Repipe & Leaks

Slab Leak Detection and Repair in Las Vegas

A slab leak in Las Vegas usually shows up as a warm spot on the tile, an unexplained jump in the Las Vegas Valley Water District bill, or the sound of running water with every fixture shut off. Type M copper installed under the slab in 1980s and 1990s tract homes is the common failure mode, plus rare ABS hot-water lines that were never spec'd for hot service. A C-1 plumber locates with an electronic leak detector (LeakTrac, Fisher XLT-30) and an acoustic ground microphone, then quotes spot repair through the slab or an overhead PEX reroute. CheckedHomePros matches you with crews who pinpoint before they cut and pull the city or Clark County permit.

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Slab Leak Detection & Repair in Las Vegas Metro

What slab leak detection & repair actually involves

Pressure-isolation test on hot and cold lines to confirm the leak is below the slab.

Electronic line tracing with LeakTrac 2400 or Fisher XLT-30 to locate the energized leak signature.

Acoustic ground microphone confirmation to pinpoint within 6 to 12 inches before cutting.

Spot repair: jackhammer through tile or concrete, repair the section with type L copper or PEX, patch and tile.

Overhead reroute: abandon the leaking under-slab line and run new PEX through the attic to the affected fixture or branch.

Las Vegas-specific things to know

Type M copper hot-line failures under slabs in 1985 to 2005 Green Valley and Henderson 89052 homes.
Recirculation loop pinholes in custom Summerlin 89135 homes where the loop ran the pump 24/7 without a timer.
ABS hot-line failures in early-1980s tract homes near east Sahara 89104 where the material was misapplied.
Pinhole clusters at copper elbows under slabs on Spring Valley 89117 tract homes from velocity-induced erosion.
Sleeve corrosion where copper passed through concrete without a proper PVC sleeve in 1990s North Las Vegas builds.

Typical slab leak detection & repair pricing in Las Vegas

$1,850–$7,500

Slab leak detection alone in Las Vegas runs $325 to $550. Spot repair through the slab typically lands $1,850 to $3,400. Overhead PEX reroutes of a single line run $2,800 to $4,500. Multi-line reroutes or full hot-side reroute can reach $7,500.

What to ask each pro you compare

✓How will you pinpoint the leak before cutting the slab?
✓Spot repair versus overhead reroute, what is the cost and warranty difference?
✓Will you tile-match the patch, or is that a separate trade?
✓Is the permit and inspection included?
✓What is the labor warranty on the repair or reroute?
✓Do you carry an active Nevada C-1 license and $1M liability?

Our vetting standard for slab leak detection & repair pros

✓Active Nevada State Contractors Board C-1 license, verified on nvcontractorsboard.com.
✓Electronic leak detection equipment on the truck (LeakTrac, Fisher, or equivalent hardware-grade tools).
✓Documented success rate on slab leaks (ask for references in your ZIP).
✓Written pinpoint commitment before cutting, with a callback policy if the location is wrong.
✓Permit pulled with the city of Las Vegas, Clark County, Henderson, or North Las Vegas.
✓$1M general liability and Nevada workers comp on file.

Slab Leak Detection & Repair: common questions

How do I know I have a slab leak?

Warm spots on the floor, unusually high water bills, sound of running water with all fixtures off, or mildew at the base of a wall on a slab home. Confirm with a pressure test: if the cold pressure holds but hot drops, the leak is on the hot side under the slab.

Spot repair or reroute?

If it is a single pinhole and the rest of the under-slab copper tests sound, spot repair is fine. If the home has had multiple pinholes in 2 to 3 years, reroute the entire hot side overhead with PEX. Spot-repairing serial pinholes spends money repeatedly.

Will my insurance cover the slab leak?

Most Nevada homeowners policies pay for water damage and access (cutting and patching the slab), but exclude the pipe repair itself. File a claim early and document the leak with the plumber's detection report.

How do you find a slab leak?

Plumbers pressurize the suspected line, then trace with an electronic detector that picks up the electrical signature of escaping water. An acoustic ground microphone confirms the spot within inches before cutting. Modern equipment hits within a 12 inch radius on most jobs.

Can I avoid cutting tile?

An overhead reroute avoids the slab entirely. It costs more in the short term but never touches your tile, grout, or flooring. For homes with travertine, marble, or high-end porcelain, reroutes often pay for themselves on tile-match savings alone.

Why do under-slab copper lines fail?

Three causes: high velocity at undersized lines that eroded the copper from the inside, aggressive water chemistry, and direct contact with rebar or wet concrete that set up a galvanic cell. Las Vegas water at 16 to 18 grains hardness accelerates all three.

Related Plumbing services

Leak Detection & RepairElectronic, acoustic, and thermal imaging leak detection for slab, wall, ceiling, irrigation, and pool fill-line leaks across Clark County.Whole-Home Repipe (PEX or Copper)PEX-A or type L copper repipe for homes with polybutylene, pinhole-leaking copper, or galvanized supply lines.24/7 Emergency PlumberSame-day and overnight response for burst pipes, sewage backups, no-hot-water failures, gas odors, and pool fill-line ruptures.

Slab Leak Detection & Repair. Reading from our Las Vegas Plumbing blog

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Slab Leak Signs in Henderson and Summerlin Foundations

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