I have an open 1.5" drain pipe in the wall. I just need to redirect it through the (currently non-existing) drywall and put in a trap. What is the proper way to do this? Do I just put a 90 degree EL on the pipe?
Also, I noticed that most traps are 1.25" instead of the 1.5" of drain pipe that I have. Do I just step my drain from 1.25" to 1.5" and call it a day or is there some special way to do this properly?
Is PVC or some other material preferred? What else do I need to take into consideration?