About Backflow-Prevention Valves
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Check Valves with Solder-Connect Fittings
- For Use With: Steam, Water
- Disc Material: Bronze
- Seal Material: Bronze
Solder these valves to copper tubing for a permanent, leak-tight connection. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
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.
| For Copper Tube Size  | For Tube OD | Flow Coefficient (Cv) | Pressure Class | Max. Pressure | Max. Steam Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Features | Each | |
Bronze Body | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Solder Connect × Solder Connect | |||||||||||
| 1/4 | 3/8" | 1.3 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 1/16" | Removable Cap | 0000000 | 000000 |
| 3/8 | 1/2" | 2.5 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 1/16" | Removable Cap | 0000000 | 00000 |
| 1/2 | 5/8" | 4.8 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 9/16" | Removable Cap | 0000000 | 00000 |
| 3/4 | 7/8" | 14.3 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 3 3/8" | Removable Cap | 0000000 | 000000 |
| 1 | 1 1/8" | 24 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 4 1/16" | Removable Cap | 0000000 | 000000 |
| 1 1/2 | 1 5/8" | 60 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 5 1/4" | Removable Cap | 0000000 | 000000 |
| 2 | 2 1/8" | 102 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 6 3/8" | Removable Cap | 0000000 | 000000 |
High-Flow Threaded Check Valves
To achieve the maximum possible flow, internal components are designed to reduce flow resistance. These valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.
Repair kits include everything you need to rebuild the valve.
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.
- For Use With: Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon
- Disc Material: See table
- Seal Material: See table
Valves | Repair Kits | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Disc Material | Seal Material | End-to-End Lg. | Features | Each | Each | ||
NPT Female × NPT Female—Pressure Class 150 | |||||||||||||
| 1/4 | 2.3 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
| 3/8 | 4.3 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 00000 | 000000 | 00 |
| 1/2 | 7.2 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Brass | Brass | 2 5/8" | Removable Cap | 0000000 | 00000 | 000000 | 00 |
| 3/4 | 13 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Brass | Brass | 3" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
| 1 | 22 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Brass | Brass | 3 11/16" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
| 1 1/4 | 39 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Brass | Brass | 4 3/8" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
| 1 1/2 | 56 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Brass | Brass | 4 5/8" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
| 2 | 92 | 300 psi @ 150° F | 150 psi @ 366° F | 0.5 | -20° to 405° | Bronze | Bronze | 5 7/8" | Removable Cap | 0000000 | 000000 | 000000 | 00 |
NPT Female × NPT Female—Pressure Class 200 | |||||||||||||
| 1/4 | 2.3 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 3/8 | 4.3 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1/2 | 7.2 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 5/8" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 3/4 | 13 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 3" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1 | 22 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 3 11/16" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1 1/4 | 39 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 4 3/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 1 1/2 | 56 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 4 5/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 2 | 92 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 5 7/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 2 1/2 | 150 | 400 psi @ 150° F | 200 psi @ 388° F | 0.5 | -20° to 550° | Bronze | Bronze | 7" | Removable Cap | 0000000 | 000000 | 00000000 | 00000000 |
NPT Female × NPT Female—Pressure Class 300 | |||||||||||||
| 1/4 | 2.3 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 3/8 | 4.3 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 1/4" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1/2 | 7.2 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 2 5/8" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 3/4 | 13 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 3" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1 | 22 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 3 11/16" | Removable Cap | 0000000 | 000000 | 00000000 | 00000 |
| 1 1/4 | 39 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 4 3/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 1 1/2 | 56 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 4 5/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 2 | 92 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 5 7/8" | Removable Cap | 0000000 | 000000 | 00000000 | 000000 |
| 2 1/2 | 150 | 600 psi @ 150° F | 300 psi @ 422° F | 0.5 | -20° to 550° | Bronze | Bronze | 7" | Removable Cap | 0000000 | 00000000 | 00000000 | 00000000 |
Clear-View Socket-Connect Check Valves
- For Use With: Air, Water
- Piston Material: PVC Plastic
- Seal Material: EPDM Rubber
Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. They have a removable cap that provides easy access to internal components for maintenance.
