This 4 IN lead-free reduced pressure zone 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 back-siphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from other contaminants found at the service line entrance. This assembly consists of a short lay length lightweight stainless steel body, resilient seated outside stem and yoke shut-off valves, test cocks, corrosive resistant stainless steel bottom mounted relief valve, and a patented cam-check assembly.

SilverBullet™ Reduced Pressure Zone Assembly With OSY, Series/Model: Series 4000SS-OSY, Nominal Size: 4 IN, Pressure Rating: 175 PSI, Temperature Rating: 33 - 110 DEG F, Stainless Steel Body Material, Industry Standards: ASSE 1013, CSA Certified, FM Approved, AWWA C511-92, C/US UL Classified, 40 IN Width, Lead Free: No, Other Physical Dimension: 9 IN Depth, 22-3/4 IN Inlet Center To Valve End

This 1 inch double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards and for contaminants at the service line entrance. This assembly consists of a bronze body construction, NPT end connections, quarter turn ball valve shutoffs, top mounted test cocks, two in-line independent positive seating check modules, captured springs, and replaceable check discs and seats.