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About Backflow-Prevention Valves
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Check Valves with Push-to-Connect Fittings
Insert tubing into the push-to-connect fittings—no heat, solder, or flux required. These valves open to allow flow in one direction and close when flow stops or reverses.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
Nickel-Plated Brass Body—Push-to-Connect Female Inlet × Push-to-Connect Female Outlet Straight
Push-to-Connect Female Inlet x Push-to-Connect Female Outlet Straight
- For Use With:
Inch: Air, Argon, Helium, Krypton, Neon, Nirtrogen, Oil, Water, Xenon
Metric: Air, Helium, Krypton, Neon, Nitrogen, Oil, Water, Xenon - Piston Material: Brass
- Spring Material: 302 Stainless Steel
- Seal Material: See Table
| For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Seal Material | End-to-End Lg. | Each | |
| 1/4" | Not Rated | 115 psi @ 70° F | 3 | 0° to 160° | Viton® Fluoroelastomer | 2 1/16" | 00000000 | 000000 |
| 3/8" | Not Rated | 115 psi @ 70° F | 3 | 0° to 160° | Viton® Fluoroelastomer | 2 1/4" | 00000000 | 00000 |
| 4mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 1 3/4" | 00000000 | 00000 |
| 6mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 2 1/16" | 00000000 | 00000 |
| 8mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 2 1/4" | 00000000 | 00000 |
Check Valves with Barbed Fittings for Vacuum
- For Use With: Air, Water
- Disc Material: Neoprene Rubber
- Seal Material: Polyethylene Plastic
Barbs grip onto tubing, providing a secure hold to prevent vacuum loss in tubing lines. These valves open to allow flow in one direction and close when flow stops or reverses.