Hi All, I'm a diy'er with some experience. I've cut out old extra heavy cast iron from my bathroom during a remodel. The cast was almost closed not even a screwdriver would clear it. So I'm trying to join the 2" xhci to 2" pvc. I used a shielded coupling but since the xh cast is so much thicker it distorts the metal band. I'm considering leading in a 2" soil pipe adapter. From my understanding with Illinois code a donut or compression type gasket cannot be inclosed in a wall. So I'm lost at what to do. I've had a licensed plumber look and say that's ok. But it just looks like a leak in the making.