About Backflow-Prevention Valves
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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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About On/Off Valves
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On/Off Valves with Quick-Turn Fittings
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.
Polycarbonate valves are lightweight and more economical than nickel-plated brass valves, but they are not as durable. These valves have a T-handle that resists accidental movement when snagged or bumped.
Nickel-plated brass valves are more corrosion resistant and durable than polycarbonate valves, however they are heavier and more expensive.
For technical drawings and 3-D models, click on a part number.
- Valve Type: Stop Cock
- For Use With: Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon
| For Tube ID | Max. Pressure | End-to-End Lg. | Each | |
Quick-Turn Female × Barbed | ||||
|---|---|---|---|---|
| 1/8" | 50 psi @ 70° F | 1 3/8" | 0000000 | 00000 |
Quick-Turn Female × Quick-Turn Female | ||||
| __ | 50 psi @ 70° F | 1 3/16" | 0000000 | 0000 |
Quick-Turn Male × Barbed | ||||
| 1/8" | 50 psi @ 70° F | 1 1/2" | 0000000 | 0000 |
Quick-Turn Male × Quick-Turn Female | ||||
| __ | 50 psi @ 70° F | 1 3/8" | 0000000 | 0000 |
Quick-Turn Male × Quick-Turn Male | ||||
| __ | 50 psi @ 70° F | 1 1/2" | 0000000 | 0000 |
- Valve Type: Stop Cock
- For Use With: Oil, Water
Check Valves with Quick-Turn Fittings
- 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 |
Plastic Quick-Turn Tube Couplings with Shut-Off for Air and Water
- Temperature Range: -50° to 150° F
- Tubing: Use with firm or soft (Durometer 35A-85A) PVC plastic or silicone rubber, except fittings with pipe end
A built-in shut-off valve stops the flow when the coupling is separated, so air or water won’t leak from your line. Also known as luer lock couplings, these consist of a plug and socket (sold separately) that connect with a half turn. They have a compact body, so they’re easy to fit in tight spaces. Couplings have a universal connection, so the plugs will connect to any of the sockets, regardless of the pipe or tube size. They are nylon, which is lightweight with good impact and abrasion resistance.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
Gas Sampling Valves for Syringes
- Valve Type: Plug
- For Use With: Butane, Carbon Dioxide, Natural Gas, Nitrogen, Oxygen
Convert an everyday syringe into a gas sampling syringe. These valves allow you to collect, transport, and store gas samples without worrying about evaporation or leaks. Slide the female end over the base of your syringe and attach a needle to the male side.
For technical drawings and 3-D models, click on a part number.
| Flow Pattern | Maximum Pressure | Temperature Range | End-to-End Lg. | Autoclavable | Each | |
Plastic Body with Standard Lever Handle | ||||||
|---|---|---|---|---|---|---|
Female Luer Lock × Male Luer Lock | ||||||
| Straight | 100 psi @ 70° F | Not Rated | 1" | Yes | 0000000 | 0000000 |