I've got a question. My wax seal started to leak on my toilet (after 20 years). I decided to take the task on myself. I removed the toilet and the old wax gasket. Well, the flange had obviously seen better years so I decided that I was going to replace that as well. Now, I removed the old metal flange ring and I cannot get the pvc portion that connects to the drain to come off. I don't see any glue but I'm stuck. Any suggestions?