ASSE 1048|AWWA C551-92|CSA B64.5|cULus Listed|FM Approved

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

This 4 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 cubic foot 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. The maximum working pressure is 175 psi (12.06 bar).