Remodeling and need to remove and shut off old pipes
I am remodeling an old room that at one point must have been a bathroom. I would like to cut the old toilet pipe off flush with the floor and seal it. I do know that it is connected to the septic system. What I need to know, is if there is anything I can pour inside to seal it off without damaging the septic system or how do I level and seal it off to be flush with the other slab, which is concrete, so I can carpet the area and not ever have to worry about a back up there?
THanks