Condensation or wastewater is a byproduct of high efficiency furnaces, air conditioning evaporator coils, and flow- through humidifiers. A condensate pump is used to transfer this wastewater to a proper drain.

Air conditioner condensate pumps are a convenient way to collect and dispose of the condensate produced by an air conditioning system when the air handler/cooling coil are located in a building location where the cooling condensate cannot be drained away by gravity. The most common situation is the need to dispose of air conditioner condensate produced by an air handler which is installed in a building basement or crawl space.