Note to readers: This post was updated on July 12, 2026 to reflect current best practices for PEX and copper repiping and add links to our related guides. We refreshed the details below so the advice reflects how we approach this work today.
One of the most common questions we get from San Gabriel Valley homeowners is whether to repipe with PEX or copper. Both are solid choices, but they perform differently depending on your home, your budget, and what you’re trying to solve.
What Is PEX Piping?
PEX (cross-linked polyethylene) is a flexible plastic tubing that has become the standard for new construction and repiping projects. Because it bends around corners without fittings, it installs faster and with fewer joints than rigid pipe — and fewer joints means fewer places where a future leak can start.
Advantages of PEX
- Resists scale buildup and doesn’t corrode the way metal pipe can
- Flexible enough to route around obstacles without extra elbow fittings
- No soldering required, which removes torch and lead-solder risks during installation
- More resistant to freeze damage than copper
- Reduces water hammer noise compared to rigid copper lines
- Generally less expensive than copper, both in material and labor
What About Copper Piping?
Copper piping has been the industry standard for generations, and for good reason.
Advantages of Copper
- Extremely durable with a long service life
- Resists UV exposure, so it can be run outdoors
- Doesn’t release toxic gases if exposed to fire
- Fully recyclable
Where Copper Falls Short
- Can develop pinhole leaks over time, especially in areas with acidic water
- Material costs have risen significantly over the years
- More vulnerable to freeze damage than PEX
- Corrosion can occasionally affect water taste
Which One Should You Choose?
It depends on where the pipe is going and what your priorities are. PEX is often the better choice for complex indoor runs where flexibility saves time and money. Copper still makes sense for exposed outdoor lines or situations where long-term durability against UV and physical damage matters more than upfront cost.
If your home still has original aging copper pipes, it’s worth having them inspected — pinhole leaks and internal corrosion often develop long before you see any visible sign of a problem. Our guide on which option saves more money in California homes goes deeper into cost comparisons for our climate and water conditions.
Get a Professional Opinion
Every home is different, and the right piping choice depends on your specific layout, water quality, and budget. Western Rooter & Plumbing installs and repairs both PEX and copper systems throughout Pasadena, Arcadia, and the San Gabriel Valley. If you’re considering a full or partial repipe, call us at (626) 448-6455 for an assessment and honest recommendation — no pressure, just the facts for your home.
