Deringer 40-BFG 2 1/2" Reduced Pressure Valve Assembly

Deringer 40 is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage. Deringer 40 has butterfly shutoff valves for a short lay length, and dual-action checks for high performance at low and high-flow rates.