CPC · California Plumbing Code
What are the requirements for shutoff valves, manifolds, and check valves?
The California Plumbing Code requires accessible shutoffs in each dwelling, control valves at appliances and manifolds (with special rules when manifolds are not readily accessible), and check valves where pumps circulate water; valve materials and types are specified by size and application (see §§ 606.0, 606.3, 606.5, 606.9).
Last reviewed: July 6, 2026
What the code requires — 2-4 sentences
The California Plumbing Code requires that shutoff valves, control valves (including manifolds), and check valves be the appropriate type and material, be installed at specified locations to allow isolation and servicing, and be accessible. Key controlling sections are § 606.0, § 606.3, § 606.5, and § 606.9.
Always install accessible shutoff/control valves so each unit or fixture can be isolated, install control valves immediately ahead of appliances or manifolds, and install check valve(s) where pumps circulate water.
Requirements in detail
1) General materials and valve types (what the valve must be)
- Valves ≤ 2 inches (50 mm) in size shall be copper alloy or other approved material; valves > 2 inches (50 mm) may have cast iron, copper alloy, or other approved bodies. Valves for potable water must meet the listed standards in the Code. § 606.1.
- If a copper alloy contains more than 15 percent zinc by weight and is used on plastic piping, it must be resistant to dezincification and stress corrosion cracking. § 606.1.
- Valves used to control two or more openings must be fullway gate valves, ball valves, or other approved valves designed for that service. § 606.4.
2) Fullway (main) shutoff locations
- A fullway valve shall be installed on the discharge side of each water meter and each unmetered water supply; on the discharge piping from water supply tanks at or near the tank; and on the cold water supply pipe to each water heater at or near the heater. § 606.2.
- These fullway valves must be accessible. § 606.2.
3) Multidwelling (per-unit) shutoffs
- In multidwelling units, provide one or more shutoff valves in each dwelling unit so the water to a fixture or group of fixtures in that unit can be shut off without stopping supply to other units. These valves must be accessible in the dwelling unit they control. § 606.3.
4) Control valves, manifolds, and how they must be installed/identified
- A control valve shall be installed immediately ahead of each water‑supplied appliance and immediately ahead of each slip joint or appliance supply. § 606.5.
- For parallel water distribution systems (manifold systems):
- Provide a control valve either immediately ahead of each fixture or at the manifold, and identify the valve with the fixture it supplies. § 606.5.
- If the manifold is located in an attic, crawl space, or other location not readily accessible, a separate shutoff valve is required immediately ahead of each fixture or appliance served. § 606.5.
- Field‑installed manifolds must conform with the Code requirements for valves, piping, and fittings; manufactured water distribution manifolds must conform to IAPMO IGC 109. § 606.5.1.
- Required shutoff or control valves shall be accessible. § 606.6.
5) Check valves for pumped (circulated) systems
- All systems that circulate water by means of a pump or other mechanical device shall have a check valve(s) or equal device(s) installed so as to ensure the direction of flow. § 606.9.
Quick decision table (decision‑relevant dimensions / values)
| Decision point | Required or threshold | Code reference |
|---|---|---|
| Valve material, size ≤ 2 inches (50 mm) | Copper alloy or approved material | § 606.1 |
| Valve body permitted > 2 inches (50 mm) | Cast iron, copper alloy, or approved materials allowed | § 606.1 |
| Copper alloy with > 15% zinc used on plastic piping | Must be resistant to dezincification & stress corrosion cracking | § 606.1 |
| Valve controlling multiple openings | Fullway gate, ball, or other approved valve | § 606.4 |
| Main/fullway valve locations | On meter discharge, unmetered supply, tank discharge, and cold side of each water heater | § 606.2 |
| Multidwelling units | Shutoff(s) in each unit, accessible, to isolate fixtures without affecting other units | § 606.3 |
| Parallel (manifold) systems | Control valve at each fixture or at manifold, identified; if manifold not readily accessible, individual shutoffs required | § 606.5 |
| Manifold manufacture standard | Manufactured manifolds: IAPMO IGC 109 | § 606.5.1 |
| Pumped/circulated water systems | Check valve(s) required to ensure direction of flow | § 606.9 |
Exceptions & special cases
- If a parallel distribution manifold is located in an attic, crawl space, or other location not readily accessible, the Code requires separate shutoff valves immediately ahead of each fixture or appliance served (i.e., you cannot rely on the inaccessible manifold alone). § 606.5.
