... the signProvides reset switch to stop alarmUsually suitable for underground reservoir of high building SPA and so ... You can place it near toilets, basements, washing machines, air-condition machines, refrigerators, dishwashers, sinks, aquariums, sump pumps ... water heaterCracks DehumidifierConcrete block joints Also widely used for swimming pool, air conditioner, hot water tanks, piping, washing machine ...