Watts Series LF07S Residential Fire Sprinkler System Dual Check Valves

The Watts Model LF07S Residential Fire Sprinkler Dual Check Backflow Preventer is designed for non-health hazard [i.e., pollutant] application on potable fire sprinkler service connections to protect against possible backsiphonage conditions that could inadvertently drain the fire sprinkler system.

This 0122592 1 1/4 IN dual check valve is designed to prevent the reverse flow of polluted water from residential fire sprinkler systems from entering into the potable water supply. It consists of Lead Free Brass body, Union Female Npt Inlet X Male Npt Outlet connection, silicone seat disc, union seals and captured stainless steel springs.  The minimum working pressure is 10 psi (0.69 bar). The maximum working pressure is 175 psi (12.1 bar).