I have a dishwasher I never use, there is a hose that runs from dishwasher
to garbage disposal. Some times if there is some material in disposal water
runs back into dishwater, and has on a couple of occasions somehow spilled
out into the basement below....I would like to keep dishwasher connected
because I may want to use on occasion.. How to stop water from running back
The BEST way , ( i can't imagine where you'd put an air gap that was
effective) is to tee the dishwasher line into the sink drain line away from
the disposer. I suspect your disposer is acting somewhat like a pump when
you dump big loads of water and whatever with it on and is forcing the water
back down that little line. If it is a double sink, just tee the dishwasher
line into the other sink line.
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