The Watts LF774 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 lightweight stainless steel body, it includes spring-loaded cam-check valves, resilient seated gate valves, and test cocks. The LF774 is suitable for horizontal, vertical, and retrofit installations, offering versatility and reliability in backflow prevention.

Technical Specifications:

• Size Range: 2½" – 12"

• Materials:

  • Body: Lead-Free Stainless Steel

  • Check Valves: Thermoplastic and Stainless Steel

  • Gate Valves: Non-Rising Stem Resilient Seated or OSY Flanged

• Pressure Rating: 175 psi (12.06 bar)

• Temperature Range: 33°F – 110°F (0.5°C – 43°C)

• End Connections: Flanged per ANSI B16.1, Class 125

• Features: Compact design, top-entry maintenance, low head loss, approved for horizontal and vertical installations