About Backflow-Prevention Valves
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High-Cycling Check Valves
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With internal components that resist wear from frequent operation, these valves can cycle as often as once per second. Barbed fittings and unthreaded fittings grip onto tubing, providing a secure hold. All valves open to allow flow in one direction and close when flow stops or reverses.
Nylon valves are more impact resistant than polypropylene valves.
Polypropylene valves are more corrosion resistant than nylon valves.
Polycarbonate valves are clear so you can monitor your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
Pipe Size | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
__ | 1/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 1/4" | 000000000 | 00000 |
__ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 11/16" | 00000000 | 0000 |
__ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 11/16" | 00000000 | 0000 |
__ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 00000000 | 0000 |
__ | 5/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 00000000 | 0000 |
__ | 3/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 9/16" | 000000000 | 0000 |
__ | 3/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 7/8" | 000000000 | 000 |
Unthreaded Male Inlet × Unthreaded Male Outlet | ||||||||||
__ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 00000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||||
1/8 | 1/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 3/8" | 0000000 | 0000 |
1/8 | 3/16" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 9/16" | 0000000 | 0000 |
1/8 | 3/8" | 50 psi @ 65° F | 0.5 | -60° to 200° | Silicone Rubber | Silicone Rubber | Off-White | 1 5/8" | 0000000 | 0000 |
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
Pipe Size | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
__ | 1/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/4" | 000000000 | 00000 |
__ | 3/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | White | 1 11/16" | 00000000 | 0000 |
__ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 9/16" | 00000000 | 0000 |
__ | 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 000000000 | 0000 |
__ | 5/16" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Black | 1 3/4" | 00000000 | 0000 |
__ | 3/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 9/16" | 000000000 | 0000 |
__ | 3/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 7/8" | 000000000 | 0000 |
Unthreaded Male Inlet × Unthreaded Male Outlet | ||||||||||
__ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | White | 1 5/8" | 00000000 | 0000 |
__ | 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 000000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||||
1/8 | 1/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 3/8" | 000000000 | 0000 |
1/8 | 3/16" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/2" | 000000000 | 0000 |
1/8 | 1/4" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 1/2" | 000000000 | 0000 |
1/8 | 3/8" | 50 psi @ 65° F | 0.5 | 32° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | Off-White | 1 5/8" | 000000000 | 0000 |
- For Use With: Air, Water
- Diaphragm Material: Silicone Rubber
- Seal Material: Silicone Rubber
Pipe Size | For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Barbed Male Inlet × Barbed Male Outlet | ||||||||
---|---|---|---|---|---|---|---|---|
__ | 1/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000000 | 00000 |
__ | 3/16" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 11/16" | 000000000 | 0000 |
__ | 1/4" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 5/8" | 000000000 | 000 |
__ | 3/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 15/16" | 000000000 | 0000 |
NPT Male Inlet × Barbed Male Outlet | ||||||||
1/8 | 1/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 3/8" | 000000000 | 0000 |
1/8 | 3/16" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000000 | 0000 |
1/8 | 1/4" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000000 | 0000 |
1/8 | 3/8" | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 5/8" | 000000000 | 0000 |
Check Valves with Quick-Turn Fittings
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- For Use With: Air, Water
- Diaphragm Material: Silicone Rubber
- Seal Material: Silicone Rubber
Also known as luer lock couplings, quick-turn fittings consist of a plug and a socket that connect with a half turn, so you can easily connect and disconnect your line. These valves open to allow flow in one direction and close when flow stops or reverses. The clear body allows you to visually inspect flow and debris accumulation.
For technical drawings and 3-D models, click on a part number.
Gender | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Polycarbonate Plastic Body | |||||||
---|---|---|---|---|---|---|---|
Quick-Turn | |||||||
Female Inlet × Female Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1" | 000000 | 00000 |
Female Inlet × Male Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000 | 0000 |
Male Inlet × Male Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/2" | 000000 | 0000 |
Male Inlet × Female Outlet | 50 psi @ 65° F | 0.5 | -80° to 275° | Clear | 1 1/4" | 000000 | 0000 |
Check Valves with Barbed Fittings for Harsh Chemicals
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Prevent backflow in chemical tubing lines. These valves have barbed fittings that grip onto tubing, providing a secure hold. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
PVDF valve resists abrasion and UV light.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Butane, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Hydrochloric Acid, Nitric Acid, Oil, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, Water
- Diaphragm Material: Fluoroelastomer Rubber
- Seal Material: Fluoroelastomer Rubber
For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Barbed × Barbed | |||||||
---|---|---|---|---|---|---|---|
1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | White | 1 21/32" | 00000000 | 00000 |
Vacuum-Breaking Valves for Chemicals
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A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum breakers, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
- For Use With: Air, Ammonia, Argon, Beverage, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Food, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water, Xenon
- Diaphragm Material: Fluoroelastomer Rubber
- Seal Material: Fluoroelastomer Rubber
Pipe Size | For Pipe Schedule | Max. Pressure | Min. Opening Pressure, psi | End-to-End Lg. | Color | Temperature Range, °F | Each | |
PVC Plastic Body | ||||||||
---|---|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||||
1/2 | 80 | 100 psi @ 75° F | 1 | 4 5/16" | Gray | 40° to 140° | 000000 | 0000000 |
3/4 | 80 | 100 psi @ 75° F | 1 | 4 5/8" | Gray | 40° to 140° | 0000000 | 000000 |
1 | 80 | 100 psi @ 75° F | 1 | 5 1/8" | Gray | 40° to 140° | 0000000 | 000000 |
CPVC Plastic Body | ||||||||
NPT Female × NPT Female | ||||||||
1/2 | 80 | 100 psi @ 75° F | 1 | 4 5/16" | Light Gray | 40° to 180° | 0000000 | 000000 |
3/4 | 80 | 100 psi @ 75° F | 1 | 4 5/8" | Light Gray | 40° to 180° | 0000000 | 000000 |
1 | 80 | 100 psi @ 75° F | 1 | 5 1/8" | Light Gray | 40° to 180° | 0000000 | 000000 |