Earthquake‑actuated automatic gas shutoff systems (12‑16‑1)

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

• CRSC § 7.14.1 High relevance — show source text

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

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

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

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

  [NFPA 54:9.6.1]

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

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

  FUEL GAS PIPING

• CRSC § 1211.2 High relevance — show source text

  Where any CSST component of a piping system does not have an arcresistant jacket or coating system, the bonding requirements of Section 1211.2 shall apply. Arc-resistant jacketed CSST shall be considered to be bonded when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supplying that appliance. [NFPA 54:7.12.3] 1211.4 Prohibited Use. Gas piping shall not be used as a grounding conductor or electrode. [NFPA 54:7.12.4.1] 1211.5 Lightning Protection System. Where a lightning protection system is installed, the bonding of the gas piping shall be in accordance with NFPA 780. [NFPA 54:7.12.5]

  1211.6 Electrical Circuits. Electrical circuits shall not utilize gas piping or components as conductors. Exception: Low-voltage (50 V or less) control circuits, ignition circuits, and electronic flame detection device circuits shall be permitted to make use of piping or components as a part of an electric circuit. [NFPA 54:7.13] 1211.7 Electrical Connections. All electrical connections between wiring and electrically operated control devices in a

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

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

• 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).

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  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).

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  12-31C RADIATION SHIELDING STANDARDS

  STANDARD 12-31C-1

  DEPARTMENT OF HEALTH SERVICES

• 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 § 64703-64705. High 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).

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  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).

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  12-16-2 ENGINEERING REGULATIONS—QUALITY AND

• CRSC § 1009.12 Medium 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||

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  12-1 ADMINISTRATION

  RESERVED

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  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 § 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 § 12-16 Medium 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).

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  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.

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  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 § 509.4.1 Medium relevance — show source text

  2021)|Fuel Gas, Appliances|509.4.1, 509.4.2,
  509.4.3| |UL 1777-2015|Chimney Liners (with revisions through April 11, 2019)|Chimney Liners|509.5.3(2)| |UL 2523-2009|Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters,
  and Boilers (with revisions through March 16, 2018)|Fuel Gas, Appliances|Table 501.1(1)| |UL 2561-2016|1400 Degree Fahrenheit Factory-Built Chimneys (with revisions
  through April 19, 2018)|Fuel Gas, Appli-
  ances|509.5.1| |WSC|WSC|WSC|WSC| |ASSE 1099-2021/WSC PST
  2000-2021|Pressurized Water Storage Tanks|Valves|607.2|

  2025 CALIFORNIA PLUMBING CODE 351

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

  REFERENCED STANDARDS

  1701.2 Standards, Publications, Practices, and Guides. The standards, publications, practices, and guides listed in Table 1701.2 are not referenced in other sections of

  this code. The application of the referenced standards, publi

  cations, practices, and guides shall be as specified in Section 301.2.2. The promulgating agency acronyms are found at the end of the tables.

  TABLE 1701.2

  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.

• CRSC § 6004.2.2.10.2 Medium relevance — show source text

  Exception: Signal transmission to a constantly attended control station is not required where not more than one cylinder of highly toxic or toxic gas is stored.

  6004.2.2.10.2 Shut off of gas supply. The gas-detection system shall automatically close the shutoff valve at the source on gas supply piping and tubing related to the system being monitored for whichever gas is detected.

  Exception: Automatic shutdown is not required for reactors utilized for the production of highly toxic or toxic compressed gases where such reactors are:

  1. Operated at pressures less than 15 pounds per square inch gauge (psig) (103.4 kPa).
  2. Constantly attended.
  3. Provided with emergency shutoff valves that have ready access.

  6004.2.2.10.3 Valve closure. Automatic closure of shutoff valves shall be in accordance with the following:

  1. Where the gas-detection sampling point initiating the gas detection system alarm is within a gas cabinet or exhausted enclosure, the shutoff valve in the gas cabinet or exhausted enclosure for the specific gas detected shall automatically close.
  2. Where the gas-detection sampling point initiating the gas detection system alarm is within a gas room and compressed gas containers are not in gas cabinets or exhausted enclosures, the shutoff valves on all gas lines for the specific gas detected shall automatically close.
  3. Where the gas-detection sampling point initiating the gas detection system alarm is within a piping distribution manifold enclosure, the shutoff valve for the compressed container of specific gas detected supplying the manifold shall automatically close.