- Manufactured manifolds must meet IAPMO IGC 109; field‑installed manifolds must conform to the Code’s pipe/valve/fitting requirements. § 606.5.1.
If a particular installation detail or product marking is not included in the retrieved CPC snippets (for example, a specific labeling format or additional sizing rules referenced only by external standards), that detail is not covered here and the Code text or referenced standards should be consulted directly.
Common mistakes
- Installing shutoffs that are not accessible (violates the accessibility requirement). § 606.6.
- Using the wrong valve type to control multiple openings (e.g., using a small globe valve where a fullway gate or ball valve is required). § 606.4.
- Placing the only shutoff at a manifold in a space that is not readily accessible without providing individual fixture shutoffs as required. § 606.5.
- Forgetting check valve(s) on systems that circulate water by pump, which can allow reverse flow when the pump stops. § 606.9.
- Using copper alloys with > 15% zinc on plastic piping without checking for dezincification resistance. § 606.1.
Worked example — concrete scenario
Scenario: A 4‑unit apartment building has a single water service and a pumped hot‑water recirculation loop. The building owner will install a parallel plumbing manifold in an attic to supply bathrooms.
What to do (per the CPC):
- Install a fullway valve on the discharge side of the water meter (main shutoff) and make it accessible. § 606.2.
- Provide one or more shutoff valves inside each dwelling unit so the water to that unit’s fixtures can be shut off without stopping water to other units (e.g., a 1" shutoff at each unit entry). § 606.3.
- Because the manifold will be in the attic (not readily accessible), install separate shutoff valves immediately ahead of each individual fixture or appliance in addition to the manifold control valves. § 606.5.
- For the recirculation pump, install a check valve on the pump discharge (or at another suitable location in the loop) so flow cannot reverse when the pump stops. § 606.9.
- Select valve materials consistent with § 606.1 (e.g., copper alloy up to 2 inches (50 mm), or approved alternatives for larger sizes) and ensure potable‑water valves meet the listed standards. § 606.1.
This approach meets the Code’s isolation, accessibility, and pumped‑system flow‑direction requirements.
Related provisions
- § 606.1 — Valve materials, standards, dezincification requirement.
- § 606.2 — Fullway valve locations and accessibility.
- § 606.4 — Valves used to control multiple openings.
- § 606.5.1 — Field‑installed and manufactured manifold requirements (IAPMO IGC 109).
- § 606.6 — Accessibility requirement for required shutoff/control valves.
- § 606.7 — Control valve for multiple fixtures supplied by an automatic metering valve.
- § 606.8 — OSHPD note about sectionalizing valves in certain hospital occupancies.
- § 606.9 — Check valve(s) required on pumped (circulated) systems.
Code references
Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:
CPC § 606.0 High relevance — show source text
606.0 Valves.
606.1 General. Valves up to and including 2 inches (50 mm) in size shall be copper alloy or other approved material. Sizes exceeding 2 inches (50 mm) shall be permitted to have bodies of cast iron, copper alloy, or other approved materials. Each gate or ball valve shall be a fullway or full-port type with working parts of the non-corrosive material. Where valves are made from copper alloys containing more than 15 percent zinc by weight and are used in plastic piping systems, they shall be resistant to dezincification and stress corrosion cracking in compliance with NSF/ANSI 14. Valves carrying water used in potable water systems shall comply with the requirements of ASME A112.4.14/CSA B125.14, ASME
B16.34, ASTM F1970, ASTM F2389, AWWA C500, AWWA C504, AWWA C507, IAPMO/ANSI Z1157, MSS SP-67, MSS SP-70, MSS SP-71, MSS SP-72, MSS SP-78, MSS SP-80, MSS SP-110, MSS SP-122, or NSF/ANSI 359. Valves intended to supply drinking water shall also comply with the requirements of NSF/ANSI/CAN 61. 606.2 Fullway Valve. A fullway valve controlling outlets shall be installed on the discharge side of each water meter and each unmetered water supply. Water piping supplying more than one building on one premise shall be equipped with a separate fullway valve to each building, so arranged that the water supply can be turned on or off to an individual or separate building provided; however, that supply piping to a single-family residence and building accessory thereto shall be permitted to be controlled by one valve. Such shutoff valves shall be accessible. A fullway valve shall be installed on the discharge piping from water supply tanks at or near the tank. A fullway valve shall be installed on the cold water supply pipe to each water heater at or near the water heater. 606.3 Multidwelling Units. In multidwelling units, one or more shutoff valves shall be provided in each dwelling unit so that the water supply to a plumbing fixture or group of fixtures in that dwelling unit can be shut off without stopping water supply to fixtures in other dwelling units. These valves shall be accessible in the dwelling unit that they control. 606.4 Multiple Openings. Valves used to control two or more openings shall be fullway gate valves, ball valves, or other approved valves designed and approved for the service intended.
