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Old 12-26-2012, 10:15 PM   #1
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Drain Configuration Question


Hi,

I am about to get started on my plumbing for the basement project. This will begin with plumbing the drains for the dishwasher/sink with disposal, washer, and vanity/lav drain.

Please reference my novice sketch and let me know your opinions.

(What I am looking for is wether the "stack" order I have drawn is adequate)

Thank you in advance.
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Last edited by oodssoo; 12-27-2012 at 11:18 AM.
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Old 12-27-2012, 10:41 AM   #2
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Drain Configuration Question


If those are all dumping into the same vertical piping, what you have there is called a wet vent. I'm not sure if that's allowed in your area, but it sure as heck isn't allowed where I live. (UPC Based code)

Then again, your drawing is somewhat incomplete... hard to tell exactly what you plan on doing.

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Old 12-27-2012, 10:52 AM   #3
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Thats a major over a minor. The washing machine pumps alot of water fast. Dont install a major over a minor.
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Old 12-27-2012, 11:15 AM   #4
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Quote:
Originally Posted by hammerlane View Post
Thats a major over a minor. The washing machine pumps alot of water fast. Dont install a major over a minor.
Thank you, Hammerlane!

So, let me get what you are saying correctly... Are you suggesting that I have the following setup?

(from top down)

A: Vanity/Lav drain (minor)
B: Kitchen sink/dishwasher drain (major)
C: Washer drain (major)

Please advise.

Ps. Alan, I plan to use Air Admittance Valve (AAV) to vent my kitchen and vent my washer and vanity out the air vent pipe (which I believe is 2").

Last edited by oodssoo; 12-27-2012 at 11:17 AM.
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Old 12-27-2012, 11:33 AM   #5
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Drain Configuration Question


I think you need to clarify: are these all dumping into one main stack drain on the same floor?

If so, what distances are each of these from the main stack? Why can't you re-vent to avoid wet venting?

Give us a little bit more of an idea of what is going on.

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