I have cast iron sewer line connected to my first floor toilet.. added a new bathroom on my second floor and my carpenter was going to take the cleanout cap off and tie the new pvc into that but we couldnet get it loosened so we heated the lead and removed that from the cast hub , he connected the pvc to the cast hub with a 4x6 fernco... im concerned that where the new pvc meets inside the cast hub at the seam its going to evenually leak and come out around the rubber fernco
am I just being paranoid