Watts Series 757 Double Check Valve Assembly 

Series 757, 757N Double Check Valve Assemblies are used to prevent backflow of non-health hazard pollutants that are objectionable but not toxic, from entering the potable water supply system. Series 757, 757N may be installed under continuous pressure service and may be subjected to backpressure and backsiphonage. Series 757, 757N consists of two independently operating check valves, two shutoff valves, and four test cocks.

This 0111758 3 inch double check valve assembly consists of a stainless steel body, tri-link check valves, quarter-turn ball valve shutoffs with lever handles, and test cocks.

Features: 

• Extremely compact design
• 70% Lighter than traditional designs
• 304 (Schedule 40) Stainless steel housing & sleeve
• Groove fittings allow integral pipeline adjustment
• Patented tri-link check provides lowest pressure loss
• Unmatched ease of serviceability
• Available with grooved butterfly valve shutoffs
• Available for horizontal, vertical or N pattern installations
• Replaceable check disc rubber
• Sizes 2 1⁄2", 3" and 4" (65, 80 and 100mm) available with quarter-turn ball valve shutoffs