Replacing lead toilet drain and flange
The floor around the old toilet flange is completely rotten and cannot hold screws for the flange. The flange is steel, however in cutting the floor open the two feet of 4 inch drain is not cast iron. Actually, I accidentally cut into this pipe while opening the floor and is seems to be lead (very soft and less than 1/8 inch thick). It is formed as one piece from the toilet flange, into a 90 degree bend and runs horizontally about two feet and T's into a cast iron vertical sewer drain/stack. Tapping along the drain, there seems to be a more solid piece about 1 1/2 inches coming out of the T, like a nipple, and the 'lead' pipe is over top of this. Likely this harder (CI ?) 'nipple' adds strength for the joint. The lead lip of the lead pipe has come loose from the floor flange, but possible could be tapped back around the flange and an expandable new plastic flange installed over top, after a new piece of sub-floor is installed.
My preference is to cut the lead pipe at the end of the solid 'nipple' at the T , install a Fernco and continue with ABS to a new ABS floor flange. The Fernco would go over the remaining piece of lead and be supported by the harder CI or whatever it is, beneath the lead. Is this possible and if so, would this joint leak being a horizontal fitting. What would be the proper Fernco to use?
Last edited by klondiker; 02-16-2012 at 12:43 PM.