Pipe Size Pipe Size |
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Connection Style Connection Style |
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Body Material Body Material |
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Connection Type Connection Type | Show |
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System of Measurement System of Measurement |
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Specifications Met Specifications Met |
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Thread Direction Thread Direction |
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Fitting Type Fitting Type |
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 | Adapter |
Material Material |
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Valve Type Valve Type |
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Maximum Pressure Maximum Pressure |
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Component Component |
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Mounting Orientation Mounting Orientation |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Valve Function Valve Function |
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Flow Coefficient (Cv) Flow Coefficient (Cv) |
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About Backflow-Prevention Valves
More
Vacuum-Breaking Valves with Garden-Hose Fittings
- For Use With: Air, Water
- Seal Material: Rubber
Prevent dirty, contaminated water from backing up into your garden hose line—install these valves between a faucet and a garden hose. Also known as vacuum breakers, these valves have a built-in check valve that blocks backflow, so you can leave your hose in a utility sink full of dirty water without the water going back into the line.
When the check valve is closed, it has vents that open to release the water. This reduces pressure in the line and confirms the valve is working. Because these valves vent water, use them in environments where spilled water won’t cause a problem. This design adheres to ASSE Standard 1011 for valves with a vent.
Mount valves to faucet outlets with a set screw, and easily thread or unthread a hose while the valves stay in place.
Valves comply with Uniform Plumbing Code (UPC) and are CSA certified, so they're safe to use in sanitary plumbing systems because they prevent contamination from flowing backward into your line.
These valves are designed to be used intermittently. They've been tested under ANSI A112.1.3, which assumes the valves will not be used for more than 12 hours at a time.
Chrome-plated brass valves are more corrosion resistant than plain brass valves.
Valves with tamper-resistant set screws have a head that breaks off after tightening to prevent valve removal after installation.
Valves that meet NSF/ANSI Standard 372 are certified lead free.
| Thread Size | Max. Pressure | Temperature Range, °F | End-to-End Lg. | Specifications Met | Each | |
Brass Body | ||||||
|---|---|---|---|---|---|---|
GHT Female × GHT Male | ||||||
With Set Screw | ||||||
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3 | 00000000 | 000000 |
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3, NSF/ANSI 372 | 00000000 | 00000 |
With Tamper-Resistant Set Screw | ||||||
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3 | 00000000 | 00000 |
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3, NSF/ANSI 372 | 00000000 | 00000 |
Chrome-Plated Brass Body | ||||||
GHT Female × GHT Male | ||||||
With Set Screw | ||||||
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3 | 00000000 | 00000 |
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3, NSF/ANSI 372 | 00000000 | 00000 |
With Tamper-Resistant Set Screw | ||||||
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3 | 00000000 | 00000 |
| 3/4" | 125 psi @ 70° F | 30° to 180° | 1 1/2" | ASSE Standard 1011, Uniform Plumbing Code, CSA Certified B64.2, ANSI A112.1.3, NSF/ANSI 372 | 00000000 | 00000 |
Welding Gas Check Valves for Regulators
Stop the reverse flow of gas in your regulator. Check valves do not stop flashbacks.
Welding Gas Check Valves for Torches
Stop the reverse flow of gas in your torch. Check valves do not stop flashbacks.
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oxygen | Acetylene | Hydrogen | Propane | Thread Direction | Thread Size | Thread Type | Thread Direction | Thread Size | Thread Type | Material | Each | |
| 125 | __ | __ | __ | Right Hand | 3/8"-24 | UNF | Right Hand | 3/8"-24 | UNF | Brass | 000000 | 000000 |
| 125 | __ | __ | __ | Right Hand | 9/16"-18 | UNF | Right Hand | 9/16"-18 | UNF | Brass | 000000 | 0000 |
| __ | 50 | 50 | 50 | Left Hand | 3/8"-24 | UNF | Left Hand | 3/8"-24 | UNF | Brass | 000000 | 00000 |
| __ | 50 | 50 | 50 | Left Hand | 9/16"-18 | UNF | Left Hand | 9/16"-18 | UNF | Brass | 000000 | 0000 |
Welding Gas Flashback Arresters for Torches
These arresters attach directly to torches that cut steel up to 8" thick. They extinguish flames and have a check valve to stop reverse gas flow. They are reusable; resetting is not required after flashback.
Arresters with right-hand threads are for use with oxygen; arresters with left-hand threads are for use with acetylene, hydrogen, and propane.
Male Hose Connection | Female Hose Connection | |||||||
|---|---|---|---|---|---|---|---|---|
| Max. Pressure for Oxygen, psi | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
| 143 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
| 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oxygen | Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Pair | |
| 143 | 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Welding Gas Flashback Arresters for Regulators
Attach these arresters to the outlet connection of a regulator on a torch that cuts steel up to 11" thick. Arresters extinguish flames and have a check valve to stop reverse gas flow. They are reusable; resetting is not required after flashback.
Arresters with right-hand threads are for use with oxygen; arresters with left-hand threads are for use with acetylene, hydrogen, and propane.
Male Hose Connection | Female Hose Connection | |||||||
|---|---|---|---|---|---|---|---|---|
| Max. Pressure for Oxygen, psi | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
| 143 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
| 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oxygen | Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Pair | |
| 143 | 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |