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Old 12-03-2012, 11:10 AM   #1
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AAV under island sink


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?
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Old 12-03-2012, 11:44 AM   #2
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AAV under island sink


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Originally Posted by benleef View Post
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.


Last edited by hammerlane; 12-03-2012 at 11:51 AM.
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Old 12-03-2012, 12:28 PM   #3
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AAV under island sink


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!
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Old 12-03-2012, 03:37 PM   #4
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AAV under island sink


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Originally Posted by benleef View Post
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
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Old 12-03-2012, 04:12 PM   #5
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AAV under island sink


That is what I figured. Thanks!
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