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Re: dishwasher drain vent

Posted By: Phil
Thursday, 12 July 2001, at 6:26 a.m.

In Response To: dishwasher drain vent (mike)

An air gap protects your dishwasher against water backing up into it if a drain clogs. Not all plumbing codes require air gaps. Not every new dishwasher comes packaged with an air gap fitting. I installed a brand new GE diswasher, sink and fawcet in the summer of 99. I did not install an air gap. I connected the drain line directly into the waste disposal and I used the hole in the sink to put in a soap dispenser. I haven't had any problems with water backing up into the dishwasher. By the way, you can buy a fawcet with a built-in aerator, thus freeing the hole for a soap dispenser. It's neat. Check the drain line around the kitchen and see if you have an exteral line vent over the drain line. Sometime it's on the ground outside the house, and sometime its inside a wall with the pipe sticking out over the roof. I'll say, if you have an external vent, go ahead and remove the air gap and install the aerator. Monitor the dishwasher from time to time for water backup.

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