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benleef 12-03-2012 12:10 PM

AAV under island sink
 
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My in-laws have an island sink. It drains slowly, I believe an AAV under the sink will help greatly. The issue is, the vertical pipe from the basement comes up and then a 90 turn to horizontal run of about 12" then another 90 turn and a horizontal run for 8" and then the trap.

The only easy place to put a T to an AAV would be after the second ninety, right before the trap---would this be OK?

hammerlane 12-03-2012 12:44 PM

Quote:

Originally Posted by benleef (Post 1065482)
The only easy place to put a T to an AAV would be after the second ninety, right before the trap---would this be OK?

Did you take the trap apart and see if there was any clogs?

You cannot use an AAV horizontal. Needs to be vertical or I think no more than 15 degrees from the vertical.

benleef 12-03-2012 01:28 PM

There are no clogs.

The T would be vertical not horizontal. Is it OK if it is vertical after a horizontal run, as long as it is before the trap?

Thanks!

TheEplumber 12-03-2012 04:37 PM

Quote:

Originally Posted by benleef (Post 1065524)
There are no clogs.

The T would be vertical not horizontal. Is it OK if it is vertical after a horizontal run, as long as it is before the trap?

Thanks!

Best place for it is at the vertical to horizontal 90. If you can't replace that 90 with a tee- AAV on top then any place after that and before the trap will have to do

benleef 12-03-2012 05:12 PM

That is what I figured. Thanks!


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