... machines, refrigerators, dishwashers, sinks, aquariums, sump pumps, water heaters, and anywhere with potential water damage2) Specification:Working Voltage: 12VMax. working current: ... adaptor12V- CE,UL approval 3. Control unit 4. electric ball valve(1/4",3/8" 1/2",3/4" and ... open the valve.• Once leakage happens, when the water touch the water sensor, the central unit will immediately sound warning ...