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The air gap also serves as a vent to help the dishwasher drain and as an overflow device if the main drain line gets clogged. The slots in the air gap should always be facing the sink basin since facing the slots away from the sink basin could cause water damage to the countertop or the floors.
Note that we did not remove the dishwasher or any part of the dishwasher to look under or behind it. It is highly likely that if you remove the dishwasher (such as during remodeling), there will be some moisture damage and/or mold growing under or behind it. Such conditions are quite common due to the inherent nature of dishwashers in that they use both hot and cold water supply lines and electrical drying elements, sometimes resulting in water supply line leaks, drainage leaks, or in the dishwasher sweating. |
Dishwasher draining through air gap. |
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