The Watts F274496 3/4-inch Boiler Pressure Relief Valve is a safety component designed to protect boilers and hydronic heating systems from excessive pressure buildup. It automatically opens when system pressure exceeds its preset safety limit, releasing excess water to prevent dangerous pressure accumulation. This valve is suitable for residential and commercial boilers, hot water he... https://www.partshnc.com/f274496-watts-174a-34-45-875000-relf-valve