This Colt™ 4 inch double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure. It is ideal for protection at cross-connections identified as non-health hazards, such as on fire sprinkler systems and from other contaminants found at the service line entrance.

Features

• Extremely compact design allows for smaller vaults and enclosures
• Approximately 70% lighter than traditional designs
• 304 (Schedule 40) Stainless steel housing and sleeve for long-term corrosion protection and maximum strength
• Groove fittings allow integral pipeline adjustment
• Patented Tri-Link Check provides the lowest pressure loss
• Unmatched ease of serviceability with a single access sleeve
• Includes outside stem and yoke resilient seated gate valves (OSY) shutoffs
• Replaceable check disc rubber
• Comes furnished with a gallon per minute (GPM) meter to detect underground leaks and unauthorized water use

Installation & Configuration

• Approved for horizontal, vertical, or N pattern installations
• Includes an integrated supervisory switch as an option on each gate valve of the OS&Y model

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 standard material product, consult your local water authority, building and plumbing codes.