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Slab Leak Causes & Prevention

Slab leaks aren't bad luck — they have causes, and causes can be addressed. Copper pitting from aggressive water chemistry, expansive clay heaving the slab, abrasion where pipes rub concrete, and installation shortcuts from the building boom all play a role. Understand why your leak happened and you'll know whether you're fixing one leak or preventing the next five.

Why This Matters

The cause determines the cure. A single abrasion leak needs a spot fix; system-wide pitting needs a repipe. And if your water chemistry is eating copper, no repair lasts until that's addressed — a water treatment fix that costs hundreds can save thousands.

In-Depth Guides

What Causes Slab Leaks? 7 Reasons Pipes Fail Under Concrete

What causes slab leaks? Corrosion, shifting soil, abrasion, high pressure & more. The 7 real reasons pipes fail under concrete — and how to …

Copper Pinhole Leaks Under Slabs: Repair or Repipe?

Copper pinhole leaks under your slab: what causes pitting corrosion, repair vs repipe costs, and how to decide. Real numbers for failing cop…

Slab Leak in New Construction: Is the Builder Responsible?

Slab leak in a new-construction home? Learn why it happens, what the 1-2-10 builder warranty covers, and how to make the builder pay for rep…

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Quick Answers

What is the most common cause of slab leaks?

Corrosion — especially pinhole pitting of copper from aggressive water chemistry — followed by soil movement stressing the pipe.

Do new homes get slab leaks?

Yes. Installation defects (kinked lines, pipes rubbing rebar, poor soldering) cause a surprising share of leaks in homes under 10 years old.

Can I prevent slab leaks?

You can't make pipe immortal, but you can: keep water pressure at 40–80 psi, address aggressive water chemistry, and fix the first pinhole before it becomes the fifth.

Dealing With a Slab Leak? Talk to a Pro.

Every day a slab leak runs, it wastes hundreds of gallons and risks foundation damage and mold. Get a pinpoint diagnosis today.

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