CRSC · California Referenced Standards Code

Residential excess‑flow actuated gas shutoff valves (California standard)

For homeowners: California’s Referenced Standards Code (Standard 12‑16‑2) requires residential excess‑flow gas shutoff valves to be tested/certified to specified national standards (ASTM F2138 or ANSI Z21.93/CSA 6.30 for pressures up to 5 psig) and to be installed according to the California Plumbing Code; pick a valve listed to those standards and follow the manufacturer and Plumbing Code for sizing and installation.

Ask a question free See coverage

Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The California Referenced Standards Code requires that residential excess‑flow actuated automatic gas shutoff valves be certified to the national test/specification standards ASTM F2138‑12(2017) and ANSI Z21.93‑2017 / CSA 6.30‑2017 (for pressures up to 5 psig). The referenced standards are the standards the Division of the State Architect uses for device certification — see § 12‑16‑201. Installations of customer‑owned devices that meet these standards must be done in accordance with the California Plumbing Code (CCR Title 24, Part 5) — see § 12‑16‑201.1.

The single most important requirement: use only excess‑flow valves certified to the listed standards (ASTM F2138 or ANSI Z21.93/CSA 6.30) and install them per the California Plumbing Code.

Requirements in detail

Applicable standard(s) and certification

  • The device must be manufactured and tested to the ASTM F2138‑12(2017) Standard Specification for Excess Flow Valves for Natural Gas Service or to ANSI Z21.93‑2017 / CSA 6.30‑2017 (the ANSI/CSA standard cited specifically for valves with pressure up to 5 psig). § 12‑16‑201 identifies these as the applicable standards used by the Division of the State Architect for certification.

Installation authority and scope

  • Any customer‑owned device that satisfies the above standard(s) must be installed in accordance with the California Plumbing Code (CCR Title 24, Part 5). This installation requirement is stated in § 12‑16‑201.1. The CRSC itself does not restate the Plumbing Code installation rules; it delegates installation requirements to the Plumbing Code.

Decision‑relevant dimensions and values

Use this quick table when deciding whether a particular excess‑flow valve and installation path meet the CRSC requirement.

Decision item What to check Typical value / threshold Code Reference
Required standards for certification Valve is manufactured/tested to one of the listed standards ASTM F2138‑12(2017) or ANSI Z21.93‑2017 / CSA 6.30‑2017 § 12‑16‑201
Maximum standardized pressure scope Valve standard explicitly covers valves for low‑pressure residential service Up to 5 psig (ANSI Z21.93 scope) § 12‑16‑201
Installation rules Follow the State Plumbing Code for siting, connections, supports, accessibility, and testing See California Plumbing Code (CCR Title 24, Part 5) § 12‑16‑201.1
Certification authority Which State agency reviews/certifies devices Division of the State Architect (DSA) uses the named standards for certification § 12‑16‑201

(Notes: the CRSC identifies the standards and the certifying agency and points to the Plumbing Code for installation; it does not itself provide valve‑sizing formulas, physical mounting dimensions, or wiring/electrical details. See the referenced standards and the Plumbing Code for those technical specifics.)

What the CRSC does NOT specify (so you must consult the standards / Plumbing Code)

  • The CRSC does not provide valve sizing methods, required set/closing flow values, mounting location, or exact installation details. Those technical specifications are contained in ASTM F2138, ANSI Z21.93/CSA 6.30, and the California Plumbing Code (as required by § 12‑16‑201 and § 12‑16‑201.1) — consult those documents for sizing, testing, and installation steps.

Exceptions & special cases

  • The CRSC text for this standard only defines the applicable certification standards and the requirement that installations conform to the California Plumbing Code; it does not list exceptions or identify classes of buildings that are excluded. If a local ordinance or another part of Title 24 requires a particular type of shutoff (for example, earthquake‑actuated systems), that requirement is separate — see related provisions below. The CRSC delegates installation details to the Plumbing Code (CCR Title 24, Part 5) per § 12‑16‑201.1.

  • If a device is not certified by the Division of the State Architect to the listed standards, it does not meet the CRSC certification requirement. The CRSC does not authorize use of uncertified devices for the purposes of this standard. § 12‑16‑201 is explicit about which standards are to be used by DSA for certification.

Common mistakes

  • Assuming the CRSC prescribes installation details (mounting height, pipe location, venting, or bonding). It does not — installation is per the California Plumbing Code as called out in § 12‑16‑201.1.
  • Selecting a valve that is not listed to ASTM F2138 or ANSI Z21.93/CSA 6.30 and assuming it meets the CRSC requirement. The CRSC requires those specific standards for DSA certification (§ 12‑16‑201).
  • Confusing excess‑flow actuated valves with earthquake‑actuated automatic shutoff systems; these are different CRSC standards (see related CRSC sections). Verify which device type the local ordinance or project requires.
  • Ignoring the pressure scope: installing a valve listed only for very low pressure when your system operates near or above the valve’s rated pressure. The ANSI standard cited in § 12‑16‑201 explicitly calls out the up to 5 psig scope for that standard.

