Watts 774DCDA-OSY-GPM 4" SS Double Check Detector Assembly

Watts 774DCDA 4 inch stainless steel double check detector backflow preventer assembly prevents the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. The assembly has a lightweight stainless steel body, thermoplastic, stainless steel check valves and a gallons per minute meter.