About Backflow-Prevention Valves
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Check Valves for Refrigerant
- Spring Material: Stainless Steel
- Seal Material: Neoprene Rubber
- Ball Material: Stainless Steel
- For Use With: Refrigerant
Use these valves in refrigeration and air-conditioning systems. All open to allow flow in one direction and close when flow stops or reverses. They solder to copper tubing for a permanent, leak-tight connection.
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 technical drawings and 3-D models, click on a part number.
| For Copper Tube Size  | For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Copper Body | ||||||||
|---|---|---|---|---|---|---|---|---|
Solder Connect × Solder Connect | ||||||||
| 1/4 | 3/8" | 1.2 | 755 psi @ 300° F | 1 | -40° to 300° | 3 3/4" | 0000000 | 000000 |
| 3/8 | 1/2" | 2.2 | 755 psi @ 300° F | 1 | -40° to 300° | 3 3/4" | 0000000 | 00000 |
| 3/4 | 7/8" | 7.5 | 755 psi @ 300° F | 1 | -40° to 300° | 4 1/2" | 0000000 | 00000 |
| 1 | 1 1/8" | 12.4 | 755 psi @ 300° F | 1 | -40° to 300° | 5" | 0000000 | 000000 |
Threaded Temperature-Regulating Valves for Water
- For Use With: Water
- Max. Inlet Temperature: 180° F for Brass, 200° F for Copper
- Max. Inlet Pressure: 150 psi
These valves blend hot and cold water to automatically maintain a set outlet temperature. Adjust the outlet temperature within the range.
Valves with safety shut-off restrict flow down to a drip if your cold water supply shuts off.
Strainers trap debris.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Pipe Size | Location | End-to-End Lg. | Max. Flow Rate, gpm | Outlet Temp. Range, ° F | Each | |
NPT Female | ||||||||
Copper Silicon Alloy Body with Safety Shut‐off, Internal Check Valves, and Strainers | ||||||||
| 1/2 | Side | 1/2 | Bottom | 4 7/8" | 25 | 90° to 160° | 000000 | 0000000 |
| 3/4 | Side | 3/4 | Bottom | 4 7/8" | 25 | 90° to 160° | 000000 | 000000 |
| 1 | Side | 1 | Bottom | 5 5/16" | 25 | 90° to 160° | 000000 | 000000 |
Solder-On Air Conditioner Service Valves
Tap into refrigerant lines to drain and fill your system. These valves are self-piercing and can be installed without drilling a hole into the line. A valve cap is included.
Valve Port Thread | Core | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Lg. | Dia. | Type | Gender | Dia. | Material | Body Material | Each | |
| 1/4" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 00000 |
| 5/16" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 0000 |
| 3/8" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 00000 |
| 1/2" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 00000 |
| 5/8" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 00000 |
| 3/4" | 1 1/2" | 1/4" | UN/UNF (SAE 45°) | Male | 1/4" | Nickel-Plated Brass | Copper | 0000000 | 00000 |
| 1/4" SAE Brass Caps (Pkg. of 10) | 0000000 | Pkg. | 000000 |