I need to connect my new 1 1/4" PVC drain/trap to the existing copper pipe coming out of the wall. I have 1 1/4" copper, then a fitting, then a 2" copper pipe which goes into the wall. Attempted to rubber boot the 1 1/4" PVC to the 1 1/4" copper but that leaked. How do I do this properly? How do I get the fitting off if I need to connect to the 2" copper?