CPC · California Plumbing Code
Scope & coverage of fuel gas piping
This hub summarizes which fuel gas piping installations the California Plumbing Code regulates, where coverage begins and ends, and the primary sections to consult.
Last reviewed: July 6, 2026
Overview
The California Plumbing Code’s Fuel Gas Piping chapter sets the regulatory framework for installing fuel gas piping in and connected to buildings and on premises, covering natural gas (up to 5 psi) and undiluted propane (up to 10 psi) other than service pipe, as stated in §1201.1 . This chapter is the starting point for determining whether a piping installation falls under the CPC and which technical rules apply.
Coverage of the piping system runs from the point of delivery to the appliance connections; the code explicitly defines the point of delivery and requires that piping design, materials, fabrication, installation, testing, inspection, operation, and maintenance be addressed in the chapter (see §1202.1–§1202.2) . Practical technical provisions—such as acceptable piping materials and joining methods, regulator vent piping, sizing, and purging procedures—are found in the chapter’s later sections (for example, §1208.5 and the purge rules in §1213.6.1) .
The chapter also lists specific applications that are excluded from its scope (portable LP-Gas appliances, many industrial processes, LNG installations, utility distribution equipment, vehicle systems, etc.), and sets out inspection and certification requirements (see §1202.3 and §1203.0) . Use these sections to quickly decide applicability before diving into installation detail.
In this section
Code references
Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:
CPC § 1201.0 High relevance — show source text
1201.0 General.
1201.1 Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane, other than service pipe. Fuel oil piping systems connected to oil- burning equipment shall be installed in accordance with NFPA 31. Fuel oil piping systems connected to internal com- bustion engines and gas turbines shall be installed in accor- dance with NFPA 37.
1202.0 Coverage of Piping System. 1202.1 General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter.
[NFPA 54:1.1.1.1(A)] 1202.2 Piping System Requirements. Requirements for piping systems shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. [NFPA 54:1.1.1.1(E)] 1202.3 Applications. This chapter shall not apply to the following items:
(1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system.
(2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural
purposes.
(3) Raw material (feedstock) applications except for piping to special atmosphere generators.
(4) Oxygen-fuel gas cutting and welding systems.
(5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.
(6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants.
(7) Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions.
(8) LP-Gas installations at utility gas plants.
(9) Liquefied natural gas (LNG) installations.
(10)Fuel gas piping in electric utility power plants.
(11)Proprietary items of equipment, apparatus, or instruments such as gas-generating sets, compressors, and calorimeters.
(12)LP-Gas equipment for vaporization, gas mixing, and gas manufacturing.
(13)LP-Gas piping for buildings under construction or renovations that is not to become part of the permanent building piping system—that is, temporary fixed piping for building heat.
(14)Installation of LP-Gas systems for railroad switch heating.
(15)Installation of LP-Gas and compressed natural gas (CNG) systems on vehicles.
(16)Gas piping, meters, gas pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas.
CPC § 1201.1 High relevance — show source text
8_||||||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1201.1
1211.8||||||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1201.1
1211.8|||X|||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1201.1
1211.8|||X|||||X|X||||||||||||||||This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
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CHAPTER 12
FUEL GAS PIPING
1201.0 General.
1201.1 Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane, other than service pipe. Fuel oil piping systems connected to oil- burning equipment shall be installed in accordance with NFPA 31. Fuel oil piping systems connected to internal com- bustion engines and gas turbines shall be installed in accor- dance with NFPA 37.
1202.0 Coverage of Piping System. 1202.1 General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter.
[NFPA 54:1.1.1.1(A)] 1202.2 Piping System Requirements. Requirements for piping systems shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. [NFPA 54:1.1.1.1(E)] 1202.3 Applications. This chapter shall not apply to the following items:
CPC § 1.11.0. High relevance — show source text
This state agency does not adopt sections identified with the following symbol: † The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
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CHAPTER 13
FUEL GAS PIPING
1301.0 Scope of Gas Piping.
1301.1 Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane, other than service pipe.
