PEX vs. Copper: What Are They Actually Putting Inside Your Walls During a Repipe?

In this brief article brought to you by Mr. Rooter Plumbing, we give you a breakdown of the most common options and what each one brings to the job. If you’d rather consult a trained plumber in Sarasota, FL, then contact Mr. Rooter to get in touch.

Copper, the Classic Standard

Copper has been the go-to pipe material for residential plumbing for most of the last century, and for good reason. It's durable, resistant to bacteria, handles both hot and cold water without issue, and has a proven track record that spans decades of real-world use.

The downside is cost. Copper is the most expensive common pipe material on the market today, and that price gap has widened considerably over the years. It also requires skilled installation.

Moreover, in areas with highly acidic water, copper can corrode faster than expected, which shortens its lifespan considerably.

For homeowners who want a time-tested material and don't mind the investment, copper remains an excellent choice. For those working within a tighter budget, other options deserve a serious look.

PEX, the Modern Marvel

Cross-linked polyethylene, or PEX, has become the most widely used pipe material in residential repiping over the past two decades, and the reasons aren't hard to understand.

PEX is flexible, which means it bends around corners and through tight spaces without requiring as many fittings and joints as rigid pipe. Fewer joints means fewer potential leak points.

Plus, PEX costs significantly less than copper, installs faster, and handles freeze-thaw cycles better than rigid materials. It works well for both hot and cold water lines, resists scale buildup, and doesn't corrode.

The flexibility that makes PEX easy to install also limits it in certain applications. For instance, PEX cannot be used outdoors or in areas exposed to direct sunlight. It also can't connect directly to a water heater.

For most residential repiping projects, a knowledgeable plumber typically reaches for PEX as the default.

CPVC, the Middle Ground

Chlorinated polyvinyl chloride, or CPVC, sits somewhere between copper and PEX in terms of rigidity, cost, and application.

Unlike standard PVC, CPVC handles hot water safely. And CPVC costs less than copper and more than PEX.

In comparison to copper, it's rigid like copper, meaning it requires fittings through complex runs but holds its shape well in straight runs through walls and ceilings. It doesn't corrode, doesn't conduct heat as readily as copper, and has a solid performance history in residential applications.

Some plumbing repair service professionals favor CPVC in specific situations, like in regions where water chemistry would accelerate copper corrosion or where a rigid pipe is preferred but the copper budget isn't available.

What the Right Choice Depends On

No single pipe material is the right answer for every repiping project. The best choice depends on the local water chemistry, the age and layout of the existing system, the property's specific demands, and the homeowner's priorities around budget, longevity, and water quality.

Your plumber at Mr. Rooter evaluates all of the factors before recommending anything. A plumber who pushes one material for every job regardless of circumstances isn't giving a property the individual attention it deserves.

Get in Touch

Whether you’re considering a complete repiping or need urgent plumbing repair service, the pros at Mr. Rooter are here to help.

Call or message Mr. Rooter to get in touch with a live representative today. We’re happy to arrange a consultation, schedule an appointment, or have a plumber dispatched to your location as soon as possible.