How to Replace Polybutylene Piping with PEX
Ask This Old House plumbing and heating expert Richard Trethewey travels to Richmond, Virginia to help a homeowner replace her polybutylene piping with conventional PEX
- Start by identifying and locating the pipes in the wall. Your contractor should devise ways to remove the pipes while minimally disrupting the space.
- Cut access holes where necessary to remove the pipes.
- Shut the water off to the house and open all the faucets in the house to remove any water remaining in the pipes.
- Cut and remove all the polybutylene piping from the house.
- Run new PEX piping through all the locations where the polybutylene used to be.
- Connect the pipes using PEX fittings and the expansion tool.
- Turn the water back on.
Polybutylene pipes are no longer to code and need to be replaced by a licensed professional. Richard was assisted by Capital Mechanical.
The tools and materials required to replace the pipes, including the PEX lines, fittings, and the expansion tool, can all be found at home centers and plumbing supply houses. The PEX piping for this project was supplied by Uponor.