WATTS® 757DCDA-OSY-GPM 8 2497449

This 8 in double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shut-off valves and four test cocks. It has a gallons per minute meter. It features a stainless steel housing and sleeve and is 70 % lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and back siphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water.

WATTS® Double Check Detector Assembly Backflow Preventer, 757DCDA Series, 8 in Nominal, Flanged Connection, 175 psi Pressure, Media: Water, 49-3/4 in Inlet to Outlet Length, Stainless Steel Body, 33 to 140 deg F, Dimensions: 21-3/16 in D

• Outside screw and yoke shut-offs
• Stainless steel for corrosion-resistance
• Lightweight construction
• 150 lb ANSI/AWWA CL D flanged
• Silicone disc

• Instruction/Installation Manual Instruction/Installation Manual
• Specification Sheet Specification Sheet