Should I Replace My Copper Pipes with PEX?

PEX piping was used to install a tankless water heater in this home. (Photo courtesy of Angie's List member Chris R., Mystic, Conn.)

PEX piping was used to install a tankless water heater in this home. (Photo courtesy of Angie's List member Chris R., Mystic, Conn.)

Dear Angie: I am about to re-plumb my 23-year-old home, which has pin leaks in the copper piping. The installer is recommending replacing my copper pipes with PEX. What are the pluses and minuses of PEX? I intend to sell the house in a few years, so I am concerned about it hurting resale value. – Mark H., Mission Viejo, Calif.

Dear Mark: If you haven’t yet, it could be worth it to first check with a qualified plumber to see if the pin holes in your existing pipes can be repaired. If so, you could get another 23 years out of your copper pipes and spare the cost to replace plumbing.

If it’s a small area that’s leaking, you could just replace that section with either PEX or copper. Both types are interchangeable.

RELATED: Should I Install PEX or Copper Piping?

If you do need to replace your existing pipes, PEX — or, cross-linked polyethylene flexible tubing — is certainly one of the more popular options, and for a number of reasons. To start, PEX is easy to install because it’s flexible. Your plumber can install it much faster than he or she could install rigid copper pipes. Second, PEX costs less than copper. Coupled with the quicker installation, the savings over installing copper pipes can be significant. Also, PEX pipes don’t corrode like copper and aren’t susceptible to freezing.

Types of Plumbing Pipes

In this video, experts explain the different plumbing options for your home.

If there’s a drawback to PEX, it’s that it doesn’t have the proven history that copper has exhibited. Copper pipes have been around for centuries. In residential settings, it’s not uncommon for them to last 50 years or more. PEX, by contrast, has only been used in U.S. residential plumbing for the past 30 years or so; and it was only approved a few years ago for use in California.

Because of that, some homeowners might still prefer copper.  PEX can also be susceptible to damage from ultraviolet rays from the sun. If it has to be installed outside the home, be sure to talk to your plumber about how he or she plans to protect it.

If you’re concerned about how it will impact the resale value of your home, talk to your real estate agent about your plans to change out your pipes. Ask her or his advice on what other homes in the area have and if prospective buyers have shown a preference for one pipe type over the other. Chances are, your buyer isn’t going to be too concerned with the type of piping you have.

RELATED: Does PEX Piping Affect Drinking Water Quality?

Whatever you decide, be sure your plumber is licensed to do the work and check with your local building authority to see if he or she will need to pull permits to do the job. Be sure to ask how long the warranty is and if your plumber is certified to work with that product. Plumbers working with PEX should be certified by the product manufacturer. Should the product not be installed in accordance with the manufacturer's installation instructions, they could void the warranty.

Angie’s List collects about 65,000 consumer reviews each month covering more than 720 home and health services. Angie Hicks compiles the best advice from the most highly rated service pros on Angie’s List to answer your questions. Ask Angie your question at

Editor's note: This is an updated version on an article originally posted on July 1, 2013.

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Should I Install PEX or Copper Piping?


pex piping
A PEX manifold works like a circuit breaker panel, allowing a homeowner to shut off certain stretches of plumbing, usually to a bathroom or kitchen. (Photo courtesy of Angie's List member Jeffrey T. of Fishers, Ind.)

When it comes to PEX plumbing vs. copper pipes, each has advantages and detractors. Copper is solid and time-tested, but PEX is becoming more popular in homes.


A few years back I got a call on Thanksgiving morning for an emergency plumbing job at a low income apartment complex. Six different apartments had water flooding them from pipes in the ceiling. The contractor who built the buildings used unskilled laborers to install PEX with Sharkbite fittings. If you could do it wrong.....they did. They often times ran the plumbing on the OUTSIDE of the insulation, did not use elbows but instead just ran the PEX in a big arc in the attic, the heat for the apartments came from their individual hot water heaters that couldn't handle the the constant use in our sub zero winter climate, little to now insulation was used in the outdoor water closet, and the hot water heaters were installed so that the intake/exhaust were facing west, the direction the wind comes from more often than not (meaning, on high wind days the exhaust was forced into the intake, choking out the flame). Anyway, to get back to the point of this article, the PEX lines froze and broke just as readily as copper. It wasn't that cold that Thanksgiving but the combination of high winds choking out their hot water heaters, no insulation and multiple other factors caused dozens of PEX failures. And I found numerous sharkbite fitting that had failed, not just due to the freezing but simply because the plastic parts inside failed under pressure. While PEX and Sharkbites are good in a pinch (an emergency fix), I would avoid using them to plumb your entire home, especially if you do not know what you are doing.

If there are pin holes in the piping it indicates there has been substantial corrosion of the copper pipes, and it may be close to catastrophic failure. it is unlikely that this is limited to a few locations, but is systemic. This is a known drawback to copper pipes, if the water is acidic it can corrode the pipes, invisible from the outside they become fragile thin walls ready to burst. If the original plumber suggested replacing, then replacing is probably the right thing to do and don't take the advice of someone who has never inspected the pipes over a professional who has seen them firsthand.

The only problem I have had with the PEX is we had a rat chew through one of the lines under our house when I was at work. Flooded the entire crawl space. Other than that, easy to install. Awesome product. Got to love mother nature.

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