Worked example — concrete scenario (numbers are illustrative; final sizing must follow ASTM/ANSI/manufacturer instructions)

Scenario: single‑family residence with a low‑pressure service. Measured service pressure at the appliance connection: 0.5 psi (about 14 in. w.c.). The homeowner wants a customer‑owned excess‑flow valve upstream of the appliance connector.

Step 1 — standards check:

  • Confirm the candidate valve is certified to ASTM F2138‑12(2017) or ANSI Z21.93‑2017 / CSA 6.30‑2017 (the ANSI/CSA standard covers valves for pressures up to 5 psig) — as required by § 12‑16‑201. If the valve is listed to one of those standards, it meets the CRSC certification standard requirement.

Step 2 — pressure rating check:

  • Confirm valve maximum rated working pressure ≥ actual system pressure. Example: system at 0.5 psi and the ANSI standard covers up to 5 psig, so a valve listed to ANSI Z21.93 (up to 5 psig) is acceptable from a pressure‑rating viewpoint per § 12‑16‑201.

Step 3 — flow/closing threshold (illustrative only):

  • Determine the residence’s expected normal maximum flow (sum of appliance demands). Suppose the normal maximum is 200 standard cubic feet per hour (scfh) (example number for illustration). Choose an excess‑flow valve whose continuous flow rating comfortably exceeds 200 scfh and whose closing (trip) flow threshold is higher than the normal maximum but low enough to stop flow in a service rupture (e.g., a closing threshold of 400 scfh). These sizing checks are done per ASTM F2138 / ANSI Z21.93 and the manufacturer’s instructions — the CRSC itself requires compliance with those standards but does not list the sizing numbers.

Step 4 — installation:

  • Install the selected, certified valve in accordance with the California Plumbing Code (CCR Title 24, Part 5) and the manufacturer’s installation instructions, as required by § 12‑16‑201.1. That includes proper orientation, supports, access for service, and any required testing.

Summary for this example: the device must be certified to the listed standard (§ 12‑16‑201), be suitable for actual system pressure (≤ the valve’s rating and within the ANSI scope of up to 5 psig), be sized per ASTM/ANSI/manufacturer guidance, and be installed per the California Plumbing Code (§ 12‑16‑201.1) — consult the referenced standards and manufacturer for final numeric sizing and test acceptance.

Related provisions

  • California Referenced Standards Code — California Standard for Earthquake‑Actuated Automatic Gas Shutoff Devices: § 12‑16‑101 and § 12‑16‑101.1 (separate CRSC standard for earthquake‑actuated devices).
  • California Plumbing Code (CCR Title 24, Part 5) — Excess Flow Valve provisions and general fuel‑gas installation requirements (see e.g., 1209.0 and 1209.1 in the Plumbing Code for excess‑flow valve guidance). The CRSC directs installations to the Plumbing Code in § 12‑16‑201.1.
  • California Mechanical Code — general note that excess flow valves must be listed to ANSI Z21.93/CSA 6.30 and sized/installed per manufacturer instructions (see Mechanical Code fuel‑gas chapter 1309.1 for parallel guidance). This is complementary regulatory text to the CRSC requirement to use the listed standards.

Code references

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

  • CRSC § 12-16 High relevance — show source text

    12-16-1 ENGINEERING REGULATIONS—QUALITY AND

    DESIGN OF THE MATERIALS OF CONSTRUCTION

    CALIFORNIA STANDARD FOR EARTHQUAKE-ACTUATED AUTOMATIC GAS SHUTOFF SYSTEMS (SEE CCR TITLE 24, PART 2, CHAPTERS 16 AND 16A, AND CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-1

    DIVISION OF THE STATE ARCHITECT

    Authority: Sections 19180–19183, Health and Safety Code. Reference: Section 19182, Health and Safety Code.

    DIVISION 1—CONSTRUCTION

    SCOPE

    Sec. 12-16-101. The American Society of Civil Engineers (ASCE) requirements for “Earthquake-Actuated Automatic Gas Shutoff Devices,” ANSI/ASCE/SEI 25-16 (copyright 2016 by ASCE), shall be the applicable standard used by the Division of the State Architect for the certification of these devices.

    Sec. 12-16-101.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).

    2025 CALIFORNIA REFERENCED STANDARDS CODE 101

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    102 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-16-2 ENGINEERING REGULATIONS—QUALITY AND

    DESIGN OF THE MATERIALS OF CONSTRUCTION

    CALIFORNIA STANDARD FOR RESIDENTIAL EXCESS FLOW ACTUATED AUTOMATIC GAS SHUTOFF VALVES (SEE CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-2

    DIVISION OF THE STATE ARCHITECT

    Authority: Sections 19200–19204, Health and Safety Code. Reference: Sections 19201.5 and 19202, Health and Safety Code.

    DIVISION 1—CONSTRUCTION

    SCOPE

    Sec. 12-16-201. The American Society for Testing and Materials (ASTM) F2138-12(2017) Standard Specification for Excess Flow Valves for Natural Gas Service, and the American National Standards Institute (ANSI) Z21.93-2017/CSA 6.30-2017 Excess Flow Valves for Natural and LP Gas with Pressure up to 5 psig, shall be the applicable standards used by the Division of the State Architect for certification of these devices.

    Sec. 12-16-201.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).

