... .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 ... the Water Heater Under the RefrigeratorHow to use• Put the water sensor on the place where water leakage may ...