First post on this site and I have a feeling I'll be back.
You're looking at the basement floor of a 20 year old house where I plan to add a bathroom. The draining and supply lines are all above, so I think the large 4 inch PVC pipe is for radon. Does anyone know the purpose of the other small lead pipe?
My plan is to reroute the radon pipe through the 2x4 wall, will need to downgrade it to a 3 inch pipe. The lead pipe is in the way, so hoping I can just cut it at the base and seal it. I'm short on square footage in this area, so I didn't want to just box this all in.