  Exception: Where the gas-detection sampling point initiating the gas-detection system alarm is at a use location or within a gas valve enclosure of a branch line downstream of a piping distribution manifold, the shutoff valve in the gas valve enclosure for the branch line located in the piping distribution manifold enclosure shall automatically close.

  6004.3 Outdoor storage and use. The outdoor storage and use of highly toxic and toxic compressed gases shall be in accordance with Sections 6004.3.1 through 6004.3.4.

  6004.3.1 Applicability. The applicability of regulations governing the outdoor storage and use of highly toxic and toxic compressed gases shall be as set forth in Sections 6004.3.1.1 through 6004.3.1.3.

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  HIGHLY TOXIC AND TOXIC MATERIALS

  6004.3.1.1 Quantities not exceeding the maximum allowable quantity per control area. The outdoor storage or use of highly toxic and toxic gases in amounts not exceeding the maximum allowable quantity per control area set forth in Table 5003.1.1(4) shall be in accordance with Sections 5001, 5003 and 6001.

  6004.3.1.2 Quantities exceeding the maximum allowable quantity per control area. The outdoor storage or use of highly toxic and toxic gases in amounts exceeding the maximum allowable quantity per control area set forth in Table 5003.1.1(4) shall be in accordance with Sections 6001 and 6004.3 and Chapter 50.

  6004.3.1.3 Ozone-gas generators. The outdoor use of ozone-gas-generating equipment shall be in accordance with Section 6005.

• CRSC § 5.9.1.1 Medium relevance — show source text

  Gas and air combustion mixers incorporating double diaphragm “zero” or “atmosphere” governors or regulators shall require no further protection unless connected directly to compressed air or oxygen at pressures of 5 psi (34 kPa) or more. [NFPA 54:5.9.1.1 – 5.9.1.2]

  1208.11.1 Protective Devices. Protective devices

  shall include but not be limited to the following:

  (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]

  1208.12 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]

  1208.13 Shutoff Valves. Shutoff valves shall be selected in

  accordance with Table 1208.13. 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]

  1208.14 Expansion and Flexibility. Piping systems shall be designed to prevent failure from thermal expansion or contraction. [NFPA 54:5.13.1]

  1208.14.1 Special Local Conditions. Where local conditions include earthquake, tornado, unstable ground, or flood hazards, special consideration shall be given to increased strength and flexibility of piping supports and connections. [NFPA 54:5.13.2]

  1208.15 Pressure Regulator and Pressure Control Venting. The venting of the atmospheric side of diaphragms in line pressure regulators, gas appliance regulators, and gas pressure limit controls shall be in accordance with all of the following:

  (1) An independent vent pipe to the outdoors, sized in accordance with the device manufacturer’s instructions, shall be provided where the location of a device is such that a discharge of fuel gas will cause a hazard. For devices other than appliance regulators, vents are not required to be independent where the vents are connected to a common manifold designed in accordance with engineering methods to minimize backpressure in the event of diaphragm failure and such design is approved.

  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.

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  222 2025 CALIFORNIA PLUMBING CODE

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

  FUEL GAS PIPING

  (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 1208.5 through Section 1208.5.12.5.

• CRSC § 0.500 Medium relevance — show source text

  375**|0.500|0.625|0.750|0.875|1.125|1.375|1.625|2.125| |INSIDE:3|INSIDE:3|0.305|0.402|0.527|0.652|0.745|0.995|1.245|1.481|1.959| |LENGTH (feet)|LENGTH (feet)|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR|CAPACITY IN CUBIC FEET OF GAS PER HOUR| |10
  20
  30
  40
  50|10
  20
  30
  40
  50|27
  18
  15
  13
  11|55
  38
  30
  26
  23|111
  77
  61
  53
  47|195
  134
  107
  92
  82|276
  190
  152
  131
  116|590
  406
  326
  279
  247|1060
  730
  586
  502
  445|1680
  1150
  925
  791
  701|3490
  2400
  1930
  1650
  1460| |60
  70
  80
  90
  100|60
  70
  80
  90
  100|10
  NA
  NA
  NA
  NA|21
  19
  18
  17
  16|42
  39
  36
  34
  32|74
  68
  63
  59
  56|105
  96
  90
  84<b