Daughter's basement has a bathroom with rough plumbing only, done about 20 years ago. The closet flange is 90 degrees in the wrong direction. I tried prying it up with the hope that it was not glued (ABS Plastic) in place. Destroyed flange, and yes, it is glued. Flange is glued to the outside of a 3 inch 'street el'.

My only option is to chip out an inch or two of concrete and hack attempt to hack, carve away at the fitting leaving a reasonably round 3 inch (inside diameter) stub onto which I can properly glue an new flange.

Note that ABS gluing is a full weld and cannot be heated and pealed out unlike PVC. Also note that no tool exists for cutting off the excess from outside of a 3" pipe. They do make reamers to remove an internal glue job. They cost close to $ 300.

Anyway, I need ideas on how to make a tool that I can spin in my heavy duty drill that would "circumsise" this pipe. I am thinking of a piston-like guide that would fit inside the 3" bore with a 'fly-cutter' type tool mounted thereon that would shave off the material on the outside of this pipe.

Any ideas on what I could cobble together real fast would be appreciated. I do have a lathe and a vertical mill. By fast, I mean less than 4-6 hours in tool making because any longer and I could saw cut the concrete, cut off the elbow, glue on ABS fittings and re-patch the floor.

I do own a boring head and am wondering how to machine/attach a guide that would keep the whole assembly honest (concentric).

BTW, plumbing supply stores tell me that no one makes a closet flange that will fit inside a 3" pipe. Only options are 'outside a 3" pipe', or, 'inside a 4" pipe'. Gluing inside a 3" pipe would constrict the turds to 2-1/2" clearance, which does not meet code, ergo nobody makes such a fitting.

Thanks for all advice!



Ivan Vegvary