PEX Plumbing
Cross-linked polyethylene tubing used for hot and cold water distribution — flexible, freeze-resistant, and joined with crimp, clamp, or expansion fittings.
Quick answer
PEX Plumbing: Cross-linked polyethylene tubing used for hot and cold water distribution — flexible, freeze-resistant, and joined with crimp, clamp, or expansion fittings. Typical cost: $0.50–$2 per foot of pipe; $4,000–$10,000 for a typical whole-home repipe..
Why it matters
PEX is now the default for repipes and new construction. It costs 50–60% less than copper, installs faster, and is more freeze-tolerant — but rodents can damage it in attics and crawlspaces.
Typical cost
$0.50–$2 per foot of pipe; $4,000–$10,000 for a typical whole-home repipe.
Pros
- • Half the cost of copper
- • Freeze-tolerant (expands without bursting)
- • Fast installation with fewer joints
- • Color-coded hot/cold
Cons
- • Not UV-stable — must be hidden from sunlight
- • Rodents can chew through it
- • Not for outdoor or exposed runs
Common uses
- • Whole-home repipes
- • Bathroom and kitchen remodels
- • Radiant floor heating
Alternatives
CopperCPVCGalvanized (legacy, do not install new)
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Frequently asked questions
- How long does PEX last?
- Manufacturers warranty 25 years; installations from the 1990s are still in service. Expect 40–50 years if not exposed to sunlight or rodents.
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