The Watts 111Z-10 Air Relief Valve is a 1/2 in NPT threaded, float-controlled automatic air vent rated for 15 PSIG service, designed to vent trapped air from closed-loop liquid systems. It automatically removes air pockets to prevent air binding and maintain efficient flow in hydronic heating systems, hot water boilers, chilled water systems, HVAC equipment, circulating pump systems, and process cooling loops. Installation is vertical in closed-loop liquid systems with water or compatible fluids. Typical uses include boiler, HVAC, and process piping systems in commercial, institutional, and industrial facilities.
