Why are slab leaks so common here?

Slab-on-grade construction plus hard water corroding the copper. Homes from the 80s–90s with their original copper are the most prone to it.

One pinhole is often the first of several in aging copper. We'll tell you straight when a reroute beats chasing leaks.

How do I know if I have a slab leak?

Watch for a water bill that jumps for no reason, the sound of running water when everything's off, a warm spot on the floor, moisture or a musty smell you can't explain, or pressure that's dropping. Any one of those is worth a leak-detection visit before the damage spreads.

Why are slab leaks so common in Phoenix?

Most homes here are slab-on-grade with copper lines run through the foundation, and our aggressive soil plus 16-20 grain hard water corrodes that copper from both sides. The hot-water lines usually go first, because heat speeds up the corrosion that wears pinholes through the pipe.

How do you find a slab leak without tearing up my floor?

We use electronic acoustic listening gear, pressure isolation testing, and sometimes tracer gas to pin down the leak's exact spot before we touch any concrete. Accurate detection means we open one small, correct spot instead of jackhammering blind.

Should I repair the spot or repipe the whole house?

A spot repair is the cheapest, but it bets the rest of the line is sound. If you've already had one or two slab leaks in aging copper, pinholes tend to keep showing up on the same runs. At that point rerouting that line or repiping the home is the more honest, cost-effective fix for the long haul.

Is a slab leak an emergency?

It's urgent, but it's rarely a midnight crisis unless water is actively flooding the house. Leave it and it wastes water, can undermine the slab, and grows mold, so get it diagnosed promptly. Most of the time you've got room to do the detection right instead of rushing it.

Painted illustration of new red and blue PEX water lines clipped along attic trusses

Plumbing Service

Slab Leak Detection & Repair

Just about every Phoenix-area home is built slab-on-grade, with copper or PEX run through or under the concrete. Hard water corrodes copper from the inside, and a pinhole under the slab can leak for weeks before you catch on. We pinpoint slab leaks with acoustic and pressure equipment, then repair them with the least-destructive method the job allows. We open up only what we have to.

Book online Or call, 24/7(623) 473-0555

Same-day on most calls. Upfront pricing before any work.

What it costs: Detection is flat-rate. The repair is quoted by method once we know where the leak is: a spot repair under the slab, a reroute through the wall, or a partial repipe are very different jobs and we price them separately so you can weigh them. See typical slab leak detection & repair pricing.

Signs you need slab leak detection & repair

A warm spot on the floor (hot-line slab leak)
The sound of running water with everything shut off
An unexplained jump in the water bill
Cracks in flooring or tile, or a damp/heaving area of slab

How we handle it

Pinpoint without demolition
Acoustic listening and line pressure-testing locate the leak to within inches before we open any concrete.
Choose the repair
Spot repair, reroute the line overhead, or repipe, we explain the trade-offs for your home's age and pipe material.
Restore
We coordinate the patch so you're not left with an open slab.

What to know about slab leak detection & repair in Arizona

A slab leak is a leak in a water line running through or under the concrete foundation slab, which is how most metro Phoenix homes are built. Because the pipe is encased in or beneath concrete, you usually can't see the water. You notice the symptoms instead: an unexplained spike in your water bill, the sound of running water when everything's off, a warm or hot spot on the floor (from a hot-water line leak), unexplained moisture or a musty smell, or low water pressure. Catch these early and you've got a clean repair instead of a flooded house.

Arizona's hard water and soil chemistry make slab leaks a regional specialty, not a rarity. Copper lines in the slab, standard in homes of a certain era, corrode from the outside in where aggressive soil contacts them, and from the inside out where 18-grain water and high velocity wear pinholes through the pipe wall, often on the hot side first because heat speeds up corrosion. Once one pinhole shows up, others usually follow on the same run. That's why a single slab-leak repair sometimes points toward a bigger conversation about the whole line.

Finding the leak precisely is the whole game, because the difference between a targeted repair and jackhammering the wrong spot is enormous. We use electronic acoustic listening equipment, pressure isolation testing, and sometimes tracer gas to pin down the leak's location under the slab before anybody touches concrete. Done right, you open one small, correct area. Done by guesswork, you tear up flooring and slab chasing a sound. That's why leak detection skill matters more than muscle on a slab leak.

There are three honest ways to fix a slab leak, and the right one comes down to the pipe's age and shape. A spot repair opens the slab at the leak and fixes that section. It's cheapest, but it bets the rest of the line is sound. A reroute abandons the under-slab section and runs a new line through the walls or attic, so you don't get future slab leaks on that run. A full repipe replaces the home's failing lines and ends the cycle of pinholes for good. If you've already had one or two slab leaks in an aging copper system, repiping is usually the more honest answer than chasing leak after leak.