The Utica-Dunkirk 240007708 48" Water Sensor is a reliable safety component designed to detect the presence of water and help protect HVAC and boiler systems from leaks or overflow. It works by sensing moisture through its 48-inch sensor lead and signaling the connected control system to trigger an alarm or shut down equipment when water is detected. Commonly used with boilers, hydron... https://www.partshnc.com/48-water-sensor