Watts 1/2 in. D X 1/2 D Brass Double Check Valve

Dual Check Valves with Intermediate Atmospheric Vent prevent the reverse flow of hot or cold polluted water from entering into the potable water supply. It consists of a brass body with stainless steel internal parts, integral strainer and two durable, tight-sealing, rubber check valves. Designed for continuous pressure, non-health hazard applications in smaller supply lines, such as laboratory equipment, processing tanks, sterilizers, dairy equipment and specifically for boiler feed lines.