Step 3 · Accessing the Pipes
To replace the pipes, you must first access them. Use a stud finder to locate the wall studs on either side of where the pipes run. This allows you to make clean cuts and provides a solid surface for reattaching the drywall later. Using a drywall saw or utility knife, carefully cut rectangular sections of drywall to expose the polybutylene pipes. Make your cuts neat and try to save the removed pieces. Be extremely cautious of any electrical wiring or other utilities that may be hidden in the wall cavities. Wear safety glasses and a dust mask to protect yourself from dust and debris.