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Old 01-12-2012, 02:22 PM   #1
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Ice Machine - Air Gap plumbing

Ok, installing an ice machine in a cabinet spot. 24 inch, gravity drain. I realize this needs an air gap, and understand what this implies. This is on a first floor with a full basement (unfinished) under it.

My solution is to put a floor drain in, flush with the floor, below the ice machine drain. Under the drain, in the basement directly below, to put a p-trap and run 5 feet to the main drain line for my entire home (3.25OD at that point, obviously not running that big on the way there though)

Now, I know this is fine, my question comes to venting. This 5' run will not be vented. However, connected 12" away on that same 3.25OD is another 5' run that goes to a sink that IS vented. Is this fine? Will I have any troubles? And is that code?


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Old 01-12-2012, 09:55 PM   #2
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As you mentioned work fine it will, as for the code that all depends what code you are under, under our code you can run from a vented main, 10’ on a 3” line you cannot connect a non vented waste arm to an existing vented waste arm, if its a vented branch you should be fine,,if I understood your question correctly.
Also the floor drain and air gapped waste cannot be concealed, example ( inside a cabinet )
Good luck.



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Last edited by Javiles; 01-12-2012 at 09:57 PM.
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