0438139 (Watts) | 4 Inch | SS Double Check Detector Assembly Backflow Preventer | Osy Shutoffs | No Meter | Short Lay LengthThis 4 IN Double Check Detector Backflow Preventer Assembly Prevents The Backflow of Fire Protection System Substances From Being Pumped or Siphoned Into The Potable Water Supply. It Consists of a Compact Construction And Short Lay Length, Ideal For Retrofit Installations. It Features a Lightweight Stainless Steel Body, Thermoplastic And Stainless Steel Check Valves, And Low Head Loss. It Has Outside Stem And Yoke Shutoffs. It Can be Installed in a
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0438139 (Watts) | 4 Inch | SS Double Check Detector Assembly Backflow Preventer | Osy Shutoffs | No Meter | Short Lay Length