Ch. 13 Fuel Gas Piping — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Sections in this part
- 1301.1 Applicability.
- 1302.1 General.
- 1302.2 Piping System Requirements.
- 1302.3 Applications.
- 1303.1 Inspection Notification.
- 1303.2 Excavation.
- 1303.3 Type of Inspections.
- 1303.4 Inspection Waived.
- 1304.1 Issuance.
- 1304.2 Gas Supplier.
- 1304.3 Unlawful.
- 1305.1 Authorized Personnel.
- 1305.2 Outlets.
- 1306.1 Disconnection.
- 1306.2 Notice.
- 1306.3 Capped Outlets.
- 1307.1 General.
- 1308.1 Installation of Piping System.
- 1308.2 Interconnections Supplying Separate Users.
- 1308.3 Sizing of Gas Piping Systems.
- 1308.4 Acceptable Piping Materials and Joining Methods.
- 1308.5 Gas Meters.
- 1308.6 Gas Pressure Regulators.
- 1308.7 Overpressure Protection.
- 1308.8 Pressure Limitation Requirements.
- 1308.9 Overpressure Protection Devices.
- 1308.10 Backpressure Protection.
- 1308.11 Low-Pressure Protection.
- 1308.12 Shutoff Valves.
- 1308.13 Expansion and Flexibility.
- 1308.14 Pressure Regulator and Pressure Control Venting.
- 1309.1 General.
- 1310.1 Piping Underground.
- 1310.2 CSST Piping Systems.
- 1310.3 Installation of Aboveground Piping.
- 1310.4 Concealed Piping in Buildings.
- 1310.5 Piping in Vertical Chases.
- 1310.6 Maximum Operating Pressure in Buildings.
- 1310.7 Appliance Overpressure Protection.
- 1310.8 Gas Pipe Turns.
- 1310.9 Drips and Sediment Traps.
- 1310.10 Outlets.
- 1310.11 Manual Gas Shutoff Valves.
- 1310.12 Prohibited Devices.
- 1310.13 Systems Containing Gas-Air Mixtures Outside the Flammable Range.
- 1310.14 Systems Containing Flammable Gas-Air Mixtures.
- 1311.1 Pipe and Tubing Other than CSST.
- 1311.2 Bonding of CSST Gas Piping.
- 1311.3 Arc-Resistant Jacketed CSST.
- 1311.4 Prohibited Use.
- 1311.5 Lightning Protection System.
- 1311.6 Electrical Circuits.
- 1311.7 Electrical Connections.
- 1312.1 Connecting Appliances and Equipment.
- 1312.2 Suspended Low-Intensity Infrared Tube Heaters.
- 1312.3 Use of Nonmetallic Gas Hose Connectors.
- 1312.4 Injection (Bunsen) Burners.
- 1312.5 Connection of Portable and Mobile Industrial Appliances.
- 1312.6 Appliance Shutoff Valves and Connections.
- 1312.7 Quick-Disconnect Devices.
- 1312.8 Gas Convenience Outlets.
- 1312.9 Sediment Trap.
- 1312.10 Installation of Piping.
- 1312.11 Liquefied Petroleum Gas (LP-Gas) Facilities and Piping.
- 1313.1 Piping Installations.
- 1313.2 Test Preparation.
- 1313.3 Test Pressure.
- 1313.4 Detection of Leaks and Defects.
- 1313.5 Piping System Leak Test.
- 1313.6 Purging Requirements.
- 1314.1 General.
- 1314.2 Volume.
- 1314.3 Gas Appliances.
- 1314.4 Size of Piping Outlets.
- 1315.1 Pipe Sizing Methods.
- 1315.2 Sizing of Gas Piping Systems.
- 1315.3 Sizing Equations.
- 1315.4 Sizing of Piping Sections.
- 1315.5 Engineering Methods.
- 1315.6 Variable Gas Pressures.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) Chapter 13 · Effective January 1, 2026 · Official source: Building Standards Commission
(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-CG | SFM | HCD 1 | HCD 2 | HCD 1-AC | DSA AC | DSA SS | DSA SS/CC | OSHPD 1 | OSHPD 1R | OSHPD 2 | OSHPD 3 | OSHPD 4 | OSHPD 5 | OSHPD 6 | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 below | ||||||||||||||||||||||||
| Chapter/ |
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.
CHAPTER 13
FUEL GAS PIPING
1301.0 Scope of Gas Piping.¶
1302.0 Coverage of Piping System.¶
1303.0 Inspection.¶
1304.0 Certificate of Inspection.¶
1305.0 Authority to Render Gas Service.¶
1306.0 Authority to Disconnect.¶
1307.0 Temporary Use of Gas.¶
1308.0 Gas Piping System Design, Materials, and Components.¶
Components.
1309.0 Excess Flow Valve.¶
1310.0 Gas Piping Installation.¶
1311.0 Electrical Bonding and Grounding.¶
1312.0 Appliance and Equipment Connections to Building Piping.¶
Building Piping.
1313.0 Pressure Testing, Inspection, and Purging.¶
1314.0 Required Gas Supply.¶
1315.0 Required Gas Piping Size.¶
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