850U-QT 1/2

This 1/2 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. The compact modular design for easy maintenance has 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. The assembly consists of a bronze body construction, quarter turn ball valve shutoffs, union end connections, top mounted test cocks, captured springs, two in-line independent positive seating check modules, replaceable check discs and seats.