Watts 909RPDA-OSY-CFM 4" Reduced Pressure Zone Assembly

Watts 909RPDA 4 inch reduced pressure detector backflow preventer assembly protects from reverse flow of fire protection system substances from being pumped or siphoned into the potable water supply. The assembly consists of an epoxy coated cast iron body, OSY resilient seated gate valves, captured spring check valves, replaceable seats, top mounted test cocks, a pressure differential relief valve and comes furnished with a CFM meter.