The Fulton Boiler 2-40-000420 Low Water Safety Relay is a vital safety control designed to protect boiler systems from low-water conditions. It works by monitoring water level signals and automatically shutting down the boiler when unsafe levels are detected, preventing overheating and potential equipment damage. This relay is used in commercial and industrial Fulton boilers within HV... https://www.partshnc.com/2-40-000420-fulton-boiler-low-water-safety-relay