PEX vs Copper Repipe in Lake Stevens, WA

Last updated: October 2026

Many Lake Stevens homes — the typical vintage here is around 1993 — still run on aging galvanized or early copper supply lines. When the water pressure drops, the water turns rusty, or pinhole leaks keep appearing, a whole-house repipe is the fix. Eby Plumbing installs both PEX and copper repipes across Lake Stevens, and here is how the two materials compare without the sales pitch.

What is PEX, and why is it so common now?

PEX (cross-linked polyethylene) is flexible plastic tubing that snakes through walls with far fewer fittings than rigid pipe. A repipe often uses a central manifold — one hub where every fixture gets its own dedicated line, like a breaker panel for water. That means you can shut off one bathroom without killing water to the whole house, and there are almost no hidden joints inside walls to fail later.

The flexibility is also why PEX installs faster: fewer cuts, fewer solder joints, less drywall opened. On a typical repipe that speed shows up directly in the price.

What are the honest tradeoffs of copper?

Copper has been the standard for generations. It is rigid, so every turn needs a fitting, which means more joints and more labor — the main reason copper repipes cost roughly double. In return you get a material with a proven 50-plus-year lifespan, natural resistance to UV (it can run exposed where PEX cannot), and easy future repairs with standard fittings any plumber stocks.

One Lake Stevens-specific note: aggressive or acidic water can cause pinhole leaks in copper, but Snohomish County PUD water is soft at about 73 ppm hardness — gentle on copper. In our service area, water chemistry is not a strong argument against copper the way it can be in hard-water regions.

PEX vs copper: head-to-head comparison

Every repipe is scoped on site — home size, stories, and access set the plan — and confirmed with a written quote before work begins.

Which should you choose?

• Choose PEX if budget matters, you want the job done fast with minimal drywall damage, your crawl space or attic runs through cold zones, or you like the idea of a manifold with individual fixture shutoffs.
• Choose copper if you are planning to stay in the home for decades, you want the longest proven track record, sections of pipe will run exposed (garage, unfinished basement), or a future buyer may value copper.
• Choose either over limping along with galvanized steel, which rusts from the inside out and only gets worse.

Either way, a repipe is permitted work — see our plumbing permits guide — and the right answer for your house depends on its layout. Our repiping services page covers the process.