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Lead Free* Reduced Pressure Detector Assemblies

Series LF957RPDA, LF957NRPDA, LF957ZRPDA Reduced Pressure Detector Assemblies provide protection to the potable water system from contamination in accordance with national plumbing codes. The LF957RPDA, LF957NRPDA, LF957ZRPDA are normally used in health hazard applications to protect against backsiphonage and backpressure. The Watts LF957RPDA, LF957NRPDA, LF957ZRPDA are used to monitor unauthorized use of water from the fire protection system. They feature Lead Free* construction to comply with Lead Free* installation requirements.


  • Torsion spring check provides lowest pressure loss
  • Lighter than traditional designs
  • Groove fittings allow integral pipeline adjustment
  • Extremely compact design

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF957RPDA

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: