Watts Dual Check w Atmospheric Vent 9D 3/4 9D-M2-3/4

Series 9D 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. Series 9D 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: 25psi (172kPa), maximum working pressure: 175psi (12.1 bar). made in United States. Manufactured by Watts regulator company.