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 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.