Phoenix Valley · under the floor
What is a slab leak
A slab leak is a break or pinhole in a pressurized water line that runs in or under the concrete slab. The water goes into the soil or the slab instead of a fixture. Most Phoenix-area houses sit on slab-on-grade, so the leak can hide under tile, carpet, or stone for a long time. This page defines the problem. It does not mark the floor.
What is leaking — and what is not
The usual slab leak is a domestic hot or cold supply line. It is not a sewer line, not pool plumbing, and not a roof leak that stained a ceiling. A toilet wax ring or a shower pan can mimic a wet floor without being under the slab.
If the pool is dropping and the house fixtures are fine, that is a different trade. If the meter still moves with every tap off, stay on the house side.
How it shows up in Valley houses
A warm path in a hallway is the classic hot-water slab leak clue. A musty closet, a soft tack strip, or a bill that jumped without extra guests are the quieter ones. Hard water and decades of copper under ranch slabs are why older Mesa, Tempe, and central Phoenix houses show up in this search.
Newer homes with PEX home-runs to a garage manifold can still leak — often at a fitting you can reach without opening the great room. Write what you already know about the pipe.
Why tile and stone hide it
Large-format tile and stone spread heat. A leak that would have been one hot tile in a 1980s ranch can feel like a warm hall in a later Scottsdale or Gilbert house. Listening gear and a thermal camera are common on those floors. A hammer is not the first move.
Do not start cutting a hole because a phone app showed a warm blob. That is a clue for a locator, not a mark.
What this page will not claim
No shop address, no license number, and no promise that a warm floor is always a slab leak. Sunshine on a dark slab and a heater closet fool a hand test. A licensed local leak firm may contact you if they accept a request. You can decline or get a second mark before anyone opens concrete.
Related service requests
These are narrower request pages on this site, not a list of partner shops. A licensed local provider may contact you if they accept a lead.
Local statistics
Phoenix slab leak statistics, 2026 — public-record figures, not a bid from Phoenix Slab Leak Detection.
Questions
Is a slab leak the same as a foundation leak?
People mix the words. Here it means pressurized supply water in or under the slab, not a crack letting in irrigation or rain. Describe the symptom — warm floor, spinning meter, stain — instead of the label.
Can a slab leak happen in a newer Phoenix house?
Yes. Fittings fail, and some newer houses still have lines in the slab. Others already have PEX in walls or a garage manifold. Age changes the first test, not whether a locate is worth requesting.
Is a wet yard a slab leak?
Not by itself. Irrigation and a pool line wet yards. House-side clues are a moving domestic meter, a warm floor, or the sound of water with fixtures off.
Do you repair it on this page?
No. This site forwards a diagnostic request. Some leak companies locate only. Some also repair or reroute. Ask the person who calls.
Related pages
These are more request pages on this site, not a list of partner shops. A licensed local provider may contact you if they accept a lead.
Request slab leak detection in Phoenix Valley
Call if you want to talk now, or send the form. Either way this is a request, not a booked job.
Call (833) 819-0476