    2025 CALIFORNIA REFERENCED STANDARDS CODE 103

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    104 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-31C RADIATION SHIELDING STANDARDS

    STANDARD 12-31C-1

    DEPARTMENT OF HEALTH SERVICES

  • CRSC § 12-16 High relevance — show source text

    CALIFORNIA STANDARD FOR RESIDENTIAL EXCESS FLOW ACTUATED AUTOMATIC GAS SHUTOFF VALVES (SEE CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-2

    DIVISION OF THE STATE ARCHITECT

    Authority: Sections 19200–19204, Health and Safety Code. Reference: Sections 19201.5 and 19202, Health and Safety Code.

    DIVISION 1—CONSTRUCTION

    SCOPE

    Sec. 12-16-201. The American Society for Testing and Materials (ASTM) F2138-12(2017) Standard Specification for Excess Flow Valves for Natural Gas Service, and the American National Standards Institute (ANSI) Z21.93-2017/CSA 6.30-2017 Excess Flow Valves for Natural and LP Gas with Pressure up to 5 psig, shall be the applicable standards used by the Division of the State Architect for certification of these devices.

    Sec. 12-16-201.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).

    2025 CALIFORNIA REFERENCED STANDARDS CODE 103

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    104 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-31C RADIATION SHIELDING STANDARDS

    STANDARD 12-31C-1

    DEPARTMENT OF HEALTH SERVICES

    Authority: Sections 102, 208 and 25811.

    Reference: Sections 102, 208 and 436.5.

    ALL HEALING ARTS X-RAY INSTALLATIONS

    Sec. 12-31C-101. All radiation shielding barriers in rooms and enclosures housing radiation machines shall comply with the mandatory standards and appendices in Report No. 35, “Dental X-RAY Protection”; Report 49, “Structural Shielding Design and Evaluation for Medical use of X-rays and Gamma Rays of Energies up to 10 MeV”; and Report No. 51, “Radiation Protection Design Guidelines for 0.1-100 MeV Particle Accelerator Facilities.” Published by the National Council on Radiation Protection and Measurements, 7910 Woodmont Avenue, Bethesda, Maryland 20814.

    2025 CALIFORNIA REFERENCED STANDARDS CODE 105

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    106 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-71 AIR FILTERS

    STANDARD 12-71-1

    STATE FIRE MARSHAL

    DESCRIPTION OF TEST APPARATUS, METHOD AND CLASSIFICATION REQUIREMENTS FOR AIR FILTERS

    Sec. 12-71-100.

    (a) Test apparatus.

    1. The test duct, made of M.S. gage galvanized sheet metal reinforced with angle irons, is 21 inches square (13 548 mm [2] ) and 13 [1] / 2 feet (4114 mm) long.
  • CRSC § 12-7 High relevance — show source text

    Fire tests of building
    construction and materials.|SFM|Part 2, Section 703| |Chapter 12-7-2|Reserved||| |Chapter 12-7-3|Fire-resistive standards.
    Fire testing furnaces.|SFM|Part 9, Section 3001| |Chapter 12-7-4|Fire-resistive standards.
    Fire door assembly tests.|SFM|Part 2, Section 716| |Chapter 12-7-5|Fire-resistive standards. Interior
    finish of decorative material.|SFM|Part 2, Chapter 8
    Part 9, Chapter 8| |Chapter 12-7A|Materials and construction methods for
    exterior wildfire exposure|SFM|Part 7, Chapter 5| |Chapter 12-8-1|Fire-resistive standards for fire protection|SFM|Part 2, Sections 408.14 and 435.6.2| |Appendix 12-8-1A|Calculation of the total rate of heat and carbon
    monoxide or carbon dioxide production|SFM|| |Appendix 12-8-1B|Guide to mounting techniques for wall and
    ceiling interior finish material|SFM|| |Chapter 12-10-1|Exits. Power-operated exit doors.|SFM|Part 2, Sections 408.4.2, 1010.1.4.2, 1010.1.9.1| |Chapter 12-10-2|Exits. Single-point latching or locking devices.|SFM|Part 2, Section 1010.2.2
    Part 9, Section 1010.2.2| |Chapter 12-10-3|Exits. Emergency exit and panic hardware.
    |SFM|Part 9, Section 1009.12| |Chapter 12-11A,
    12-11B|Detectable warning products and directional
    surfaces|DSA|Part 2, Sections 1112A.9, 1116A.5, 11B-247,
    11B-406.5.12, 11B-705, 11B-810.5.2| |Chapter 12-12|Reserved||| |Chapter 12-13|Standards for insulating material|CA/SFM|Part 2.5, Section R302.10.1
    Part 6, Section 110.8
    Part 9, Section 720, Table 721.1(1)
    Part 11, Section A5.504.4.8| |Chapter 12-16-1|California standard for earthquake-actuated
    automatic gas shutoff systems|DSA|Part 2, Chapters 16 and 16A
    Part 5, Section 1211.8| |Chapter 12-16-2|California standard for residential excess flow
    actuated automatic gas shutoff valves|DSA|Part 5, Section 1209.1| |Chapter 12-31C|Radiation shielding|DPH|Part 2, Section 3102C| |Chapter 12-71|Air filters|SFM|Part 4, Sections 401.2, 509.2.3, 509.2.3.4
    Part 6, Section 120.1| |Chapter 12-72-1|Protective signaling systems.
    Standard test procedures.|SFM|| |Chapter 12-72-2|Protective signaling systems.