606.5 Control Valve. A control valve shall be installed immediately ahead of each water-supplied appliance and immediately ahead of each slip joint or appliance supply. Parallel water distribution systems shall provide a control valve either immediately ahead of each fixture being supplied or installed at the manifold, and shall be identified with the fixture being supplied. Where parallel water distribution system manifolds are located in attics, crawl spaces, or other locations not readily accessible, a separate shutoff valve shall be required immediately ahead of each individual fixture or appliance served. 606.5.1 Manifolds. Field installed manifolds for water distribution shall conform with the applicable requirements for valves, pipes, and fittings as referenced in this code. Manufactured water distribution manifolds shall
be in accordance with IAPMO IGC 109.
606.6 Accessible. Required shutoff or control valves shall be accessible.
CPC § 606.6 High relevance — show source text
Manufactured water distribution manifolds shall
be in accordance with IAPMO IGC 109.
606.6 Accessible. Required shutoff or control valves shall be accessible.
606.7 Multiple Fixtures. A single control valve shall be installed on a water supply line ahead of an automatic metering valve that supplies a battery of fixtures. 606.8 [OSHPD 1, 1R, 2, 3, 4 & 5] Each riser or branch shall be provided with an accessible sectionalizing valve in hot-and cold-water systems to permit servicing or replace- ment of piping or equipment. Stop valves shall be provided at each fixture. 606.9 Check Valve Required. All systems that circulate water by means of a pump or other mechanical device or method shall have a check valve(s) or equal device(s) installed so as to ensure the direction of flow.
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WATER SUPPLY AND DISTRIBUTION
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606.10 Leak Detection Devices. Where leak detection devices for water supply and distribution are installed, they shall comply with ANSI/CAN/IAPMO Z1349.
607.0 Potable Water Supply Tanks. 607.1 General. Potable water supply tanks shall be installed in accordance with the manufacturer’s installation instructions and supported in accordance with the California Building Code . 607.2 Private Well Water Tanks. Pressurized potable water tanks for private well water systems shall comply with ASSE 1099/WSC-PST 2000.
607.3 Potable Water Tanks. Potable water supply tanks, interior tank coatings, or tank liners intended to supply drinking water shall comply with NSF/ANSI/CAN 61. 607.4 Venting. Tanks used for potable water shall be tightly covered and vented in accordance with the manufacturer’s
installation instructions. Such vent shall be screened with a cor rosion-resistant material of not less than number 24 mesh.
607.5 Overflow. Tanks shall have not less than a 16 square inch (0.01 m [2] ) overflow that is screened with a corrosionresistant material of not less than number 24 mesh.
607.6 Valves. Pressurized tanks shall be provided with a listed pressure-relief valve installed in accordance with the manufacturer’s installation instructions. The relief valve shall be discharged in accordance with Section 608.5. Where a potable water supply tank is located above the fixtures, appliances, or system components it serves, it shall be equipped with a vacuum relief valve that complies with ANSI Z21.22/CSA 4.4.
608.0 Water Pressure, Pressure Regulators, Pres- sure Relief Valves, and Vacuum Relief Valves. 608.1 Inadequate Water Pressure. Where the water pressure in the main or other source of supply will not provide a residual water pressure of not less than 15 pounds force per square inch (psi) (103 kPa), after allowing for friction and other pressure losses, a tank and a pump or other means that will provide said 15 psi (103 kPa) pressure shall be installed. Where fixtures, fixture fittings, or both are installed that, require a residual pressure exceeding 15 psi (103 kPa), that minimum residual pressure shall be provided.
**608.2 Excessive Water Pressure.
CPC § 606.3 High relevance — show source text
Such shutoff valves shall be accessible. A fullway valve shall be installed on the discharge piping from water supply tanks at or near the tank. A fullway valve shall be installed on the cold water supply pipe to each water heater at or near the water heater. 606.3 Multidwelling Units. In multidwelling units, one or more shutoff valves shall be provided in each dwelling unit so that the water supply to a plumbing fixture or group of fixtures in that dwelling unit can be shut off without stopping water supply to fixtures in other dwelling units. These valves shall be accessible in the dwelling unit that they control. 606.4 Multiple Openings. Valves used to control two or more openings shall be fullway gate valves, ball valves, or other approved valves designed and approved for the service intended.
606.5 Control Valve. A control valve shall be installed immediately ahead of each water-supplied appliance and immediately ahead of each slip joint or appliance supply. Parallel water distribution systems shall provide a control valve either immediately ahead of each fixture being supplied or installed at the manifold, and shall be identified with the fixture being supplied. Where parallel water distribution system manifolds are located in attics, crawl spaces, or other locations not readily accessible, a separate shutoff valve shall be required immediately ahead of each individual fixture or appliance served. 606.5.1 Manifolds. Field installed manifolds for water distribution shall conform with the applicable requirements for valves, pipes, and fittings as referenced in this code. Manufactured water distribution manifolds shall
be in accordance with IAPMO IGC 109.
606.6 Accessible. Required shutoff or control valves shall be accessible.
606.7 Multiple Fixtures. A single control valve shall be installed on a water supply line ahead of an automatic metering valve that supplies a battery of fixtures. 606.8 [OSHPD 1, 1R, 2, 3, 4 & 5] Each riser or branch shall be provided with an accessible sectionalizing valve in hot-and cold-water systems to permit servicing or replace- ment of piping or equipment. Stop valves shall be provided at each fixture. 606.9 Check Valve Required. All systems that circulate water by means of a pump or other mechanical device or method shall have a check valve(s) or equal device(s) installed so as to ensure the direction of flow.
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WATER SUPPLY AND DISTRIBUTION
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606.10 Leak Detection Devices. Where leak detection devices for water supply and distribution are installed, they shall comply with ANSI/CAN/IAPMO Z1349.
607.0 Potable Water Supply Tanks. 607.1 General. Potable water supply tanks shall be installed in accordance with the manufacturer’s installation instructions and supported in accordance with the California Building Code . 607.2 Private Well Water Tanks. Pressurized potable water tanks for private well water systems shall comply with ASSE 1099/WSC-PST 2000.
CPC § 5.9.1.1 High 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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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.
CPC § 3663.3 Medium relevance — show source text
(n) A high oil temperature interlock for oil or liquid fuel requiring preheating.
(o) The burner oil pump shall automatically not operate or rotate while the alternate fuel is firing.
(p) A pressure-relief valve shall be provided between safety shutoff valves and between pump and safety valves where an integral valve is used with a pump.
(q) A separate relief device is required on each transfer
pump.
(3) One million to 2 499 999 Btu/h (293 kW to 732 kW) input per burner.
(a) One approved manual shutoff valve lever handle.
(b) One approved fuel-oil filter, installed on the supply piping.
(c) Two safety shutoff valves in series with a combined flame failure response and valve closing time not to exceed 5 seconds with strainer directly before the valves.
(d) Programmed electronic flame safeguard including proven low-fire start, manual reset lockout, 100 percent shutoff (both pilot and main burner), and a separately supervised and proven pilot.
Flame-sensing systems utilizing a UV scanner shall prove pilot and interrupt ignition spark prior to main burner valves being energized.
(e) Two controls, one operating and one high limit, activated by temperature or pressure.
(f) Burners relying on mechanical means to provide air for combustion shall have actual proof-of-air interlock device.
(g) Power burners shall include proven prepurge of not less than 60 seconds at high-fire damper settings. This prepurge shall occur before every burner cycle, regardless of reason.
(h) Installations with dampered combustion air openings shall prove damper open position before trial for burner ignition.
(i) Vent dampers and flue dampers shall be interlocked to prevent burner ignition unless safely open.
