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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Natural and LP Gas Hose Fittings
Use these couplings when you need frequent access to a gas line. A complete coupling consists of a plug and a socket (sold separately or in a set) that connect and disconnect quickly. All of the natural and LP gas plugs are compatible with any of the natural and LP gas sockets of the same coupling size, regardless of the pipe size. Plugs and sockets are brass for good corrosion resistance. These couplings are rated ANSI Z21.41/CSA 6.9 for use with gas fuel appliances. CSA-US and CSA Certified, they also meet U.S. and Canadian safety standards.
Plugs are also known as nipples. They have a heat-sensitive fuse that will stop gas flow in the event of a fire.
Sockets have a shut-off valve that stops the flow when the coupling is separated, so gas won’t leak from the line. They are sleeve-lock style. To connect, slide back the sleeve on the socket, insert the plug, and release the sleeve. To disconnect, slide back the sleeve and pull out the plug.
NPTF (Dryseal) threads are compatible with NPT threads.
When couplings are not connected, add dust caps and plugs to keep contaminants out of your gas line.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Stop the flow before you disconnect the line.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Plug Tip | ||||||
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| Coupling Size | Lg. | Dia. | Pipe Size  | Thread Type | Each | |
Brass | ||||||
| 1 1/4 | 19/32" | 1 1/4" | 1 1/4 | NPTF | 00000000 | 000000 |
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Dust Caps and Plugs for Natural and LP Gas Hose Fittings
To keep contaminants out of your gas line, add these dust caps and plugs to natural and LP gas couplings when they’re not connected. All work with couplings that are rated ANSI Z21.41/CSA 6.9 for use with gas fuel appliances.
For technical drawings and 3-D models, click on a part number.
Quick-Disconnect Hose Couplings for Compressed Gas
Use these couplings to quickly link and unlink welding hoses, torches, and pressure regulators. They consist of a plug and socket that are sold together as a set of two—you’ll get one right-hand connection for oxygen and one left-hand connection for fuel gas. The connections are noninterchangeable and color coded so you can’t mix lines. The male threaded ends attach to threaded welding hose, and the female threaded ends attach to a torch or pressure regulator. To connect couplings, push the plug into the socket; the sleeve on the socket has a spring-loaded lock for gas-tight connections. To disconnect, pull back on the socket sleeve and twist to release the plug. The sockets have a shut-off valve that stops the flow when the coupling is separated so gas won’t leak from the line. The sockets also have a built-in check valve to prevent gas backflow. Couplings are also known as CGA (Compressed Gas Association) couplings. They are brass for good corrosion resistance.
Couplings with left-hand threads are identified with a notch in the nut.
Note: Couplings have a CGA number that corresponds to a specific type of gas. Make sure the CGA number of the coupling matches the CGA number of your tank and other system components.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
- Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed
| Includes | Trade Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
| One CGA 022 Coupling Adapter (Male Hose Plug × Female Torch Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Female Torch Socket) | B | 9/16"-18 | UN/UNF (CGA) | Right Hand (CGA 022), Left Hand (CGA 023) | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane | 000000 | 000000 |
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
- Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed
| Includes | Trade Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
| One CGA 022 Coupling Adapter (Male Hose Plug × Female Regulator Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Female Regulator Socket) | B | 9/16"-18 | UN/UNF (CGA) | Right Hand (CGA 022), Left Hand (CGA 023) | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane | 000000 | 000000 |
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
- Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed
| Includes | Trade Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
| One CGA 022 Coupling Adapter (Male Hose Plug × Male Hose Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Male Hose Socket) | B | 9/16"-18 | UN/UNF (CGA) | Right Hand (CGA 022), Left Hand (CGA 023) | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane | 000000 | 000000 |