I'm replacing my bathtub. The existing drain pipes for the tub are brass. Both, the overflow drain and bottom drain are pipes are adjustable with compression fittings. I had to cut out (with a grinder) the bottom drain pipe. I only had to cut the part that is extendable (the piece that actually connects to the tub). I need to replace this part but cant find a brass drain pipe for tubs. My question is, can I connect a PVC pipe to the brass pipe and use a compression fitting? Any help would be greatly appreciated.