The Everpure EV950305 Water Block Overflow Safety Part helps protect compatible water filtration systems and connected equipment from excessive water flow. This safety device monitors the volume of water passing through the supply line and automatically restricts or shuts off the flow when it detects usage beyond its preset limit. By helping prevent uncontrolled water delivery, it red... https://partsfe.ca/everpure-ev950305-water-block-overflow-safety-device/2-EV950305.html