Condensed water will run down the evaporator fins to a collection tray below the coil. From there, drain pipes will take this water to a drain. If plastic pipe is used, it should be black to exclude daylight, or slime will grow inside the tube. Drain pipes passing through rooms below freezing point need to be fitted with trace heaters.

Where the outlet drain is higher than the coil, the water needs to be pumped away for disposal. Condensate pumps are fitted to lift this water to drain by gravity. Such pumps are usually of the peristaltic type.

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