I need to move a toilet 6 inches to the left, and best thing to do with the waste pipe seems to cut it back to the wall, as it sticks out about 8 inches, then use one of those bendy waste pipe connectors. Thing is its an old victorian house and I am not even sure what the waste pipe is made of or how to shorten it. If it were modern plastic there would be no problem but it looks old and I don't want to mess it up. Any suggestions?