“This was just delivered. Plummer told us we needed a counter top air vent to pass code. Husband said it looks like air gap is built in. Does this dish washer have a built in air gap?”
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All you have to do is make sure the drain hose rises above the drain on the machine and then goes back down to the under sink connection. Much like a P-trap works. There is another device you can use, but I have never found it necessary. If your old machine worked there, your new one will.
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