The House Whisperer checks dishwasher drain cycles and routinely finds 15% of dishwasher drain hoses are blocked with food sludge or are kinked.
This causes water to spray out of the air gap device. What’s an air gap device?
It’s a small cylindrical fixture with slots, that’s installed between the dishwasher and the kitchen sink drain pipe or garbage disposal.
It sits on the sink deck or the kitchen countertop and is designed to prevent dishwasher drain water from flowing backwards into the dishwasher – a good thing since food particle bacteria is present in the drain hose.
If water flows out an air gap device, it’s a red flag.
Usually, there’s food blockage at the garage disposer connection, the drain line is kinked, or the knockout plug in the garbage disposal wasn’t removed during installation.
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