . . . . . . . . . . . . . . . . . . . .154

607.5 Overflow . . . . . . . . . . . . . . . . . . . .154

607.6 Valves . . . . . . . . . . . . . . . . . . . . . .154

608.0 Water Pressure, Pressure Regulators, Pressure Relief Valves, and Vacuum Relief

Valves . . . . . . . . . . . . . . . . . . . . . .154

608.1 Inadequate Water Pressure . . . . .154

608.2 Excessive Water Pressure . . . . . .154

608.3 Expansion Tanks, and Combination Temperature and Pressure-Relief Valves . . . . .154

608.4 Pressure Relief Valves . . . . . . . . .154

608.5 Discharge Piping . . . . . . . . . . . . .154

608.6 Water-Heating Devices . . . . . . . . .155

608.7 Vacuum Relief Valves . . . . . . . . .155

609.0 Installation, Testing, Unions, and Location . . . . . . . . . . . . . . . . .155

609.1 Installation . . . . . . . . . . . . . . . . . .155

609.2 Trenches . . . . . . . . . . . . . . . . . . . .155

609.3 Under Concrete Slab . . . . . . . . . .155

609.4 Testing . . . . . . . . . . . . . . . . . . . . .155

609.5 Unions . . . . . . . . . . . . . . . . . . . . .155

609.6 Location . . . . . . . . . . . . . . . . . . . .155

609.7 Abutting Lot . . . . . . . . . . . . . . . . .155

609.8 Pumps . . . . . . . . . . . . . . . . . . . . .155

609.9 Low-Pressure Cutoff Required on Booster Pumps for Water Distribution Systems . . . . . . . . . . .156

2025 CALIFORNIA PLUMBING CODE xxxiii

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TABLE OF CONTENTS

609.10 Disinfection of Potable Water System . . . . . . . . . . . . . . . . . . . . .156

609.11 Water Hammer . . . . . . . . . . . . . . .156

609.12 Pipe Insulation . . . . . . . . . . . . . . .156

610.0 Size of Potable Water Piping . . . .156

610.1 Size . . . . . . . . . . . . . . . . . . . . . . . .156

610.2 Pressure Loss . . . . . . . . . . . . . . . .156

610.3 Quantity of Water . . . . . . . . . . . . .157

Frequently asked questions

Can I use a union on a gas line anywhere?

Only where the CPC permits: § 315.1 allows unions generally but for gas piping their use is governed by § 1212.6. The exact restrictions in § 1212.6 were not included in the files I retrieved here, so check § 1212.6 in your CPC copy or with the AHJ before installing.

Are field‑assembled anodeless risers allowed?

Yes — but only if the service‑head adapter / field‑assembled riser is manufacturer‑recommended for the gas used, design‑certified to Category I of ASTM D2513 and 49 CFR 192.281(e), and comes with the manufacturer's qualified installation instructions per 49 CFR 192.283(b) (§ 1208.5.6.2).

When must I use a dielectric union?

Use a dielectric union when joining dissimilar metals where required by the code or manufacturer; dielectric unions must comply with ASSE 1079 or IAPMO PS 66 (§ 605.15).

Are PE fittings allowed on gas services?

Yes — polyethylene (PE) pipe, tubing and fittings used to supply fuel gas must conform to ASTM D2513 and be marked for gas; follow the manufacturer’s installation and the CPC rules (see § 1208.5.4).

What should I do if I can’t find the text of § 1212.6 in my copy of the CPC?

Confirm with your jurisdiction’s adopted edition or the AHJ. The CPC links gas unions to § 1212.6 (see § 315.1) but the full wording of § 1212.6 was not present in the files returned to me; do not rely on assumptions — verify the exact local rule.

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