The Watts Series 957NRPDA Reduced Pressure Detector Assembly with flood sensor provides protection against back-siphonage and backpressure in potable water systems, particularly for health hazard applications, and monitors unauthorized water use from the fire protection system.

This 8 inch N pattern assembly features a stainless steel body, OSY shutoff valves, and a cubic feet per minute meter, all in an extremely compact design that is 70% lighter than traditional models.

Safety 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. Always consult your local water authority, building, and plumbing codes before installation.

Key Features

• Provides backflow protection for health hazard applications from back-siphonage and backpressure.
• Equipped with a flood sensor featuring SentryPlus Alert® technology to detect excessive water discharge from the relief valve.
• Requires an add-on connection kit to activate the flood sensor for notifications via BMS, cellular communication, or Nexa® platform through Wi-Fi.
• Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for durability.
• Features domestic outside stem and yoke (OSY) resilient seated gate valves that are UL Classified and FM Approved.
• Includes a cubic feet per minute (CFM) meter to detect underground leaks and unauthorized water usage.
• Extremely compact design, up to 70% lighter than traditional designs, allowing for smaller enclosures.
• Patented torsion spring check provides the lowest pressure loss.
• Groove fittings allow for integral pipeline adjustment and unmatched ease of serviceability.
• Corrosion-resistant, bottom-mounted cast stainless steel relief valve.
• Replaceable check disc rubber for easy maintenance.