This 3 inch Watts Series 957ZRPDA Reduced Pressure Detector Assembly is designed to protect potable water systems from contamination due to back-siphonage or backpressure, primarily in health hazard applications. It also monitors for unauthorized water use from fire protection systems and features a flood sensor to detect excessive water discharge from the relief valve.

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

• Extremely compact design, approximately 70% lighter than traditional models, enabling use in smaller enclosures.
• Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for durability.
• Groove fittings facilitate integral pipeline adjustment.
• Features a patented torsion spring check design for lowest pressure loss and unmatched ease of serviceability.
• Equipped with UL Classified and FM Approved grooved gear operated butterfly valve shutoffs with tamper switch.
• Includes a bottom-mounted cast stainless steel relief valve.
• Incorporates a metered bypass to detect leakage or theft of water from the fire sprinkler system.
• Integrated flood sensor with SentryPlus Alert® technology on the relief valve to detect and signal excessive water discharges, limiting flooding and costly damage.
• Designed for horizontal Z-pattern installation.
• Furnished with a gallon per minute meter.

NOTICE: An add-on connection kit is required to activate the flood sensor's communication capabilities. Without it, the sensor is passive. Watts is not responsible for alert failures due to connectivity issues, power outages, or improper installation. The flood sensor does not replace the need to comply with all required installation, operation, and maintenance guidelines, including providing proper drainage.