The Pressure Vacuum Breaker Backflow Preventer shall consist of two independently operating spring loaded check valves with a vacuum breaker air inlet head mounted on the second check and three testcocks. An inlet gate valve and outlet gate valve comprise a complete serviceable device. The 3″ and 4″ devices shall consist of two inline bronze bodies, covers, and vacuum breaker head assembly. Corrosion resistant internal parts standard. The 6″ through 10″ devices consist of two independent “Y” pattern cast iron spring loaded check valves and one bronze bodied vacuum breaker head. Internal epoxy coating is standard and all internal parts are corrosion and wear resistant. Gate valves supplied are flanged non rising stem. Both check valves and vacuum breaker head shall be constructed so they may be serviced without removing the device from the line.
3″, 4″, 6″, 8″, 10″