What causes pinhole leaks in copper pipes?

Pinhole leaks are typically caused by pitting corrosion—resulting from aggressive water chemistry (low pH or hard minerals), excessive water velocity, or galvanic interaction with soil under concrete slabs.

Should I repair or repipe after a copper pinhole leak?

If you experience more than one pinhole leak within a year, the entire pipe wall has degraded. Patching individual sections will only result in new leaks popping up on adjacent weak spots.

Copper Pinhole Leak Repair & Repiping

Repeated leaks behind drywall or under concrete slabs? Stop paying for temporary patches and upgrade to Uponor PEX Type A.

Colorado's water chemistry, high velocity, and municipal treatment additives cause pitting corrosion in copper lines. We convert failing copper systems in 1–2 days with our lifetime workmanship guarantee.

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Why Denver Metro Homeowners Trust Just Plumbing

Master Plumber Led

Every copper replacement is overseen by Bill Clark, Master Plumber (#MP.00600120) with over 30 years of hands-on piping experience.

Non-Invasive Process

We use surgical dry-wall cuts and advanced routing to replace failing copper with zero unnecessary destruction to your home.

Permanent Solution

Unlike metal pipes that react with hard minerals, Uponor PEX-A expansion piping is entirely immune to pitting corrosion and mineral scale.

Why Copper Pipes Develop Pinhole Leaks in Colorado

1. Pitting Corrosion from Water Chemistry

Aggressive mineral content, hard water, and pH variations cause localized galvanic reactions on the interior wall of copper pipes, eating away microscopic pinholes that rupture under normal pressure.

2. Excessive Municipal Water Pressure

Many Front Range municipal supply lines enter homes at over 80–100 PSI. This excessive velocity creates internal turbulence that erodes copper elbows and pipe fittings from the inside out.

3. Under-Slab Chemical Contact

Copper pipes embedded in concrete slabs or gravel beds interact with moisture and chemical salts in the soil, leading to catastrophic slab leaks that can compromise foundations.

High-Pressure & Foothills Areas We Frequently Repipe

We regularly perform whole-home copper-to-PEX conversions across these Front Range communities:

Golden Repiping Castle Rock Repiping Centennial Repiping Denver Repiping Evergreen Repiping Littleton Repiping