Watts 9D-M2 3/4" Dual Check Valve

Watts 9D-M2 3/4 inch dual check valve backflow preventer with atmospheric vent helps prevent the reverse flow of hot or cold polluted water from entering into the potable water supply. The body has a brass with stainless steel internal parts, integral strainer, two durable tight seating rubber check valves, and NPT female inlet and outlet connections.