Toilet Flange Problem

I have a 3" ABS pipe that is already plumbed in for my toilet (sticking out of a concrete floor). The problem is, there is an elbow about 1 1/4" below the finished floor preventing me from installing the flange flush with the floor because the flange lip is about 1 3/4" deep. Would I be better off to cut 1/2" off the flange lip leaving less glue surface or I have also seen flanges that slip inside a 3" pipe but I don't know if these are ok.

I appreciate any opinion you may have.

Do not use a flange that slips into a 3" pipe. This will reduce the size of the drain below minimums. It would be OK on a 4" pipe, but not the 3". I'm not a pro, so don't take this as an OK, but I think you would be OK to cut 1/2" off the flange. Remember, the flange rests on top of the finished floor, not the subfloor.

or you could use a marble slab to set the toilet on raising the "finished" floor under the toilet by 1/2". I have this setup in a powder room with a hardwood floor.

The depth of the flange is 1 1/2 inches so you are close. Cut off 1/4 to 1/2 inch , use lots of glue.

I'm not a big fan of cutting portions of a hub off. The more gluing surface you have, the less likely of a leak. 1/4" probably wouldnt be a big deal though. However, if it were my house, I'd set the toilet on a 1/2" marble slab and be done with it.

Good luck

Thanks everyone. I will consider my options...

Charles