This Colt™ 4 inch reduced pressure detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and non-potable quality water from being pumped or siphoned into the potable water supply due to backsiphonage and backpressure.

This compact, modular assembly is approved for horizontal N pattern installation and includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

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

Key Features

• Extremely compact design, approximately 70% lighter than traditional models
• 304 (Schedule 40) stainless steel housing and sleeve with quick access
• Groove couplings allow for easy installation and pipe alignment
• Patented link check for lowest pressure loss and unmatched ease of serviceability
• Equipped with OSY (Outside Stem and Yoke) resilient seated gate valves and test cocks
• Corrosive resistant bottom-mounted pressure relief valve
• Includes a gallon per minute meter to detect underground leaks and unauthorized water use
• Flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve
• Flood alert feature activated by an add-on sensor connection kit (sold separately)
• The OS&Y model includes an option for an integrated supervisory switch on each gate valve