  • CRSC § 12.7 High relevance — show source text

    Where mounted on a concrete base, a means shall be provided and installed within [1] / 2 inch (12.7 mm) of the top of the concrete base that will prevent flow from the supply piping in the event that the dispenser is displaced from its mounting. 2. A manual shutoff valve and an excess flow-control check valve shall be located in the liquid line between the pump and the dispenser inlet where the dispensing device is installed at a remote location and is not part of a complete storage and dispensing unit mounted on a common base. 3. An excess flow-control check valve or an emergency shutoff valve shall be installed in or on the dispenser at the point at which the dispenser hose is connected to the liquid piping. 4. A listed automatic-closing type hose nozzle valve with or without a latch-open device shall be provided on island-type dispensers.

    2307.6.2 Hoses. Hoses and piping for the dispensing of LP-gas shall be provided with hydrostatic relief valves. The hose length shall not exceed 18 feet (5486 mm). An approved method shall be provided to protect the hose against mechanical damage.

    2307.6.3 Emergency breakaway devices. Dispenser hoses shall be equipped with a listed emergency breakaway device designed to retain liquid on both sides of the breakaway point. Where hoses are attached to hose-retrieving mechanisms, the emergency breakaway device shall be located such that the breakaway device activates to protect the dispenser from being displaced.

    2307.6.4 Vehicle impact protection. Where installed within 10 feet of vehicle traffic, LP-gas storage containers, pumps and dispensers shall be protected in accordance with Section 2307.5, Item 2.

    2307.7 Public fueling of motor vehicles. Self-service LP-gas dispensing systems, including key, code and card lock dispensing systems, shall be limited to the filling of permanently mounted containers providing fuel to the LP-gas powered vehicle.

    The requirements for self-service LP-gas dispensing systems shall be in accordance with the following:

    1. The arrangement and operation of the transfer of product into a vehicle shall be in accordance with this section and Chapter 61.

    2. The system shall be provided with an emergency shutoff switch located within 100 feet (30 480 mm) of, but not less than 20 feet (6096 mm) from, dispensers.

    3. The owner of the LP-gas motor fuel-dispensing facility or the owner’s designee shall provide for the safe operation of the system and the training of users.

    4. The dispenser and hose-end valve shall release not more than [1] / 8 fluid ounce (4 cc) of liquid to the atmosphere upon breaking the connection with the fill valve on the vehicle.

    5. Portable fire extinguishers shall be provided in accordance with Section 2305.5.

    6. Warning signs shall be provided in accordance with Section 2305.6.

    7. The area around the dispenser shall be maintained in accordance with Section 2305.7.

    2307.8 Overfilling. LP-gas containers shall not be filled with LP-gas in excess of the volume determined using the fixed maximum liquid level gauge installed on the container, the volume determined by the overfilling prevention device installed on the container or the weight determined by the required percentage of the water capacity marked on the container.

    SECTION 2308—COMPRESSED NATURAL GAS MOTOR FUEL-DISPENSING FACILITIES

  • CRSC § 1009.12 High relevance — show source text

    Emergency exit and panic hardware.
    |SFM|Part 9, Section 1009.12| |Chapter 12-11A,
    12-11B|Detectable warning products and directional
    surfaces|DSA|Part 2, Sections 1112A.9, 1116A.5, 11B-247,
    11B-406.5.12, 11B-705, 11B-810.5.2| |Chapter 12-12|Reserved||| |Chapter 12-13|Standards for insulating material|CA/SFM|Part 2.5, Section R302.10.1
    Part 6, Section 110.8
    Part 9, Section 720, Table 721.1(1)
    Part 11, Section A5.504.4.8| |Chapter 12-16-1|California standard for earthquake-actuated
    automatic gas shutoff systems|DSA|Part 2, Chapters 16 and 16A
    Part 5, Section 1211.8| |Chapter 12-16-2|California standard for residential excess flow
    actuated automatic gas shutoff valves|DSA|Part 5, Section 1209.1| |Chapter 12-31C|Radiation shielding|DPH|Part 2, Section 3102C| |Chapter 12-71|Air filters|SFM|Part 4, Sections 401.2, 509.2.3, 509.2.3.4
    Part 6, Section 120.1| |Chapter 12-72-1|Protective signaling systems.
    Standard test procedures.|SFM|| |Chapter 12-72-2|Protective signaling systems. Single-and
    multiple-station fire alarm devices
    mechanically operated type.|SFM|| |Chapter 12-72-3|Protective signaling systems. Smoke detectors,
    combustion products type.|SFM||

    2025 CALIFORNIA REFERENCED STANDARDS CODE ix

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    x 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-1 ADMINISTRATION

    RESERVED

    2025 CALIFORNIA REFERENCED STANDARDS CODE 1

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    2 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-3 RELEASING SYSTEMS FOR SECURITY BARS IN DWELLINGS

    (This standard includes provisions of Underwriters Laboratories Subject 2326, Appendix B, dated December 17, 1999, reprinted with their permission.)