(j) One high oil or liquid fuel-pressure interlock, reset from flame safeguard or manually.
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APPENDIX C
(k) Where hot water or steam, two low water cutoffs.
(l) An atomizing medium proving switch.
(m) A low oil temperature switch for oil or liquid fuel requiring preheating.
(n) A high oil temperature interlock for oil or liquid fuel requiring preheating.
(o) The burner oil pump shall automatically not operate or rotate while the alternate fuel is firing.
(p) A pressure-relief valve shall be provided between safety shutoff valves and between pump and safety valves where an integral valve is used with a pump.
(q) A separate relief device is required on each transfer
pump.
(r) One low oil or liquid fuel-pressure interlock, reset from flame safeguard or manually.
(s) Burners with automatic controls, prepurge, proofof-closure, modulation, or postpurge shall not use relays external to the flame safeguard to accomplish these functions.
(4) Two million five hundred thousand to 12 499 999 Btu/h (733 kW to 3663.3 kW) per burner.
(a) One approved manual shutoff valve lever handle.
(b) One approved fuel-oil filter, installed on the supply piping.
(c) Two safety shutoff valves in series, with a combined flame failure response and valve closing time not to exceed 5 seconds with strainer directly before the valves.
CPC § 1208.10.1 Medium relevance — show source text
1208.10.1 Overpressure Protection Required. Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14 inches water column (3.5 kPa) are required to be equipped with overpressure protection by Section 1208.8, each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance as required by the appliance manufacturer’s installation instructions. [NFPA 54:5.8.2.2]
1208.10.2 Overpressure Protection Devices. Each overpressure protection device installed to meet the requirements of this section shall be capable of limiting the pressure to its connected appliance(s) as required by this section independently of any other pressure control equipment in the piping system. [NFPA 54:5.8.2.3] 1208.10.3 Detection of Failure. Each gas piping system for which an overpressure protection device is required by this section shall be designed and installed so that a failure of the primary pressure control device(s) is detectable. [NFPA 54:5.8.2.4] 1208.10.4 Flow Capacity. If a pressure relief valve is used to meet the requirements of this section, it shall have a flow capacity such that the pressure in the protected system is maintained at or below the limits specified in Section 1208.10 under the following conditions:
(1) The line pressure regulator for which the relief valve is providing overpressure protection has failed wide
open.
(2) The gas pressure at the inlet of the line pressure regulator for which the relief valve is providing overpressure protection is not less than the regulator’s normal operating inlet pressure. [NFPA 54:5.8.2.5]
1208.11 Backpressure Protection. Protective devices shall be installed as close to the equipment as practical where the design of equipment connected is such that air, oxygen, or standby gases could be forced into the gas supply system.
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]
CPC § 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]
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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.
CPC § 603.3 Medium relevance — show source text
Testing or maintenance shall be performed by a certified backflow assembly tester or repairer certified in accordance with ASSE/IAPMO/ANSI Series 5000 or any other additional certification approved by the Authority Having Jurisdiction.
603.3 Backflow Prevention Devices, Assemblies, and Methods. Backflow prevention devices, assemblies, and methods shall comply with Section 603.3.1 through Section 603.3.12.
603.3.1 Air Gap. The minimum air gap to afford backflow protection shall be in accordance with Table 603.3.1. 603.3.2 Atmospheric Vacuum Breaker (AVB). An atmospheric vacuum breaker consists of a body, a checking member, and an atmospheric port.
603.3.3 Hose Connection Backflow Preventer. A hose connection backflow preventer consists of two independent check valves with an independent atmospheric vent between and a means of field testing and draining.
603.3.4 Double Check Valve Backflow Prevention Assembly (DC). A double check valve backflow prevention assembly consists of two independently acting internally loaded check valves, four properly located test cocks, and two isolation valves.
603.3.5 Pressure Vacuum Breaker Backflow Pre- vention Assembly (PVB). A pressure vacuum breaker backflow prevention assembly consists of a loaded air inlet valve, an internally loaded check valve, two properly located test cocks, and two isolation valves. This device shall be permitted to be installed indoors where provisions for spillage are provided. 603.3.6 Spill-Resistant Pressure Vacuum Breaker (SVB). A pressure-type vacuum breaker backflow prevention assembly consists of one check valve force loaded closed and an air inlet vent valve force loaded open to atmosphere, positioned downstream of the check valve and located between and including two tightly closing shutoff valves and test cocks. 603.3.7 Reduced-Pressure Principle Backflow Prevention Assembly (RP). A reduced-pressure principle backflow prevention assembly consists of two independently acting internally loaded check valves, a differential pressure relief valve, four properly located test cocks, and two isolation valves.
