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Old 03-01-2010, 11:11 PM   #1
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Basement Remodel - DWV questions.


I'm about to being the build-out of our basement. The bathroom has been roughed in already, so none of those DWVs are a problem. It's the unplanned bar/kitchen sink.

Basically, I have no choice as to where this can be - the design is pretty much set. The only thing close to this area as far as DWV is a floor drain, approximately 10 feet away. I know I have to bust the concrete "downstream" from this drain. I had a guy (supposedly a plumber) come and look at it. He said that he's use this existing floor drain as the vent (?) and then connect the sink drain downstream (where I will have excavated) onto the drain pipe. He noted that this sink will need a vent, as it's serving 2 fixtures (the sink and existing floor drain, I guess). The vent is clear across the basement, but that area is utility, and I should be able to run the pvc.

Ah! A picture is worth 1,000,000 words, I guess...

Pretend the yellow lines denote the new walls. You can see the cabinet (blue) with the sink. Nice art, eh?

I'll run the stuff through the new walls, down to the floor drain area. Not sure what's up after I get there. Anybody know as to what he was talking about? You can't remove a floor drain, can you? Or is his planning on making another floor drain when I excavate, then vent both this and the sink via the sink's new vent?

Here's a shot of where the vent stuff is down there....


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Old 03-02-2010, 07:11 AM   #2
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How about an AAV in the wall by the sink, check with building dept. not all cities allow them.


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Old 03-02-2010, 09:23 AM   #3
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If AAV won't work, you can use a loop vent. It's more pipe and more work, but they should be allowed everywhere.
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Old 03-02-2010, 07:59 PM   #4
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Is there a vent dropped down anyplace in ceiling to connect into?
Id also reccomend the island vent unless you decide to build it against a wall it can be run into,if no future vent is available youll still need to tie into an existing vent above flood level of other fixtures serviced by it
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