Watts 3/4" 9DM2 Dual Check Valve with Intermediate Atmospheric Vent, Backflow Preventer

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)

True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling
Stainless steel internal parts
Maximum flow at low pressure drop
Furnished with union connections to facilitate removal and replacement for maintenance
Compact for economy combined with performance
Design simplicity for easy maintenance
Can be installed vertically or horizontally