Confirming it is the slab
Isolating the supply system and pressure testing the hot and cold sides separately. Plenty of suspected slab leaks turn out to be a drain, an irrigation line, a shower pan or the water heater.
Slab Leak Repair in Tempe
A supply line that fails under a concrete floor does its damage quietly for weeks. Tempe Emergency Plumber confirms it is really the slab, pinpoints the spot and explains every repair option before a single hole goes into your floor.
- 24/7 Emergency Service
- Upfront Quotes
- Same-Day Availability
Warning Signs of a Slab Leak
- A warm patch of tile with nothing above or below to explain it
- Running water you can hear at night with every faucet closed
- Water seeping up through a floor joint or at the edge of the slab
- Pressure that has dropped across the whole house
- Baseboard, carpet or wood flooring staying damp in one area
A warm spot usually means the hot side has failed, and hot lines fail first because heat accelerates corrosion. A cold-side leak is quieter and tends to show as a pressure drop and a rising bill instead. Mark where the warm or damp area is before you call. It narrows the search immediately and keeps the opening smaller.
What the Service Includes
Slab work is where guessing gets expensive, so the time goes into placing the leak accurately before anyone decides on a method.
Pinpointing the location
Acoustic listening and line tracing narrow the leak to a small area of floor, so the access opening is as small as the job allows.
Spot repair, reroute or repipe
Opening the slab at one point, rerouting that run overhead through walls and attic, or replacing the failed line entirely. Each has a different cost and a different level of disruption.
Testing and closing up
The repaired line is pressure tested before the opening is closed, and you are shown the failed section of pipe so you can see what actually went wrong.
Why Slab Leaks Happen Here
Almost every house in Tempe sits directly on a concrete slab, and in homes built before the 1990s the supply lines were run in or under that concrete in copper. Two things work on that copper. The first is the water: minerals and treated municipal supply slowly thin the pipe from the inside, and pinholes open on the hot side first. The second is contact. Where a line was laid against rebar or rough concrete, or bent tight around a corner, it rubs and wears every time the pipe expands and contracts with hot water.
That is why repeat leaks matter more than the first one. A pinhole in a run of fifty-year-old copper is usually followed by another a few feet away within a year or two, because the whole run has the same history. When that pattern appears, rerouting the line out of the slab and overhead often costs less across a few years than repairing it in place twice more. Homes plumbed with polybutylene have a related but different problem, and the plumber will tell you which material you actually have.
Not certain it is the slab? Start with leak detection, or read the slab leak warning signs guide. If a line has already opened up and water is spreading, go to burst pipe repair. Drain lines under the same slab are covered on our sewer line repair page, and the same repair-or-replace reasoning appears on our comparison page. You can also request service.
Slab Leak Questions
How much does slab leak repair cost in Tempe?
It comes down to the method. Locating the leak, opening a small section of slab, rerouting the run overhead and repiping a whole line are four different scopes of work. Tempe Emergency Plumber finds the leak first and then prices the realistic options side by side, so you are weighing disruption against long-term value rather than guessing.
Do I have to break up my floor?
Not always. Rerouting the affected line through walls and the attic avoids opening the slab at all, and in an older house where the pipe has already failed once it is often the better answer. Where a spot repair makes more sense, the opening is kept as small as access allows and the floor is closed back up.
Is a slab leak an emergency?
Treat it as urgent rather than an emergency, unless water is coming up through the floor. A leak under concrete soaks flooring and framing and undermines the soil supporting the slab, so the sooner it is located the less repair follows. Call Tempe Emergency Plumber the same day you notice the signs.
Can a slab leak crack my floor or walls?
It can contribute. Water saturating the soil under one part of a slab makes that area behave differently from the dry soil around it, and uneven support is what moves a floor. If you see new cracking along with the plumbing signs, mention it when you call so both get looked at. See where we work for local service details.
Get the leak located under your slab
Tell us what you are feeling underfoot and we will plan the right inspection.