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float valve until the water level in the trough closes the valve. During the icemaking stage, water is
pumped from the water trough to the water distribution tube. The distributed water flows over the
surface of the cold evaporator where the purest water is converted to ice. The unfrozen water
returning to the trough. At the end of freeze cycle and during harvest, the water dump valve is
opened and the mineral laden remaining water is pumped down the drain.