    INTRODUCTION

    SECTION 12-3-1—SCOPE

    12-3-1.1 These requirements cover releasing systems for bars, grilles, mesh, glazing or other items intended to provide security at doors and windows required for emergency escape from dwelling units. When actuated by the occupant, the system allows the obstructions over the door or window to be moved so occupants can escape in the event of an emergency.

  • CRSC § 5.9.2 Medium relevance — show source text

    (1) Check valves.

    (2) Three-way valves (of the type that completely closes one side before starting to open the other side).

    (3) Reverse flow indicators controlling positive shutoff valves.

    (4) Normally closed air-actuated positive shutoff pressure regulators. [NFPA 54:5.9.2] 1308.11 Low-Pressure Protection. A protective device shall be installed between the meter and the appliance or equipment if the operation of the appliance or equipment is such that it could produce a vacuum or a dangerous reduction in gas pressure at the meter. Such protective devices include, but are not limited to, mechanical, diaphragm-operated, or electrically operated low-pressure shutoff valves. [NFPA 54:5.10]

    1308.12 Shutoff Valves. Shutoff valves shall be selected in

    accordance with Table 1308.12. Shutoff valves of size 1 inch

    (25 mm) National Pipe Thread and smaller shall be listed and labeled. Where used outdoors, such use shall be in accordance with the manufacturer’s recommendation. [NFPA 54:5.11]

    «

    «

    282 2025 CALIFORNIA MECHANICAL CODE

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

    FUEL GAS PIPING

    Exceptions: (1) A regulator and vent limiting means combination listed as complying with CSA/ANSI Z21.80/CSA 6.22, shall not be required to be vented to the outdoors.

    (2) A listed gas appliance regulator factory equipped with a vent limiting device is not required to be vented to the outdoors.

    (2) Materials for vent piping shall be in accordance with Section 1308.4 through Section 1308.4.10.5. (3) The vent terminus shall be designed to prevent the entry of water, insects, and other foreign matter that could cause blockage. (4) Vent piping shall be installed to minimize static loads and bending moments placed on the regulators and gas pressure control devices.

    (5) Vents shall terminate not less than 3 feet (914 mm) from a possible source of ignition. (6) At locations where a vent termination could be submerged during floods or snow accumulations, an antiflood-type breather vent fitting shall be installed, or the vent terminal shall be located above the height of the expected floodwaters or snow.

    (7) Vent piping from pressure regulators and gas pressure controls shall not be connected to a common manifold that serves a bleed line from a diaphragm-type gas valve.

    [NFPA 54:5.14]

    1309.0 Excess Flow Valve.

    1309.1 General. Where automatic excess flow valves are installed, they shall be listed in accordance with ANSI Z21.93/CSA 6.30 and shall be sized and installed in accordance with the manufacturers’ instructions. [NFPA 54:5.12]

    1310.0 Gas Piping Installation. 1310.1 Piping Underground. Underground gas piping shall be installed with sufficient clearance from any other underground structure to avoid contact therewith, to allow maintenance, and to protect against damage from proximity to other structures. Underground plastic piping shall be installed with sufficient clearance or shall be insulated from any source of heat so as to prevent the heat from impairing the serviceability of the pipe.

