How do I handle an iron vertical vent with hub that extends past the stud?

bash_bob

I'm trying to redo my shower. And, I have this sewage vent in the middle of shower wall The pipe doesn't extend past the studs. However, the hub does extend past the studs by 1/2 inch. How should I remedy this? My goal is to be able to screw Durock to the studs. Can I remove the sewage vent on the ground cut the ground, and use something like a ernco hub donut to go to PVC, and bridge that to the copper with a rubber adapter? Would this be code?

Originally asked by Evan Carroll on Stack Exchange (diy) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

Assuming the the iron pipe will unscrew from the bottom you could connect PVC there with a threaded adapter and then connect the PVC to the copper with a trap connector or something like that. I would avoid digging up the slab, the vent stack is probably connected to the branch of a tee. Now I'm asking myself, why is that bronze union there? maybe I'm over-thinking it.

Full answer by Jasen: https://diy.stackexchange.com/a/313339 (CC BY-SA 4.0).

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