Plumbing – How to Vent a Double Kitchen Sink from S Trap to P Trap with AAV

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I'm replacing my double kitchen sink and replacing an S trap with a P trap. There is no vent nearby that I can tie into easily, so I'm going with an under sink AAV. Issue is, I don't have much space between the current s trap and where the drain ties into (through the floor):

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Here are some ideas I had to fit a P trap and AAV on here:

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I ran out of parts, but my idea is to use 90 degree elbows to circle back to the drain in the floor, and use another 90 pointed down or a j bend to get it into the drain.

Would that solution work without the risk of code violations?

Or would this configuration work better?
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Thank you for the advice!

Best Answer

In your 4th photo you have the sanitary tee oriented improperly ( horizontally instead of vertically ) but in your 6th photo you have it correct ( but you have an incorrect fitting on the top ).

The sanitary tee will sit on the straight drain pipe going down through the bottom of the cabinet, it will accept the pipe coming from the trap. Depending on space you may not need to take such a circuitous route to get the trap outlet into the san tee. ( Meaning you may not need the 90 elbow going into the san tee, the trap swivels and you can cut the pipes to try and make a straight run to the san tee )

For the AAV you can come off the top of the san tee and then 90 over to the side of the cabinet and then 90 up so the AAV can go up between the side or back of the bowl and the cabinet ( anywhere there is room for it. )

It needs to be a high as possible. Put a threaded connection just after the 90 that turns up so you can pull it out if you need to change or service the AAV in the future.

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