  • CRSC § 1308.8 Medium relevance — show source text

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

    TABLE OF CONTENTS

    1308.8 Pressure Limitation

    Requirements . . . . . . . . . . . . . . . . 281

    1308.9 Overpressure Protection Devices. . . . . . . . . . . . . . . . . . . . . 281

    1308.10 Backpressure Protection . . . . . . . 282

    1308.11 Low-Pressure Protection . . . . . . . 282

    1308.12 Shutoff Valves . . . . . . . . . . . . . . . 282

    Table 1308.12 Manual Gas Valve Standards. . . . 282

    1308.13 Expansion and Flexibility . . . . . . . 282

    1308.14 Pressure Regulator and Pressure Control Venting . . . . . . . 282

    1309.0 Excess Flow Valve . . . . . . . . . . . . 283

    1309.1 General. . . . . . . . . . . . . . . . . . . . . 283

    1310.0 Gas Piping Installation . . . . . . . . . 283

    1310.1 Piping Underground . . . . . . . . . . . 283

    1310.2 CSST Piping Systems . . . . . . . . . 284

    1310.3 Installation of Aboveground Piping . . . . . . . . . . . . . . . . . . . . . . 284

    Table 1310.3.5.1 Support of Piping . . . . . . . . . . . . . 285

    1310.4 Concealed Piping in Buildings . . . 285

    1310.5 Piping in Vertical Chases . . . . . . . 286

    1310.6 Maximum Operating Pressure in Buildings . . . . . . . . . . . . . . . . . . 286

    1310.7 Appliance Overpressure Protection . . . . . . . . . . . . . . . . . . . 286

    1310.8 Gas Pipe Turns. . . . . . . . . . . . . . . 286

    1310.9 Drips and Sediment Traps . . . . . . 287

    1310.10 Outlets . . . . . . . . . . . . . . . . . . . . . 287

    1310.11 Manual Gas Shutoff Valves . . . . . 287

    1310.12 Prohibited Devices . . . . . . . . . . . . 288

    1310.13 Systems Containing Gas-Air Mixtures Outside the Flammable

    Range . . . . . . . . . . . . . . . . . . . . . . 288

    1310.14 Systems Containing Flammable Gas-Air Mixtures. . . . . . . . . . . . . . 288

    1311.0 Electrical Bonding and Grounding. . . . . . . . . . . . . . . . . . . 289

    1311.1 Pipe and Tubing other than CSST . . . . . . . . . . . . . . . . . . . . . . 289

    1311.2 Bonding of CSST Gas Piping . . . . 289

    1311.3 Arc-Resistant Jacketed CSST . . . 289

  • CRSC § 1406.2.1.5 Medium relevance — show source text

    1406.2.1.5 Emergency Shutoff Valves. Readily accessible manual or automatic remotely activated fail-safe emergency shutoff valves shall be installed on piping and tubing other than waste lines at the following locations:

    (1) At branch connections into the fabrication area.

    (2) At entries into exit corridors. Excess flow valves shall be installed as required by the fire code.

    1406.2.1.6 Electrical Wiring. Electrical wiring and equipment located in the piping space shall be approved for Class I, Division 2, Hazardous Locations.

    Exception: Occasional transverse crossing of the corridors by supply piping that is enclosed within the corridor need not comply with Section 1406.2.1.1 through Section 1406.2.1.6.

    1406.3 Special Requirements for HPP Gases. In addition to other requirements of this section, HPP gases shall comply with this subsection and the fire code.

    1406.3.1 Special Provisions. Where HPP supply gas is carried in pressurized piping, a fail-safe system shall shut off flow due to a rupture in the piping. Where the piping originates from outside the building, the valve shall be located outside the building as close to the bulk source as practical.

    1406.3.2 Piping and Tubing Installation. Piping and tubing shall be installed in accordance with approved standards. Supply piping for hazardous production materials having a health hazard ranking of 3 or 4 shall have welded connections throughout, unless an exhausted enclosure is provided.

    Exception: Material that is incompatible with ferrous piping shall be permitted to be installed in nonmetallic piping with approved connections.

    1406.3.3 Gas-Detection System. Where hazardous production material gas is used or dispensed and the physiological warning properties of the gas are at a higher level than the accepted permissible exposure limit (PEL) of the gas, a continuous gas-monitoring system shall be provided to detect the presence of the short-term hazard condition. Where dispensing occurs and flammable gases or vapors are capable of being present in quantities in excess of 25 percent of the lower explosive limit (LEL), a continuous gas-monitoring system shall be connected to the emergency control station. The maximum permitted time-weighted average exposures to be utilized shall be as published in 29 CFR 1910.1000.

    336 2025 CALIFORNIA MECHANICAL CODE

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

    CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

    CHAPTER 15 – SOLAR ENERGY SYSTEMS

    (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
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended sections
    listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section
    1502.

  • CRSC § 93.3 Medium relevance — show source text

    Printed copies of this document might be out of date. The Technical Information Library (TIL) has the current version.

    Page 12 of 19 “PG&E” refers to Pacific Gas and Electric Company, a subsidiary of PG&E Corporation.

    ©2021 Pacific Gas and Electric Company. All rights reserved.

    PG&E Internal Information

    Excess Flow Valves A-93.3

    Publication Date: 10/20/2021 Effective Date: 01/01/2022 Rev. 9c

    Target Audience

    Gas distribution engineering and estimating personnel, maintenance and construction personnel, general construction personnel, contractors, applicant designers, and inspectors.

    Definitions

    Branch service line A gas service line that is not directly connected to a gas main but has another service line as its source of supply.

    Farm tap regulator set A pressure regulator set, including both single and multiple stages of pressure regulation, that controls pressure to a service line.

    Nominal operating pressure (NOP)

    The operating pressure of a system that is generally the set point of the working regulator.

    Total connected load Total demand of all gas appliances operating simultaneously and at full capacity.

    Compliance Requirement / Regulatory Commitment

    Code of Federal Regulations (CFR) Title 49, Transportation, Part 192—Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards, Section 192.381, “Service lines: Excess flow valve performance standards.”

    Code of Federal Regulations (CFR) Title 49, Transportation, Part 192—Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards, Section 192.383, “Excess flow valve installation.”

    Records and Information Management:

    Information or records generated by this procedure must be managed in accordance with the Enterprise Records and Information (ERIM) Policy, Standards and Enterprise Records Retention Schedule (ERRS). Refer to GOV-7101S, “Enterprise Records and Information Management Standard,” and related standards. Management of records includes, but is not limited to:

    • Integrity

    • Storage

    • Retention and Disposition

    • Classification and Protection

    Printed copies of this document might be out of date. The Technical Information Library (TIL) has the current version.

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

    ©2021 Pacific Gas and Electric Company. All rights reserved.

