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The Watts 9D-SC is a 1/2" dual check valve with Union connections, approved for low health hazard protection. It features a brass body and a rubber seat. Rated to 175 psi and 33°F to 250°F.
This 1/2 inch dual check valve backflow preventer with intermediate atmospheric vent prevents 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, and rubber check valve. It is 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. Minimum working pressure is 25 psi (172kPa), Maximum working pressure is 175 psi (12.06 bar). It has satin chrome finish.
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