603.3.8 Double Check Detector Fire Protection Backflow Prevention Assembly. A double check valve backflow prevention assembly with a parallel
detector assembly consisting of a water meter and a double check valve backflow prevention assembly (DC).
603.3.9 Reduced Pressure Detector Fire Protec- tion Backflow Prevention Assembly. A reducedpressure principle backflow prevention assembly with a parallel detector assembly consisting of a water meter and a reduced-pressure principle backflow prevention assembly (RP).
603.3.10 Dual Check Backflow Preventer. A dual check backflow preventer consists of two independently acting check valves, force loaded to a normally closed position.
603.3.11 Laboratory Faucet Backflow Preven- ters. Laboratory faucet backflow preventers shall comply with ASSE 1035.
603.3.12 Backflow Preventer with Intermediate Atmospheric Vent. A backflow preventer with intermediate atmospheric vent consists of two independently acting check valves, force loaded to a normally closed position, and an intermediate chamber with a means for automatically venting to atmosphere, force loaded to a normally open position. 603.4 General Requirements. Assemblies shall comply with listed standards and be acceptable to the Authority Having Jurisdiction, with jurisdiction over the selection and installation of backflow prevention assemblies.
**603.4.1 Backflow Prevention Valve.
CPC § 5003.1.2 Medium relevance — show source text
Exempted materials and conditions listed in this table are required to comply with provisions of this code that are not based on exceeding maximum allowable quantities in
Section 5003.|5003.1.2 Conversion. Where quantities are indicated in pounds and where the weight per gallon of the liquid is not provided to the fire code official, a conversion factor of 10 pounds per gallon (1.2 kg/L) shall be used.
5003.1.3 Quantities not exceeding the maximum allowable quantity per control area. The storage, use and handling of hazardous materials in quantities not exceeding the maximum allowable quantity per control area indicated in Tables 5003.1.1(1) through 5003.1.1(4) shall be in accordance with Sections 5001 and 5003.
5003.1.4 Quantities exceeding the maximum allowable quantity per control area. The storage and use of hazardous materials in quantities exceeding the maximum allowable quantity per control area indicated in Tables 5003.1.1(1) through 5003.1.1(4) shall be in accordance with this chapter.
5003.2 Systems, equipment and processes. Systems, equipment and processes utilized for storage, dispensing, use or handling of hazardous materials shall be in accordance with Sections 5003.2.1 through 5003.2.9.
5003.2.1 Design and construction of containers, cylinders and tanks. Containers, cylinders and tanks shall be designed and constructed in accordance with approved standards. Containers, cylinders, tanks and other means used for containment of hazardous materials shall be of an approved type. Pressure vessels not meeting DOTn requirements for transportation shall comply with the ASME Boiler and Pressure Vessel Code.
5003.2.2 Piping, tubing, valves and fittings. Piping, tubing, valves, and fittings conveying hazardous materials shall be designed and installed in accordance with ASME B31.1 or other approved standards, and shall be in accordance with Sections 5003.2.2.1 and 5003.2.2.2.
5003.2.2.1 Design and construction. Piping, tubing, valves, fittings and related components used for hazardous materials shall be in accordance with the following:
- Piping, tubing, valves, fittings and related components shall be designed and fabricated from materials that are compatible with the material to be contained and shall be of adequate strength and durability to withstand the pressure, structural and seismic stress and exposure to which they are subject.
- Piping and tubing shall be identified in accordance with ASME A13.1 to indicate the material conveyed.
- Manual valves or automatic remotely activated fail-safe emergency shutoff valves shall be installed on supply piping and tubing and provided with ready access at the following locations: 3.1. The point of use. 3.2. The tank, cylinder or bulk source.
- Manual emergency shutoff valves and controls for remotely activated emergency shutoff valves shall be clearly visible, provided with ready access and identified in an approved manner.
