Hi, I want to add a toilet in the room next to my current bathroom. I want to leave the original toilet where it is and the other toilet just the other side of the wall. I will need to remove the soil bend that I have and replace with a double. The problem is that the soil stack is connected to the down stairs toilet and also clamped to the wall downstairs and upstairs in the attic. So moving the pipe up to remove and install the new bend is impossible without knocking out all of the boxing in to get at the clamps etc. If I were to cut the pipe above the upstairs toilets remove the bend and replace with a new. Is there some sort of flexi pipe I can buy that will then be able to join the pipe above the bend to the rest of the pipe above? This way I will not have to disturb the pipe clamping and boxing in above or below the new bend.