A variety of pipes in older homes may be made of galvanized steel. Today, most pipes used are made out of polyvinyl chloride (PVC). To replace these old galvanized pipes, you will need to cut them out of the place they are in and install PVC pipes. Cutting galvanized steel pipe can be tricky because unlike most steel you can cut with a torch, galvanized steel will give off unsafe fumes when cut with a torch. Cutting galvanized steel pipe can be easily and safely done with a pipe cutter.