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Old 09-15-2015, 04:58 PM   #1
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Adding auto vent under sink


I am wanting to add an air admittance valve under my kitchen sink which currently is not vented. I did not want to pay the $160 that the plumber wanted for this job, so I am hoping somebody can walk me through this. I am looking at the Oatey sure vent AAV installation kit from Menard's.
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Old 09-15-2015, 05:01 PM   #2
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Where the 90 is at install a tee. From the side of the tee install a trap adaptor. Then install a 4 inch piece of pipe on top of the tee and your AAV valve. Use PVC primer and PVC glue.
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Old 09-15-2015, 05:35 PM   #3
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So a sanitary tee right after the p-trap or at the 90 going down to the floor. Also, what is a trap adapter?
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Old 09-15-2015, 05:41 PM   #4
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Quote:
Originally Posted by saxsquad29 View Post
So a sanitary tee right after the p-trap or at the 90 going down to the floor. Also, what is a trap adapter?
this is a trap adapter.....does your plumbing code allow aav,,,
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Old 09-15-2015, 06:58 PM   #5
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You will have to remove the 90 and install a few fittings.
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Old 09-15-2015, 08:16 PM   #6
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So basically something like this drawing.
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Old 09-16-2015, 12:44 PM   #7
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Quote:
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So basically something like this drawing.
This is the basic layout correct?
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Old 09-16-2015, 02:38 PM   #8
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yepper
Use the same plastic fittings and glue and primer. Teflon tape on the studor threaded connection so you can replace once it fails.
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Old 09-17-2015, 03:07 PM   #9
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Check your local building code for how high the aav can be. It looks like you've got the correct layout.

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Old 09-17-2015, 03:32 PM   #10
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Check your local building code for how high the aav can be. It looks like you've got the correct layout.

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Why would there be restrictions on how high? As long as it's so many inches above the trap. You would think the higher the better?
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Old 09-17-2015, 03:57 PM   #11
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The engineering documents set the height above the trap they want a minimum of 4 inches. The AAV still relies on a rubber diaphragm to work if it gets coated in stuff it will no longer seal on a positive pressure and allow sewer smell into the living area.
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Old 09-17-2015, 04:01 PM   #12
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Quote:
Originally Posted by saxsquad29 View Post
Why would there be restrictions on how high? As long as it's so many inches above the trap. You would think the higher the better?






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The engineering documents set the height above the trap they want a minimum of 4 inches. The AAV still relies on a rubber diaphragm to work if it gets coated in stuff it will no longer seal on a positive pressure and allow sewer smell into the living area.
But there shouldn't be any restrictions on the max height above, right? As long as its 4" above I should be okay
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Old 09-17-2015, 04:02 PM   #13
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We don't have any upper height restriction under IPC. Just the 4 inch lower height.
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