    Page 13 of 19

    Excess Flow Valves A-93.3

    Publication Date: 10/20/2021 Effective Date: 01/01/2022 Rev. 9c

    References

    American Society for Testing and Materials (ASTM International) A53, “Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless”

    American Society for Testing and Materials (ASTM International) F1802, “Standard Test Method for Performance Testing of Excess Flow Valves”

    American Society for Testing and Materials (ASTM International) F2138, “Standard Specification for Excess Flow Valves for Natural Gas Service”

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

    Gas Design Standard A-38, “Purging Gas Facilities”

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

    Gas Design Standard A-43.2, “Curb Valves”

    Gas Design Standard D-34, “Qualifications for Joining Polyethylene Pipe”

    Gas Design Standard H-10, “High-Pressure Regulator-Type Stations and Farm Tap Regulator Sets”

  • CRSC § 1-2016 Medium relevance — show source text
    Col1 STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES Col3
    DOCUMENT NUMBER DOCUMENT TITLE APPLICATION
    AHAM AHAM AHAM
    AHAM FWD-1-2016 Food Waste Disposers Appliances
    ARCSA ARCSA ARCSA
    ARCSA/ASPE 78-2015 Stormwater Harvesting System Design for Direct End-Use Applications Miscellaneous
    ASABE ASABE ASABE
    ASABE/ICC 802-2014 Landscape Irrigation Sprinkler and Emitter Standard Irrigation
    ASCE ASCE ASCE
    ASCE 25-2016 Earthquake-Actuated Automatic Gas Shutoff Devices Fuel Gas
    ASHRAE ASHRAE ASHRAE
    ASHRAE/IES 90.1-2019 Energy Standard for Buildings Except Low-Rise Residential Buildings Miscellaneous
    ASHRAE/IES 90.2-2018 Energy-Efficient Design of Low-Rise Residential Buildings Miscellaneous
    ASHRAE 188-2021 Legionellosis: Risk Management for Building Water Systems Risk Management
    ASHRAE Guideline 12-
    2020    		 Managing the Risk of Legionellosis Associated with Building Water Systems Risk Management
    ASME ASME ASME
    ASME A13.1-2020 Scheme for the Identification of Piping Systems Piping
    ASME A112.4.3-1999
    (R2019)    		 Plastic Fittings for Connecting Water Closets to the Sanitary Drainage System Fittings
    ASME A112.19.10-2017 Retrofit Dual Flush Devices for Water Closets Fixtures
    ASME A112.21.3M-1985
    (R2017)    		 Hydrants for Utility and Maintenance Use Valves
    ASME B1.20.3-1976
    (R2018)    		 Dryseal Pipe Threads (Inch) Joints
    ASME B16.39-2019 Malleable Iron Threaded Pipe Unions: Classes 150, 250 and 300 Fittings
    ASME B16.40-2019 Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Sys-
    tems    		 Valves
    ASME B31.1-2020 Power Piping Piping
    ASME B36.19M-2018 Stainless Steel Pipe Piping, Ferrous
    ASME BPVC Section IV-
    2021    		 Rules for Construction of Heating Boilers Miscellaneous
    ASPE ASPE ASPE
    ARCSA/ASPE 78-2015 Stormwater Harvesting System Design for Direct End-Use Applications Miscellaneous
    WQA/ASPE/ANSI S-803-
    2017    		 Sustainable Drinking Water Treatment Systems Miscellaneous
    ASSE ASSE ASSE
    ASSE 1017-2009 Temperature Actuated Mixing Valves for Hot Water Distribution Systems Valves
    ASSE 1066-1997 Individual Pressure Balancing In-Line Valves for Individual Fixture Fittings Valves
    ASSE
  • CRSC § 64703-64705. Medium relevance — show source text

    This installed weight per square foot shall conform with the manufacturer’s installed design density per square foot at the manufacturer’s labeled R -value.

    (b) Water heater insulation kits. No water heater insulation kit shall be sold, on or after March 25, 1982, unless it has a thermal resistance of at least R-6 and is so identified.

    Each water heater insulation kit sold shall include instructions which are equivalent to the Department of Energy standard practice for the installation of insulation on gas-fired, oil-fired and electric resistance water heaters, 44 Fed. Reg. pages 64703-64705.

    Authority: Section 25922, Public Resources Code.

    Reference: Section 25922, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).
    2. Editorial correction of subsection (a) filed 1-13-82 (Register 82, No. 2).

    INTERPRETATION

    Sec. 12-13-1565.

    The General Counsel of the Commission shall make a determination as to the application or interpretation of any provision of this article to any person requesting such a determination. Any such request shall be submitted in writing to the Commission. The Commission shall make written replies to such inquiries and shall widely publish interpretations that have broad application or interest.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Sections 25920 and 25922, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    100 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-16-1 ENGINEERING REGULATIONS—QUALITY AND

    DESIGN OF THE MATERIALS OF CONSTRUCTION

    CALIFORNIA STANDARD FOR EARTHQUAKE-ACTUATED AUTOMATIC GAS SHUTOFF SYSTEMS (SEE CCR TITLE 24, PART 2, CHAPTERS 16 AND 16A, AND CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-1

    DIVISION OF THE STATE ARCHITECT

    Authority: Sections 19180–19183, Health and Safety Code. Reference: Section 19182, Health and Safety Code.