- Backflow prevention or check valves shall be provided where the backflow of hazardous materials could create a hazardous condition or cause the unauthorized discharge of hazardous materials.
Exceptions:
- Piping for inlet connections designed to prevent backflow.
- Piping for pressure relief devices.
CPC § 1324.0 Medium relevance — show source text
1324.0 Performance Criteria and Testing Category 1 (Gases, Medical Surgical Vacuum). 1324.1 Where Required. Inspection and testing shall be performed on components, or portions thereof, of new, piped medical gas or vacuum systems, additions, renovations, temporary installations, or repaired systems in accordance with Section 1324.2 through Section 1324.5.11, and certified in accordance with Section 1306.0.
1324.2 Breached Systems. All systems that are breached and components that are subject to additions, renovations, or replacement (e.g., new gas sources: bulk, manifolds, compressors, dryers, alarms) shall be inspected and tested. Systems shall be deemed breached at the point of pipeline intrusion by physical separation or by system component removal, replacement, or addition. Breached portions of the systems subject to inspection and testing shall be confined to only the specific altered zone and components in the immediate zone or area that is located upstream for vacuum systems and downstream for pressure gases at the point or area of intrusion. [NFPA 99:5.1.12.1.3 – 5.1.12.1.5]
1324.2.1 Reports. The inspection and testing reports shall be submitted directly to the party that contracted for the testing, who shall submit the report through channels to the responsible facility authority and any others that are required. Reports shall contain detailed listings of all findings and results. [NFPA 99:5.1.12.1.6, 5.1.12.1.7] 1324.3 Test Gas. The test gas shall be oil-free, dry nitrogen NF. [NFPA 99:5.1.12.2.1.2]
1324.4 Initial Piping Blowdown. Piping in medical gas and vacuum distribution systems shall be blown clear by means of oil-free, dry nitrogen NF after installation of the distribution piping but before installation of station outlet/inlet rough-in assemblies and other system components (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, pressure relief valves, manifolds, source equipment). [NFPA 99:5.1.12.2.2]
1324.5 Initial Pressure Tests – Medical Gas and Vac- uum Systems. Each section of the piping in medical gas and vacuum systems shall be pressure tested. Initial pressure tests shall be conducted as follows:
(1) After blowdown of the distribution piping.
(2) After installation of station outlet/inlet rough-in assemblies.
(3) Prior to the installation of components of the distribution piping system that would be damaged by the test pressure (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, line pressure relief valves). [NFPA 99:5.1.12.2.3.1, 5.1.12.2.3.2]
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HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1324.5.1 Shutoff Valve. The source shutoff valve shall
remain closed during tests specified in Section 1324.5 through Section 1324.5.1.2. [NFPA 99:5.1.12.2.3.3]
CPC § 1311.4 Medium relevance — show source text
1311.4 Location . . . . . . . . . . . . . . . . . . . .281
1311.5 Separate Compressors . . . . . . . . .281
1311.6 Screening . . . . . . . . . . . . . . . . . . .281
1312.0 Medical Surgical Vacuum Central Supply Systems . . . . . . . .281
1312.1 General . . . . . . . . . . . . . . . . . . . . .281
1312.2 Medical-Surgical Vacuum Sources . . . . . . . . . . . . . . . . . . . .281
1312.3 Vacuum Receivers . . . . . . . . . . . .281
1312.4 Vacuum Filtration . . . . . . . . . . . . .281
1312.5 Piping Arrangement and Redundancies . . . . . . . . . . . . . . . .282
1312.6 Piping Serviceability . . . . . . . . . . .282
1312.7 Shutoff Valve . . . . . . . . . . . . . . . .282
1313.0 Medical-Surgical Vacuum Exhaust . . . . . . . . . . . . . . . . . . . . .282
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TABLE OF CONTENTS
1313.1 Vacuum Source Exhausts . . . . . .282
1313.2 Location . . . . . . . . . . . . . . . . . . . .282
1313.3 Screening . . . . . . . . . . . . . . . . . . .282
1313.4 Dips and Loops . . . . . . . . . . . . . .282
1313.5 Multiple Pumps . . . . . . . . . . . . . . .282
1314.0 Valves . . . . . . . . . . . . . . . . . . . . . .282
1314.1 Gas and Vacuum Shutoff
