The 3 inch vent stack going through my bathroom wall to the attic is wider than my wall at the joints...So, I wonder how this went when the drywallers came in? Did they talk the to the plumbers? The builder? Whoever they talked to about it didn't make them correct it so they just drywalled over it and either left a bow in the wall or they didn't screw it in all the way.
I guess the quick fix would be double drywall with a hole in the first layer...Any other suggestions?



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the pipe measures 3 1/2 inches outside dimension but the OD of a fitting is 4 inches.
doubling up the drywall will make it quieter and more fireproof.

Or furr out the studs with 1x lumber will give you another 3/4".

That is the way they do it. We CANNOT make the pipes any smaller, and the builders cannot make the studs wider.

You can gouge out the backside of the dry wall to get some additional space and it's not visible from the exposed face. The stud to the right of the vertical pipe has a nail hole right above the top of the level(and no nail plates protecting that horizontal pipe), so it appears to have been nailed.