Closet (Toilet) Flange Removal
I've been combing through the search to try and see if anyone has had a problem like mine and I've gotten some pretty good ideas from it, but I'd like a little bit more help if you guys don't mind. I'm re-doing a bathroom, and I'm on the floor at the moment. The house was built in 1979. The existing floor was a tile layed in a concrete bed with a wire mesh stapled to the floor. I've pulled all of that up, including what was under the exisiting toilet flange.
My first question is how do I tell what material the flange is? All I know for sure is that it's not PVC, it's metal of some form. The main stack in the house is black, so I'm assuming that's cast iron. The downstairs bathroom (which I can see the plumbing for in the basement) has all black pipe running the main the stack. Do you guys think it's cast iron then?
Secondly, this flange isn't level. It's about a half inch higher on one side than the other. It also has a broken groove for one of the two toilet bolts. So it appears that removing it is probably the 'correct' and best way to correct all of these problems. I can not get to the plumbing underneath this bathroom. I really do not want to pull up the subfloor if I can avoid since it's all tounge and groove and it will probably have all sorts of sags afterwards. I saw in some other threads that if I do have a cast iron flange, the lead can be drilled through and the flange can be hammered off. I do not see anything on my flange, at least at the top, that looks like a seam. Nothing appears to be soft either (from scratching it with a screwdriver). The only seam I see looks like it's about 3 or 4 inches down the flange. Any suggestions for removal? I could probably use a hacksaw, but I'll probably be there all week. The flange sits up about a half inch off the floor.
And last, I've seen some discussion on the PVC expansion adapters and 3" v 4" pipes. The I.D. of this flange further down where that seam I mentioned above was appears to be 2.5". Would any of these adapters work?
I was originally just going to try and run the hardibacker and tile underneath the existing flange, but I don't think I can get the material under the one side that is low. Maybe I can just build a platform for the flange and use scrap wood and shims as a base for it and just tile up to that?
Thanks in advance for any help or insights you guys might have