Conecting ABS to Cast Iron
I have a 2" drain pipe under my sink. It comes out too far (4" long piece). I have no room for the disposal. It is made of cast iron (I assume) and is threaded on both ends. I tried removing it and could not I used a large pipe wrench and a metal mallet it wont budge. The house is from 62 and I am sure the pipe is as well.
So my new plan is to sawzall the pipe down to an inch stub and place an abs piece that slips over the metal pipe and is threaded on the other end. From there I can install the rest of the ABS and the P Trap and such.
My question is how do I connect from the metal to the plastic? ABS Glue? Plumber's Dope?
Any problems you guys foresee? The original plan was to use that same adapter piece but in reverse, screw the threaded side in to the wall and stick in abs on the other end. If somehow I do this again what do I use to connect the plastic to the metal.