The 6 inch Watts 957RPDA Reduced Pressure Detector Assembly is a backflow preventer designed to protect potable water systems from contamination due to backpressure or backsiphonage where health hazards exist.

This compact assembly is ideal for monitoring unauthorized water use from fire protection systems and detecting excessive water discharge.

Primary Function

• Provides protection against back-siphonage and backpressure contamination.
• Monitors for unauthorized water use and underground leaks using a cubic feet per minute meter.

Construction & Design

• Features an extremely compact design, significantly lighter than traditional assemblies.
• Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for corrosion resistance.
• Includes two independent torsion spring check modules and a differential pressure relief valve.
• Equipped with UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
• Groove fittings allow integral pipeline adjustment and offer unmatched ease of serviceability.
• Patented torsion spring checks provide lowest pressure loss.
• Reversible elastomer discs ensure drip-tight closure.
• Features a bottom mounted cast stainless steel relief valve.

Flood Detection Features

• Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
• When paired with an add-on sensor connection kit, the sensor activates to relay alerts for potential flooding events.
• Compatible with BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform via Wi-Fi connectivity.

A WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing, consult your local water authority, building, and plumbing codes.