1302.0 Coverage of Piping System.
1302.1 General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter.
[NFPA 54:1.1.1.1(A)]
1302.2 Piping System Requirements. Requirements for piping systems shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. [NFPA 54:1.1.1.1(E)]
1302.3 Applications. This chapter shall not apply to the following items:
(1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system.
(2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural
purposes.
(3) Raw material (feedstock) applications except for piping to special atmosphere generators.
(4) Oxygen-fuel gas cutting and welding systems.
(5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.
(6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants.
(7) Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions.
(8) LP-Gas installations at utility gas plants.
(9) Liquefied natural gas (LNG) installations.
(10)Fuel gas piping in electric utility power plants.
(11)Proprietary items of equipment, apparatus, or instruments such as gas-generating sets, compressors, and calorime ters.
(12)LP-Gas equipment for vaporization, gas mixing, and gas manufacturing.
CPC § 304.8 High relevance — show source text
NOMINAL PIPING SIZE
(inches)LENGTH OF PIPING
(feet)
≥ 21⁄2 < 3> 50
≥ 3 < 4> 30
≥ 4 < 6> 15
≥ 6 < 8> 10
≥ 8Any length For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm
- CSST EHD size of 62 is equivalent to nominal 2 inches (50 mm) pipe or tubing size.
1213.6.1.1 Removal from Service. Where existing gas piping is opened, the section that is opened shall be isolated from the gas supply and the line pressure vented in accordance with Section 1213.6.1.4. Where gas piping meeting the criteria of Table 1213.6.1 is removed from service, the residual fuel gas in the piping shall be displaced with an inert gas. [NFPA 54:8.3.1.1]
1213.6.1.2 Removal of Piping. Where piping containing gas is to be removed, the line shall be first disconnected from sources of gas and then thoroughly purged with air, water, or inert gas before cutting, or welding is done.
1213.6.1.3 Placing in Operation. Where gas piping containing air and meeting the criteria of Table
TABLE 1213.6.1
SIZE AND LENGTH OF PIPING
[NFPA 54: TABLE 8.3.1]*
For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm
- CSST EHD size of 62 is equivalent to nominal 2 inches (50 mm) pipe or tubing size.
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FUEL GAS PIPING
1213.6.1 is placed in operation, the air in the piping shall first be displaced with an inert gas. The inert gas shall then be displaced with fuel gas in accordance with Section 1213.6.1.4. [NFPA 54:8.3.1.2]
1213.6.1.4 Outdoor Discharge of Purged Gases. The open end of a piping system being pressure vented or purged shall discharge directly to an outdoor location. Purging operations shall comply with all of the following requirements:
(1) The point of discharge shall be controlled with a shutoff valve.
(2) The point of discharge shall be located at least 10 feet (3048 mm) from sources of ignition, at least 10 feet (3048 mm) from building openings and at least 25 feet (7620 mm) from mechanical air intake openings.
(3) During discharge, the open point of discharge shall be continuously attended and monitored with a combustible gas indicator that complies with Section 1213.6.1.5.
(4) Purging operations introducing fuel gas shall be stopped when 90 percent fuel gas by volume is detected within the pipe.
CPC § 1.1.1.2 High relevance — show source text
(1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system.
(2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural
purposes.
(3) Raw material (feedstock) applications except for piping to special atmosphere generators.
(4) Oxygen-fuel gas cutting and welding systems.
(5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.
(6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants.
(7) Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions.
(8) LP-Gas installations at utility gas plants.
(9) Liquefied natural gas (LNG) installations.
(10)Fuel gas piping in electric utility power plants.
(11)Proprietary items of equipment, apparatus, or instruments such as gas-generating sets, compressors, and calorimeters.
(12)LP-Gas equipment for vaporization, gas mixing, and gas manufacturing.
(13)LP-Gas piping for buildings under construction or renovations that is not to become part of the permanent building piping system—that is, temporary fixed piping for building heat.
(14)Installation of LP-Gas systems for railroad switch heating.
(15)Installation of LP-Gas and compressed natural gas (CNG) systems on vehicles.
(16)Gas piping, meters, gas pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas.
(17)Building design and construction, except as specified herein.
(18)Fuel gas systems on recreational vehicles manufactured in accordance with NFPA 1192.
(19)Fuel gas systems using hydrogen as a fuel.
(20)Construction of appliances. {NFPA 54:1.1.1.2}
1203.0 Inspection.
1203.1 Inspection Notification. Upon completion of the installation, alteration, or repair of gas piping, and prior to the use thereof, the Authority Having Jurisdiction shall be notified that such gas piping is ready for inspection.
1203.2 Excavation. Excavations required for the installation of underground piping shall be kept open until the piping has been inspected and approved. Where such piping is covered or concealed before such approval, it shall be exposed upon the direction of the Authority Having Jurisdiction.
1203.3 Type of Inspections. The Authority Having Jurisdiction shall make the following inspections and either shall approve that portion of the work as completed or shall notify the permit holder wherein the same fails to be in accordance with this code.
1203.3.1 Rough Piping Inspection. This inspection shall be made after gas piping authorized by the permit has been installed and before such piping has been covered or concealed or fixture or appliance has been attached thereto. This inspection shall include a determination that the gas piping size, material, and installation meet the requirements of this code.
1203.3.2 Final Piping Inspection. This inspection shall be made after piping authorized by the permit has been installed, and after portions, thereof that are to be covered or concealed are so concealed, and before fixture, appliance, or shutoff valve has been attached thereto.
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CPC § 1105.1 High relevance — show source text
Table 1105.1(2) Distance of Scupper Bottoms Above Roof . . . . . . . . . . . . . . . . . .209
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TABLE OF CONTENTS
1105.2 Setback Roofs . . . . . . . . . . . . . . .209
1106.0 Engineered Storm Drainage System . . . . . . . . . . . . . . . . . . . . .209
1106.1 General . . . . . . . . . . . . . . . . . . . . .209
1106.2 Siphonic Roof Drainage Systems . . . . . . . . . . . . . . . . . . . .209
1106.3 Siphonic Roof Drains . . . . . . . . . .209
1107.0 Testing . . . . . . . . . . . . . . . . . . . . .209
1107.1 Testing Required . . . . . . . . . . . . .209
1107.2 Methods of Testing Storm Drainage Systems . . . . . . . . . . . .209
Table 1103.2 Sizing of Horizontal Rainwater Piping . . . . . . . . . . . . .210
Table 1103.3 Size of Gutters . . . . . . . . . . . . . . .211
CHAPTER 12 FUEL GAS PIPING . . . . . . . . . . .213
1201.0 General . . . . . . . . . . . . . . . . . . . . .215
1201.1 Applicability . . . . . . . . . . . . . . . . . .215
1202.0 Coverage of Piping System . . . . .215
1202.1 General . . . . . . . . . . . . . . . . . . . . .215
1202.2 Piping System Requirements . . . .215
1202.3 Applications . . . . . . . . . . . . . . . . .215
1203.0 Inspection . . . . . . . . . . . . . . . . . . .215
1203.1 Inspection Notification . . . . . . . . .215
1203.2 Excavation . . . . . . . . . . . . . . . . . .215
1203.3 Type of Inspections . . . . . . . . . . .215
1203.4 Inspection Waived . . . . . . . . . . . .216
1204.0 Certificate of Inspection . . . . . . . .216
1204.1 Issuance . . . . . . . . . . . . . . . . . . . .216
1204.2 Gas Supplier . . . . . . . . . . . . . . . . .216
1204.3 Unlawful . . . . . . . . . . . . . . . . . . . .216
1205.0 Authority to Render Gas Service . . . . . . . . . . . . . . . . . . . . .216
1205.1 Authorized Personnel . . . . . . . . . .216
CPC § 1201.0 Medium relevance — show source text
1201.0 General . . . . . . . . . . . . . . . . . . . . .215
1201.1 Applicability . . . . . . . . . . . . . . . . . .215
1202.0 Coverage of Piping System . . . . .215
1202.1 General . . . . . . . . . . . . . . . . . . . . .215
1202.2 Piping System Requirements . . . .215
1202.3 Applications . . . . . . . . . . . . . . . . .215
1203.0 Inspection . . . . . . . . . . . . . . . . . . .215
1203.1 Inspection Notification . . . . . . . . .215
1203.2 Excavation . . . . . . . . . . . . . . . . . .215
1203.3 Type of Inspections . . . . . . . . . . .215
1203.4 Inspection Waived . . . . . . . . . . . .216
1204.0 Certificate of Inspection . . . . . . . .216
1204.1 Issuance . . . . . . . . . . . . . . . . . . . .216
1204.2 Gas Supplier . . . . . . . . . . . . . . . . .216
1204.3 Unlawful . . . . . . . . . . . . . . . . . . . .216
1205.0 Authority to Render Gas Service . . . . . . . . . . . . . . . . . . . . .216
1205.1 Authorized Personnel . . . . . . . . . .216
1205.2 Outlets . . . . . . . . . . . . . . . . . . . . .216
1206.0 Authority to Disconnect . . . . . . . .216
1206.1 Disconnection . . . . . . . . . . . . . . . .216
1206.2 Notice . . . . . . . . . . . . . . . . . . . . . .216
1206.3 Capped Outlets . . . . . . . . . . . . . . .216
1207.0 Temporary Use of Gas . . . . . . . . .216
1207.1 General . . . . . . . . . . . . . . . . . . . . .216
1208.0 Gas Piping System Design, Materials, and Components . . . . .216
1208.1 Installation of Piping System . . . .216
1208.2 Interconnections Supplying Separate Users . . . . . . . . . . . . . . .216
1208.3 Sizing of Gas Piping Systems . . .216
Table 1208.3.1 Approximate Gas Input for Typical Appliances . . . . . . . . . . . .217
1208.4 Maximum Operating Pressure in Buildings . . . . . . . . . . . . . . . . . .217
1208.5 Acceptable Piping Materials and Joining Methods . . . . . . . . . .217
Table 1208.5.8.2 Specifications for Threading Metallic Pipe . . . . . . . . . . . . . . . . .219
CPC § 302.7.1 Medium relevance — show source text
E 302.7.1 Approval. Regenerating water-conditioning equipment shall be listed and labeled by an approved listing agency.
E 302.7.2 Installation. Regenerating units shall discharge the effluent of regeneration into a trap not less than 1 [1] ⁄ 2 inches (40 mm) in diameter connected to the manufactured home park drainage system. An approved air gap shall be installed on the discharge line a minimum of 12 inches (305 mm) above the ground.
E 302.8 Testing. Installations shall be tested and inspected in accordance with Chapter 3 of this code.
E 401.0 Fuel Supply.
E 401.1 Fuel Gas Piping Systems. All fuel gas piping systems serving manufactured homes, accessory buildings, or structures and communities shall be designed and constructed in accordance with any applicable provisions of NFPA 54 and NFPA 58. NFPA 31 shall apply to oil fuel-burning systems and shall conform to the criteria of the Authority Having Jurisdiction. [NFPA 501A:4.1.1.1 – 4.1.1.2]
E 401.2 Gas Supply Connections. Gas supply connections at sites, where provided from an underground gas supply piping system, shall be located and arranged to permit attachment to a manufactured home occupying the site.
For the installation of liquefied petroleum gas (LP-Gas) storage systems, the provisions of NFPA 58 shall be followed. [NFPA 501A:4.1.2.1 – 4.1.2.2]
E 401.3 Location of Gas Supply Connection. The gas supply to the manufactured home shall be located within 4 feet (1219 mm) of the manufactured home stand.
Exception: The requirement of Section E 401.3 shall not apply to gas supply connections for manufactured homes located on all-weather wood, concrete, or concrete block foundation systems or on foundations constructed in accordance with the local building code or, in the absence of a local code, with a recognized model building code. [NFPA 501A:4.1.3]
E 401.4 Recreational Vehicle Park Fuel Gas Equip- ment and Installations. Fuel gas equipment and installations shall comply with this appendix, except as otherwise permitted or required by this code.
E 402.0 Single and Multiple Manufactured Home Site Fuel Supply Systems.
E 402.1 Underground Installations. Underground gas piping system installations shall comply with any applicable building code, Section E 402.2 and Section E 402.2.1. [NFPA 501A:4.2.1]
E 402.2 Open-Ended Gastight Conduit. Underground gas piping shall not be installed beneath that portion of a manufactured home site reserved for the location of a manufactured home or manufactured home accessory building or structure unless installed in the open-ended gastight conduit of Section E 402.2.1. [NFPA 501A:4.2.1.1]
E 402.2.1 Requirements. The open-ended gastight conduit shall conform to the requirements in the following:
(1) The conduit shall be not less than Schedule 40 pipe that is approved for underground installation beneath buildings.
(2) The interior diameter of the conduit shall be not less than [1] ⁄ 2 of an inch (15 mm) larger than the outside diameter of the gas piping.
CPC § 0.293 Medium relevance — show source text
automatic storage
30 to 40 gallon tank
Water heater, automatic storage
50 gallon tank
Water heater, automatic instantaneous
Capacity at 2 gallons per minute
Capacity at 4 gallons per minute
Capacity at 6 gallons per minute
Water heater, domestic, circulating or
side-arm|
35 000
50 000
142 800
285 000
428 400
35 000| |
Cooking Appliances
Range, freestanding, domestic
Built-in oven or broiler unit, domestic
Built-in top unit, domestic|
65 000
25 000
40 000| |
Other Appliances
Refrigerator
Clothes dryer, Type 1 (domestic)
Gas fireplace direct-vent
Gas log
Barbecue
Gaslight|
3000
35 000
40 000
80 000
40 000
2500|For SI units: 1000 British thermal units per hour = 0.293 kW
1208.3.2 Sizing Methods. Gas piping shall be sized in accordance with one of the following:
(1) Pipe sizing tables or sizing equations in this chap ter.
(2) Sizing tables included in a listed piping system manufacturer’s installation instructions.
(3) Engineering methods. [NFPA 54:5.3.3]
1208.3.3 Allowable Pressure Drop. The design pressure loss in a piping system from the point of delivery to
TABLE 1208.3.1
APPROXIMATE GAS INPUT FOR
TYPICAL APPLIANCES
[NFPA 54: TABLE A.5.3.2.1]
«
«
«
«
«
For SI units: 1000 British thermal units per hour = 0.293 kW
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FUEL GAS PIPING
«
«
«
«
«
«
«
«
«
«
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}
CPC § 1.11.0. Medium relevance — show source text
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1-AC AC ** SS** ** SS/CC** 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter X X X X X X X X X X X X Adopt Entire Chapter as
amended (amended sections
listed below)Adopt only those sections
that are listed belowChapter/Section This state agency does not adopt sections identified with the following symbol: † The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
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CHAPTER 13
FUEL GAS PIPING
1301.0 Scope of Gas Piping.
1301.1 Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane, other than service pipe.
1302.0 Coverage of Piping System.
CPC § 1220.1 Medium relevance — show source text
1220.1 Use of Chemical Additives
and Corrosive Fluids. . . . . . . . . . . 269
1220.2 Types of Tube Fasteners . . . . . . . 269
1220.3 Spacing of Tube Fasteners . . . . . 269
1220.4 Snow and Ice Melt Controls . . . . . 269
Table 1220.4.2 Maximum Loop Lengths for Snow and Ice Melt Systems . . . . . 270
1220.5 Hydronic Makeup Air Units . . . . . . 270
1221.0 Piping Installation . . . . . . . . . . . . . 270
1221.1 General. . . . . . . . . . . . . . . . . . . . . 270
1221.2 Embedded Piping Materials and Joints . . . . . . . . . . . . . . . . . . . 270
1221.3 Pressure Testing . . . . . . . . . . . . . 270
1221.4 System Drainage . . . . . . . . . . . . . 270
1221.5 Condensate Drainage. . . . . . . . . . 271
1221.6 Hydronic Fluid Disposal . . . . . . . . 271
1221.7 Clearance to Combustibles . . . . . 271
CHAPTER 13 FUEL GAS PIPING . . . . . . . . . . . 273
1301.0 Scope of Gas Piping . . . . . . . . . . 275