    DIVISION 1—CONSTRUCTION

    SCOPE

    Sec. 12-16-101. The American Society of Civil Engineers (ASCE) requirements for “Earthquake-Actuated Automatic Gas Shutoff Devices,” ANSI/ASCE/SEI 25-16 (copyright 2016 by ASCE), shall be the applicable standard used by the Division of the State Architect for the certification of these devices.

    Sec. 12-16-101.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).

    2025 CALIFORNIA REFERENCED STANDARDS CODE 101

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    102 2025 CALIFORNIA REFERENCED STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    12-16-2 ENGINEERING REGULATIONS—QUALITY AND

  • CRSC § 1208.6 Medium relevance — show source text

    1208.6 Gas Meters . . . . . . . . . . . . . . . . . .220

    1208.7 Gas Pressure Regulators . . . . . . .221

    1208.8 Overpressure Protection Required . . . . . . . . . . . . . . . . . . . .221

    1208.9 Overpressure Protection Devices . . . . . . . . . . . . . . . . . . . . .221

    1208.10 Pressure Limitation

    Requirements . . . . . . . . . . . . . . . .222

    1208.11 Backpressure Protection . . . . . . .222

    1208.12 Low-Pressure Protection . . . . . . .222

    1208.13 Shutoff Valves . . . . . . . . . . . . . . .222

    1208.14 Expansion and Flexibility . . . . . . .222

    1208.15 Pressure Regulator and Pressure Control Venting . . . . . . .222

    Table 1208.13 Manual Gas Valve Standards . . . .223

    1209.0 Excess Flow Valve . . . . . . . . . . . .223

    1209.1 General . . . . . . . . . . . . . . . . . . . . .223

    1210.0 Gas Piping Installation . . . . . . . . .223

    1210.1 Piping Underground . . . . . . . . . . .223

    1210.2 CSST Piping Systems . . . . . . . . .225

    1210.3 Installation of Aboveground Piping . . . . . . . . . . . . . . . . . . . . . .225

    Table 1210.3.5.1 Support of Piping . . . . . . . . . . . . .225

    1210.4 Concealed Piping in Buildings . . .225

    1210.5 Piping in Vertical Chases . . . . . . .226

    1210.6 Gas Pipe Turns . . . . . . . . . . . . . .226

    1210.7 Drips and Sediment Traps . . . . . .227

    1210.8 Outlets . . . . . . . . . . . . . . . . . . . . .227

    1210.9 Manual Gas Shutoff Valves . . . . .227

    1210.10 Prohibited Devices . . . . . . . . . . . .227

    1210.11 Systems Containing Gas-Air Mixtures Outside the

    Flammable Range . . . . . . . . . . . .227

    1210.12 Systems Containing Flammable Gas-Air Mixtures . . . . . . . . . . . . . .227

    1211.0 Electrical Bonding and Grounding . . . . . . . . . . . . . . . . . . .229

    1211.1 Pipe and Tubing Other than CSST . . . . . . . . . . . . . . . . . . . . . .229

    1211.2 Bonding of CSST Gas Piping . . . .229

    1211.3 Arc-Resistant Jacketed CSST . . .229

    1211.4 Prohibited Use . . . . . . . . . . . . . . .229

    1211.5 Lightning Protection System . . . . .229

    1211.6 Electrical Circuits . . . . . . . . . . . . .229

Frequently asked questions

When does the CRSC require an excess‑flow valve to be used?

The CRSC (Standard 12‑16‑2) does not itself mandate when a valve must be installed on a project; it specifies which standards the Division of the State Architect uses to certify residential excess‑flow valves (§ 12‑16‑201) and that installations of customer‑owned certified devices follow the California Plumbing Code (§ 12‑16‑201.1). Local ordinances, the Plumbing Code, or the gas utility may establish when one is required.

Which standards must a residential excess‑flow valve meet under the CRSC?

The valve must meet ASTM F2138‑12(2017) or ANSI Z21.93‑2017 / CSA 6.30‑2017 (the ANSI/CSA standard is cited for valves with pressures up to 5 psig) as specified in § 12‑16‑201.

Who certifies the valve for compliance with those standards?

The Division of the State Architect (DSA) uses the listed standards for certification of these devices, per § 12‑16‑201.

Does the CRSC give valve sizing or installation details?

No. The CRSC declares the applicable certification standards and defers installation requirements to the California Plumbing Code (CCR Title 24, Part 5) — see § 12‑16‑201.1. For sizing and installation details consult ASTM F2138, ANSI Z21.93/CSA 6.30, the California Plumbing Code, and the valve manufacturer’s instructions.

Is an ANSI Z21.93 valve acceptable for typical residential service pressures?

Yes — the ANSI Z21.93/CSA 6.30 standard cited in § 12‑16‑201 is the standard for excess‑flow valves for natural and LP gas with pressure up to 5 psig. Ensure the valve’s individual rated working pressure covers the system pressure.

More in California Referenced Standards Code

Ask about the CRSC

Get cited, plain-English answers on the California Referenced Standards Code for your project — any code section, any scenario.

Start Free Trial

Related in the CRSC

Releasing systems for security bars and emergency‑escape requirements

California standard for earthquake‑actuated automatic gas shutoff systems

Protective signaling systems and detector test procedures (12‑72 series)

Safety‑critical referenced standards and technical chapters in Part 12

California Referenced Standards Code