The Watts LF757 is a lead-free double check valve assembly designed to protect potable water supplies from contamination due to backpressure or backsiphonage. Ideal for non-health hazard applications, it features a compact, modular design with top-entry access for easy maintenance. Constructed with a lead-free cast copper silicon alloy body and chloramine-resistant elastomers, it ensures durability and compliance with national plumbing codes. The assembly includes replaceable seats and seat discs, reversible seat disc rubber to extend check valve life, and top-mounted test cocks for convenient testing.

Technical Specifications:

• Size Range: 2½" – 10"

• Materials:

  • Body: Lead-Free Cast Copper Silicon Alloy

  • Sealing Elements: Chloramine-Resistant Elastomers

• Pressure Rating: 175 psi (12.06 bar)

• Temperature Range: 33°F – 180°F (0.5°C – 82°C)

• End Connections: NPT

• Features: Top-entry check valve design, replaceable seats and seat discs, reversible seat disc rubber, top-mounted test cocks