Plumbing/venting

[Richard Roshak]

This sink and drain are located in a finished basement. The pipe through the rear of the cabinet is the venting pipe and the one through the bottom is the drain. I thought the vent had to be above the trap? Am I wrong?
Rich

[Scott Patterson]

This sink and drain are located in a finished basement. The pipe through the rear of the cabinet is the venting pipe and the one through the bottom is the drain. I thought the vent had to be above the trap? Am I wrong?
Rich

It is all wrong. You should not have a vent opening below the trap weir, except on a toilet.

[Markus Keller]

It is soooo wrong. Scott is right.

[Michael Larson]

It is all wrong. You should not have a vent opening below the trap weir, except on a toilet.
Here is a diagram of what Scott is saying.


http://www.sweethaven02.com/BldgConst/en5112a0074.gif

[Joshua Hardesty]

Now I believe a vent through the roof is always preferred but haven't they heard of an AAV? It's like these people know enough to try to vent it but absolutely nothing beyond that.