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.
| Pipe Size | For Pipe Schedule | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Features | Each | |
PVC Plastic Body | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Socket Connect × Socket Connect | ||||||||||
| 1/2 | 40, 80 | 6.7 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 5 5/8" | Removable Cap | 0000000 | 000000 |
| 3/4 | 40, 80 | 11.9 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 6 5/16" | Removable Cap | 0000000 | 00000 |
| 1 | 40, 80 | 21 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 6 7/8" | Removable Cap | 0000000 | 00000 |
| 1 1/2 | 40, 80 | 49 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 8 1/8" | Removable Cap | 0000000 | 000000 |
| 2 | 40, 80 | 77 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 8 7/8" | Removable Cap | 0000000 | 000000 |
| 3 | 40, 80 | 168 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 12 1/4" | Removable Cap | 0000000 | 000000 |
Socket-Connect Check Valves for Harsh Chemicals
Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves have a plastic body and a fluoroelastomer seal for excellent chemical resistance. They 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.
- For Use With: Citric Acid, Deionized Water, Diesel Fuel, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite, Water
- Piston Material: PVC Plastic
- Spring Material: PVC Plastic
- Seal Material: Fluoroelastomer Rubber
| Pipe Size | For Pipe Schedule | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Socket Connect × Socket Connect | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/4 | 40, 80 | 3 | 150 psi @ 70° F | 2 | 40° to 140° | Dark Gray | 4 3/16" | 000000 | 0000000 |
| 1 | 40, 80 | 9 | 150 psi @ 70° F | 2 | 40° to 140° | Dark Gray | 5 3/16" | 000000 | 000000 |
| 1 1/4 | 40, 80 | 26 | 150 psi @ 70° F | 2 | 40° to 140° | Dark Gray | 6 5/8" | 000000 | 000000 |
| 1 1/2 | 40, 80 | 45 | 150 psi @ 70° F | 2 | 40° to 140° | Dark Gray | 6 5/8" | 000000 | 000000 |
| 2 | 40, 80 | 65 | 150 psi @ 70° F | 2 | 40° to 140° | Dark Gray | 7 5/8" | 000000 | 000000 |
- For Use With: Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite, Water
- Piston Material: CPVC Plastic
- Spring Material: CPVC Plastic
- Seal Material: Fluoroelastomer Rubber
| Pipe Size | For Pipe Schedule | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Socket Connect × Socket Connect | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 40, 80 | 0.8 | 150 psi @ 70° F | 2 | 40° to 190° | Light Gray | 3 3/8" | 0000000 | 0000000 |
| 3/4 | 40, 80 | 3 | 150 psi @ 70° F | 2 | 40° to 190° | Light Gray | 4 3/16" | 0000000 | 000000 |
| 1 | 40, 80 | 9 | 150 psi @ 70° F | 2 | 40° to 190° | Light Gray | 5 3/16" | 0000000 | 000000 |
| 1 1/2 | 40, 80 | 45 | 150 psi @ 70° F | 2 | 40° to 190° | Light Gray | 6 5/8" | 0000000 | 000000 |
| 2 | 40, 80 | 65 | 150 psi @ 70° F | 2 | 40° to 190° | Light Gray | 7 5/8" | 0000000 | 000000 |
Clear-View Socket-Connect Check Valves for Harsh Chemicals
- For Use With: Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol, Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water
- Piston Material: PVC Plastic
- Seal Material: Fluoroelastomer Rubber
Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. Valves have a PVC body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
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.
| Pipe Size | For Pipe Schedule | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Features | Each | |
PVC Plastic Body | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Socket Connect × Socket Connect | ||||||||||
| 1/2 | 40, 80 | 6.7 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 5 5/8" | Removable Cap | 0000000 | 000000 |
| 3/4 | 40, 80 | 11.9 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 6 5/16" | Removable Cap | 0000000 | 00000 |
| 1 | 40, 80 | 21 | 150 psi @ 70° F | 0.29 | 35° to 140° | Clear | 6 7/8" | Removable Cap | 0000000 | 000000 |