Watts Lead-Free Brass Vacuum Relief Valve, MNPT Inlet Type, MNPT Outlet Type – 1/2 LF N36
Automatically vents closed system to atmosphere, this WATTS vacuum relief valve helps prevent vacuum conditions that could siphon water from the system. Suitable for use with domestic water heaters, tabletop heaters, supply tanks, steam coil heaters, unit heaters, jacketed steam kettles, and low-pressure steam systems.