Skip to Main Content

957RPDA Watts

Reduced Pressure Detector Assemblies, Stainless Steel

Series 957RPDA, 957NRPDDA, 957ZRPDA Reduced Pressure Detector Assemblies prevent the reverse flow of fire protection system substances from being pumped or siphoned into the potable water supply. The 957RPDA incorporates a meter to detect ground leaks and unauthorized illegal taps, greatly reducing annual water expenses. It consists of a compact, stainless steel body with stainless steel internal parts, two check valves, a pressure-differential relief valve, shutoff valves, torsion spring checks and relief valve, and bronze, nickel-plated test cocks. Series 957RPDA, 957NRPDDA, 957ZRPDA is 70% lighter than traditional designs and is ideal for health hazard cross-connection, such as on fire sprinkler systems. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).


  • Groove fittings allow integral pipe adjustment
  • Extremely compact and light design
  • Torsion spring checks provide lowest pressure loss
  • Available with quarter-turn ball valve shutoffs or grooved butterfly valve shutoffs

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 957RPDA

Approval Information

For the latest product certification information and documentation, please visit our certification partner websites: