... machines, refrigerators, dishwashers, sinks, aquariums, sump pumps, water heaters, and anywhere with potential water damageProtects you home by keeping the leak alert ... unit • Connect central unit to the AC power,(Power LED indicator will light up. Sound one beep and Sensor ... detection of leakage,If more than one Sensor detected water leakage, all corresponding LED will also light up ), then the valve ...