... on.You can place it near toilets, basements, washing machines, air-condition machines, refrigerators, dishwashers, sinks, aquariums, sump pumps, ... heaterCracks DehumidifierConcrete block joints Also widely used for swimming pool, air conditioner, hot water tanks, piping, washing machine, water treatment ... cause false warning sound. Intelligent Pipe water leak detecting instrument (with sensor) WLD-805