Hoffman Specialty Watchman condensate pumps are designed to collect condensate and return it to the boiler. As condensate flows to the receiver tank, it fills with water. The float switch assembly then rises and signals the motor on the pump to start and begin pumping the condensate. When the float drops with the lower water level and breaks the contact on the switch, the pump will shut off. This Watchman condensate unit features a corrosion-resistant cast iron receiver with low inlet heights for ease of installation. The centrifugal pump is close-coupled and vertically-mounted with a bronze impeller. The WC6-20B has a 3/4" connection and a 1/3 HP, 3450 RPM, 115v single phase motor. The WC6-20B is a simplex unit, with a 6 gallon tank, capable of pumping 9 gallons per minute at 20 psi and 6,000 EDR.