Condensate Pumps. Little Giant and Liberty Condensate removal drain sump pumps dispose of air conditioning & refrigeration condensation, and the waste water from drinking fountains, humidifiers, ice makers, beverage machines and gas furnaces.These condensate pumps compare to Beckett and Hartel condensate pumps. Condensate is produced at a rate of up to a gallon per hour by a residential central air conditioning unit or gas condensing furnace. The condensate is gravity fed from the appliance drain into one of the inlet ports of the condensate removal unit. A tubing is connected from the pump check valve to a drain line, sump, french drain or laundry sink. The "Head" is the height the pump is required to "raise" the water. The "run" is the distance the water travels horizontally once the height is reached. The "run" does not affect the head or flow rate unless it exceeds 50 feet. "Runs" of 50' or more will decrease pump output by about 10%. The auxiliary safety switch should be wired to shut down the appliance in the event of a pump overflow. Pump overflow can be caused by a blocked discharge line, power loss to the pump, or pump malfunction. The switch can be wired in-line with the thermostat to shut down the appliance; or wired directly to an alarm.