1301.1 Applicability. . . . . . . . . . . . . . . . . . 275
1302.0 Coverage of Piping System . . . . . 275
1302.1 General. . . . . . . . . . . . . . . . . . . . . 275
1302.2 Piping System Requirements . . . . 275
1302.3 Applications . . . . . . . . . . . . . . . . . 275
1303.0 Inspection . . . . . . . . . . . . . . . . . . . 275
1303.1 Inspection Notification . . . . . . . . . 275
1303.2 Excavation . . . . . . . . . . . . . . . . . . 275
1303.3 Type of Inspections . . . . . . . . . . . 275
1303.4 Inspection Waived . . . . . . . . . . . . 276
1304.0 Certificate of Inspection . . . . . . . . 276
1304.1 Issuance . . . . . . . . . . . . . . . . . . . . 276
1304.2 Gas Supplier. . . . . . . . . . . . . . . . . 276
1304.3 Unlawful . . . . . . . . . . . . . . . . . . . . 276
1305.0 Authority to Render Gas Service . . 276
1305.1 Authorized Personnel . . . . . . . . . . 276
1305.2 Outlets . . . . . . . . . . . . . . . . . . . . . 276
1306.0 Authority to Disconnect. . . . . . . . . 276
CPC § 4.2.1 Medium relevance — show source text
1101.4.2.1, 1104.4.2.2
AIR GAPS
Backflow prevention . . . . . . 603.2, Table 603.2, 603.3.1, Table 603.3.1, 603.4.4
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0
Discharge from drinking
water treatment units . . . . . . . . . . . . . . . . . . . . . 611.2
AIR TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .710.11
ALTERATIONS AND REPAIRS
Fuel gas piping . . . . . . . . . . . .1203.1, 1213.1.2, 1213.4.2
Health care facilities . . . . . . . . . . . . . . . . . . . . . . .1301.5
Plumbing systems . . . . . . . . . . . . . . . . . .102.4, 301.2.5 ALTERNATE MATERIALS, DESIGN,
AND METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.3
ALTERNATE WATER SOURCE
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.0
For nonpotable applications . . .Chapter 15, Chapter 16 For special water features . . . . . . . . . . . . . . . . .L 406.1
Future connections . . . . . . . . . . . . . . . . . . . . .1504.9.1
Identification of piping . . . . . . . . . . . . . . . . . . . . .601.3.3 Nonpotable rainwater catchment system . . . . . . . . . . .Table 1601.5, 1602.4
Potable rainwater
catchment system . . . . . . . . . . . . . . . . . . . . . .K 102.2 ANODELESS RISER, DEFINITION . . . . . . . . . . . . . . .203.0
APPLIANCES
Automatically operated . . . . . . . . . . . .509.3.4, 509.5.7.1 Categorized vent diameter/area, definition . . . . . . . . . . . . . . . . . .203.0 Connections to building fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . . .1212.0
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.0
Direct-vent . . . . . . . . . . . . . . . .206.0, 509.2.6, 509.5.10.1,
509.8.1, 509.12
2025 CALIFORNIA PLUMBING CODE 563
Frequently asked questions
What installations are governed by the CPC fuel gas piping chapter?
Installations of fuel gas piping in or in connection with buildings and on premises up to 5 psig for natural gas and 10 psig for undiluted propane (other than service pipe) are governed by §1201.1 .
Where does “coverage” of the piping system begin and end?
Coverage extends from the point of delivery (as defined in §1202.1) to the appliance connections; the chapter also prescribes design, materials, testing, inspection, operation, and maintenance requirements .
Are there common exclusions I should watch for?
Yes—portable LP‑Gas appliances, many industrial gas uses, LNG installations, utility distribution piping, vehicle fuel systems, and similar items are excluded per §1202.3; check that section before applying the chapter’s rules .
More in California Plumbing Code
- Administration
- Definitions
- General Regulations
- Plumbing Fixtures and Fixture Fittings
- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage (Drain, Waste, and Vent)
- Indirect Wastes
- Vents
- Traps and Interceptors
- Storm Drainage
- Fuel Gas Piping
- Health Care Facilities — Medical Gas and Medical Vacuum Systems
- Alternate Water Sources and Nonpotable Rainwater Catchment Systems
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