WATTS LF7 Series Dual Check Valves

What is the maximum working pressure of these valves?

These valves operate under pressures ranging from 10 to 150 psi under temperatures up to 180 degrees F.

What are the benefits of double check valves?

• The other check valve takes over if the first check valve becomes stuck open.
• Closed check valves provide tighter seals and prevent even small leaks by lowering the pressure differential across the other valve.

What are the points to remember while installing these valves?

• They should be installed downstream of the water meter & the water pressure regulator.
• They should always be installed in an accessible location for easy servicing and testing.
• Pipe lines should be thoroughly flushed to remove foreign material before installing the unit.
• Protect from freezing and ensure that the valve is installed in the proper flow direction.
• Refer to flow direction arrow on valve nameplate or body.
• When installing a valve in the pipeline, only use wrenching flats.
• These valves incorporate an O-ring union seal that requires minimum tightening of the union nut, therefore do not over tighten.
• These valves contain plastic check modules and should never be directly soldered into the line.