... , sinks, aquariums, sump pumps, water heaters, and anywhere with potential water damage2) Specification:Working Voltage: 12VMax. working current: ... Control unit 4. electric ball valve(1/4",3/8" 1/2",3/4" and 1" for your ... Sensor LED will light from Sensor 1 to Sensor 8) press the OPEN button to open the valve ... cause false warning sound. Ground water detector system with solenoid valve for stop water leak