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Old 03-06-2008, 10:45 PM   #1
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Under sink picture/ what am I looking at?

Hi there I am getting ready to have granite tops with a large single bowl undermount sink put in and when I was doing a fitting on the new sink it hits the item in the back right of the picture, a vent of some sort. The home is under 5 years old and new construction. It looks like a studor vent which I thought was bad. Question is can I lower the vent piece or relocate it with a 90 bend to the back further?

Thank you
James H


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Old 03-07-2008, 02:19 AM   #2
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You're right. That is an air admittance (aka Studor) vent, and it should be positioned as high as you can get it back under the base cabinet.
I'm not a pro plumber, but I can't see why you can't relocate the AAV back with a 90.
AAV's must be OK with your code jurisdiction, or it wouldn't have passed the building inspection.
I've had an AAV on a downstairs bathroom sink since 1977 with no problems.
Now let the pros comment.
Good luck!


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Old 03-07-2008, 05:03 AM   #3
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2-45s and a nipple will take it back and up between the hot and cold.
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Old 03-07-2008, 02:23 PM   #4
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Doesn't look like you have much room between the water supply lines. I would use 2 45 degree ells and swing it over (probably to the right) and up. It should be installed as high as possible. Cut the riser pipe, leaving enough pipe to connect it into the top 45.
If you have never made a mistake, you haven't done much.
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Old 03-07-2008, 03:29 PM   #5
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Is it just the camera angle or does your garbage disposal drain flow at a downward angle into the adjacent P trap so that ithe water actually has to back up from the p trap to flow into the drain pipe.

Does that p trap clog frequently from ground food building up in there?
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Old 03-07-2008, 08:15 PM   #6
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Hey everyone thanks for the feedback. What I did was cut the one pipe in the middle and then attached a 90 to an 8" section running toward the right rear corner then another 90 and the vent then attached and now it is in the upper right top corner so all should be well. About the other line I had it free and moved down for the picture so it is normally level. I haven't ever had any back up issues as of yet.

Again Thank you
James H


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