3000SS-DNRS-GPM 2 1/2

This 2 1/2 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 in accordance with national plumbing codes and water authority requirements. It is ideal for providing protection at cross-connections identified as non-health hazards such as on fire protection systems as well as from other contaminants found at the service line entrance. The compact modular design with a single access cover allows for easy maintenance and is approved for horizontal and vertical flow up installation. It consists of a light weight stainless steel body, domestic NRS gate valves, torsion spring check valves, a gallons per minute metered bypass to detect underground leaks and unauthorized water use, and four test cocks.