Valves . . . . . . . . . . . . . . . . . . . . . .282
1314.2 Security . . . . . . . . . . . . . . . . . . . . .282
1314.3 Labeled . . . . . . . . . . . . . . . . . . . . .282
1314.4 Accessibility . . . . . . . . . . . . . . . . .282
1314.5 Valve Types . . . . . . . . . . . . . . . . .282
Table 1314.5(1) Positive Pressure Gases . . . . . . .283
Table 1314.5(2) Vacuum and WAGD . . . . . . . . . . .283
1314.6 Source Valves . . . . . . . . . . . . . . .283
1314.7 Main Line Valve . . . . . . . . . . . . . .283
1314.8 Riser Valves . . . . . . . . . . . . . . . . .283
1314.9 Service Valves . . . . . . . . . . . . . . .283
CPC § 1324.4 Medium relevance — show source text
1324.4 Initial Piping Blowdown. Piping in medical gas and vacuum distribution systems shall be blown clear by means of oil-free, dry nitrogen NF after installation of the distribution piping but before installation of station outlet/inlet rough-in assemblies and other system components (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, pressure relief valves, manifolds, source equipment). [NFPA 99:5.1.12.2.2]
1324.5 Initial Pressure Tests – Medical Gas and Vac- uum Systems. Each section of the piping in medical gas and vacuum systems shall be pressure tested. Initial pressure tests shall be conducted as follows:
(1) After blowdown of the distribution piping.
(2) After installation of station outlet/inlet rough-in assemblies.
(3) Prior to the installation of components of the distribution piping system that would be damaged by the test pressure (e.g., pressure/vacuum alarm devices, pressure/vacuum indicators, line pressure relief valves). [NFPA 99:5.1.12.2.3.1, 5.1.12.2.3.2]
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HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1324.5.1 Shutoff Valve. The source shutoff valve shall
remain closed during tests specified in Section 1324.5 through Section 1324.5.1.2. [NFPA 99:5.1.12.2.3.3]
1324.5.1.1 Required Test Pressure. The test pressure for pressure gases and vacuum systems shall be 1.5 times the system operating pressure but not less than a gauge pressure of 150 psi (1034 kPa). The test pressure shall be maintained until each joint has been examined for leakage by means of a leak detectant that is safe for use with oxygen and does not contain ammonia. [NFPA 99:5.1.12.2.3.4, 5.1.12.2.3.5]
1324.5.1.2 Leaks. Leaks, if any, shall be located, repaired (if permitted), replaced (if required), and retested. [NFPA 99:5.1.12.2.3.6]
1324.5.2 Initial Cross-Connection Test. It shall be
determined that no cross-connections exist between the
various medical gas and vacuum piping systems. [NFPA 99:5.1.12.2.4]
1324.5.2.1 Atmospheric Pressure. All piping systems shall be reduced to atmospheric pressure.
[NFPA 99:5.1.12.2.4.1]
1324.5.2.2 Sources of Test Gas. Sources of test
gas shall be disconnected from all piping systems, except for the one system being tested. [NFPA 99:5.1.12.2.4.2]
1324.5.2.3 System to Be Charged. The system under test shall be charged with oil-free, dry nitrogen NF to a gauge pressure of 50 psi (345 kPa).
[NFPA 99:5.1.12.2.4.3]
Frequently asked questions
Do shutoff valves have to be accessible?
Yes. The Code requires that required shutoff or control valves be accessible. § 606.6.
Where must a check valve be installed for a recirculation pump?
The Code requires check valve(s) or equal devices be installed on any system that circulates water by pump to ensure the direction of flow; the precise location is wherever it will ensure flow direction (commonly on the pump discharge). § 606.9.
If a manifold is in an attic, can I rely on the attic manifold shutoffs alone?
No. If the manifold is not readily accessible (attic, crawl space, etc.), you must provide a separate shutoff immediately ahead of each fixture or appliance served. § 606.5.
What valve types are allowed when one valve controls multiple outlets?
Valves controlling two or more openings must be fullway gate valves, ball valves, or other approved valves designed for that service. § 606.4.
Are there specific standards valves for potable water must meet?
Yes. Valves carrying potable water shall comply with the standards listed in the Code (see § 606.1) and valves intended to supply drinking water must also comply with NSF/ANSI/CAN 61 where required. § 606.1.
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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