Is Copper or PEX Better for a Repiping Project?
Repiping a home is no small task. Whether homeowners go through a professional or they’re bravely undertaking the job themselves, at some point, they’ll need to commit to a pipe material.
The drainage system is easy - PVC is the standard material for drain pipes, and doesn’t seem to be going anywhere. But for the water supply system, PEX piping is gaining popularity over the reigning king, copper.
Key Differences Between PEX and Copper
Cross-linked polyethylene, or PEX, is a type of strong, flexible plastic. Though newer to the plumbing scene, its flexibility and ease of installation has made it very popular among plumbers and DIY-ers alike. It is lightweight, easy to transport, and relatively inexpensive. PEX typically comes with a manufacturer warranty of 25 years.
When it comes to water supply pipes, copper has been the go-to material for nearly a century, and it is still used in the construction of most new homes. Aside from a few short, flexible segments installed at certain fixtures like washing machines, residential copper piping is hard and rigid. This quality makes it more difficult to install. Copper is somewhat expensive, but usually includes a manufacturer warranty of 50 years.
Strengths and Weaknesses of PEX Pipes 
PEX can be snaked through existing walls, tight spaces, and around sharp corners, giving it a distinct advantage over copper. Installation of PEX involves very few cuts and no joint connectors or welds. Every pipe leads back to a central control hub, installed at the home’s main water supply line, making it easy to shut off water to a specific part of the house.
In addition to its low cost and labor-saving flexibility, PEX is also less susceptible to sediment buildup and corrosion. It can expand and contract without cracking, making it virtually impervious to freeze damage.
Despite its many advantages, PEX does have drawbacks. Extremely hot water will cause the material to degrade over time, as will sunshine or other UV light sources. Even without these factors, it’s unlikely to last as long as well-maintained copper pipes, which are notoriously long-lived.
Strengths and Weaknesses of Copper Pipes
Copper is widely used in both residential and industrial applications and will be for the foreseeable future. It is the most trusted material for supply pipes because of its resiliency and dependability, proven over decades. Copper piping, if installed correctly and maintained well, can last upward of 75 years.
While copper pipes can handle high temperatures with no problem, they may crack if water freezes and expands inside them. Their rigidity also makes them harder to install, as every corner and turn will require cutting the pipe and affixing a joint or other connection. Copper piping is also significantly more expensive than PEX. Combine that with the extra labor it requires to put in, and the price of a repipe project can add up.
Considering the time, effort, and cost of a significant repiping - whether with PEX or copper - it never hurts to seek counsel from local plumbing pros before getting started.
About Lodder Brothers Limited
Lodder Brothers Limited has been providing expert plumbing services in Guelph, Ontario since 1975. They are dedicated to safety, professionalism, and giving back to their community. They offer flat-rate, up-front pricing, 24-hour emergency assistance, and a 100% satisfaction guarantee on every job.
