... dishwashers, sinks, aquariums, sump pumps, water heaters, and anywhere with potential water damage2) Specification:Working Voltage: 12VMax. working current: ... pool, air conditioner, hot water tanks, piping, washing machine, water treatment.... 4) Top 5 Places to install water ... metallic objects that may cause false warning sound. Intelligent Pipe water leak detecting instrument (with sensor) WLD-805