Does UV Light Damage PEX Piping?

Does UV Light Damage PEX Piping?

PEX tubing is a type of plastic pipe, and like many plastics, it is sensitive to UV radiation. When exposed to sunlight for long periods, the polyethylene in PEX can undergo chemical changes that weaken the pipe. This can lead to:

• Brittleness: UV exposure can make PEX less flexible, increasing the risk of cracks or breaks.
• Discoloration and surface chalking: Prolonged sunlight can fade the color of PEX and leave a chalky surface layer—a visible sign that the material is degrading.
• Reduced lifespan: Continuous UV exposure speeds up aging, making the pipe more likely to leak or fail over time.

It's important to note that PEX installed indoors or in concealed areas, such as behind walls or under floors, is not affected by UV light. Issues usually occur when pipes are temporarily stored outside before installation or installed in areas like attics, crawl spaces, or along exterior walls where sunlight can reach them.

Other plastic pipes, like PVC and CPVC, can also be sensitive to UV exposure, but PEX is particularly vulnerable because of its flexible plastic composition. Metal pipes, such as copper, are largely unaffected by sunlight, with their long-term durability impacted more by corrosion than UV exposure.

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How Do You Protect PEX Piping from Sunlight?

Protecting PEX from UV light is essential to maintaining its durability and preventing leaks. Here are some tips to help safeguard your piping:

1. Use UV-rated pipe sleeves or coverings: For sections that may need to be installed outdoors temporarily or in partially exposed areas, protective sleeves, conduit, or opaque insulation can block harmful UV rays. This is especially important if PEX is stored outside before installation.
2. Limit outdoor exposure: PEX should not be left outside for long periods. If staging outdoors is unavoidable, cover it with UV-resistant tarps and avoid direct sunlight for more than a few days.
3. Monitor and replace exposed piping: Regularly check any potentially exposed PEX for signs of UV damage, such as brittleness, discoloration, or cracks. Damaged pipes should be replaced promptly to prevent leaks and system failures.

Rerouting Piping Through Walls

At Repipe Specialists, we reroute all new piping through walls instead of leaving it exposed along exterior walls. This approach provides multiple benefits for your home's plumbing system, including:

• Protecting PEX from UV damage: Concealing pipes ensures sunlight can no longer degrade the material, keeping your PEX flexible, strong, and leak-free for decades.
• Reducing the risk of slab leaks: Pipes routed through walls are easier to inspect and maintain. Replacing older pipes that may have been buried under concrete also helps prevent costly slab leaks.

  

• Insulating against colder weather: Wall installation naturally shields piping from freezing temperatures. Combined with modern PEX or copper, this helps prevent burst pipes and water damage during colder months.
• Modernizing your plumbing system: Rerouting ensures all piping meets current standards, eliminates outdated or compromised lines, and improves overall water flow and system reliability.

During a full home repipe, we install brand-new Uponor PEX-A tubing fully within walls. For homeowners who prefer a metal solution, we also offer American-made Type L copper piping.

Although most of our repipes use PEX, copper remains a highly durable option. It's naturally resistant to UV exposure if pipes are exposed and performs exceptionally well under high water pressure. If you're unsure whether to repipe with PEX or copper, we've made it easy with our detailed guide.

This approach means your home's plumbing is not only protected from UV damage but also safer, more efficient, and better prepared to withstand environmental challenges for years to come.

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Get a Quote for Rerouting Your Home's Plumbing

For homeowners concerned about UV damage or the natural aging of their plumbing, a full home repipe that reroutes new PEX plumbing is often the most reliable solution. Modern PEX systems, like PEX-A, offer outstanding flexibility, durability, and resistance to common plumbing issues, making them ideal for long-term use in any home. At Repipe Specialists, we've repiped over 75,000 homes using PEX-A tubing. Our proven process ensures a plumbing system that is safe, efficient, and built to last.

• Speed: Our repipe crews typically complete a repipe in a day, returning on another day for wall patching.
• Convenience: Through our One-Stop Repipe™ Process, we handle everything from permits to wall patching to inspections.
• Cleanliness: Our crews are trained to protect your home while working (we cover all surfaces with protective sheeting) and to clean up fully at the end of each day.
• Peace of Mind: Repipe Specialists is a fully licensed plumber in every state we operate in, and we back all of our repipes with a lifetime warranty.
• Financing programs: To help take the sting out of unplanned repipe expenses, we offer several financing programs.
• Price: As a specialist that performs hundreds of repipes a week, we can deliver high-quality repipes at a lower cost versus generalist plumbers. We have an article that covers repipe cost factors in detail. Our quotes typically range from $4,500 to $15,000, depending on your home's size and complexity.

Protect your home's water system today - book a free quote for your PEX repipe and enjoy plumbing that stays durable, leak-free, and worry-free for decades to come.

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