I had to remove the 2″ galvanized lead pipe from my kitchen drain to change over to PVC. When I opened the wall, I saw that 1. the plumber never vented the pipe and 2. it was reduced from 2″ to 1.25″ pipe. This constricts even more airflow and could cause slow drainage. Weird. So I cut it with my angle grinder and capped it with a Fernco Pipe cap and we are going to abandon it. I will run new PVC up to it from the vented lav run that I did back in November. We had a friend of ours refer us to a professional taper. He finishes drywall for the union and let me tell you he is amazing. The ceiling went up Sunday and I can almost paint on Sat. He is waiting for me to hang the rest of the drywall later today. Its really coming together so fast!