Emergency slab leak service in Mesa, AZ, open 24/7

Is this an emergency?

Not every slab leak needs a midnight call. A warm spot that appeared last week can wait for an appointment. These cannot:

• Water is visibly spreading across the floor, or coming up through a crack, tile line or baseboard.
• You can hear water rushing under the floor when every fixture is off.
• The water meter is spinning fast with everything shut off.
• A sudden drop in water pressure throughout the house, especially with damp flooring.
• Water is near outlets, an appliance, the electrical panel or the garage workshop.

If the situation is less clear, call anyway. Explaining it takes two minutes and the person on the line can tell you which side of the line it falls on.

Before you call: five things to do right now

1. Shut off the main water valve.Look at the front of the house near the hose bib, in the garage or utility area, or on the side wall. Turn it clockwise until it stops. If you cannot find it, the city meter box near the street usually has a shutoff, though it may need a special key.
2. Keep away from electricity.Do not wade through standing water near outlets, appliances or the panel. If water is reaching electrical equipment and you can do it safely from dry ground, switch off power at the breaker; otherwise leave it alone and say so when you call.
3. Open a faucet at the lowest point.With the main off, opening a tap relieves pressure and drains the line, which can slow the leak.
4. Move what water can ruin.Rugs, electronics, paper and anything stored on the floor go up on a counter or into another room.
5. Take photos and a short video.Wet floors, damp walls and the meter reading help later with an insurance claim.

If you smell gas or see sparking, leave the building and call 911 from outside. Those are not slab-leak problems; they come first.

What the person answering will ask

A few details speed things up, so keep them in mind while you dial:

• Your address and ZIP code, and a callback number.
• Whether the main valve is off and whether the water stopped.
• Where the water is showing up, and any warm or wet spots you have noticed.
• The age of the home and whether the lines have been repaired before.

You will be told what happens next and when to expect a visit. We do not publish a promised arrival time, because it depends on where the crew is and how the roads look.

What happens when the crew arrives

The first priority is to stop damage, not to start a large project at night. Typically that means confirming the water is off at the right place, checking for electrical and safety risks, and then testing to decide whether the leak is under the slab, in the walls or at a fixture. If the problem is in the slab, the line is isolated so the rest of the house can be restored to service where possible, and the repair is scheduled once the leak has been located. Detection then gives the exact spot, and the options for the permanent fix, whether a direct repair, reroute or repipe, can be discussed when you have had some sleep.

After the emergency

Dry the area quickly. Wet drywall and carpet can develop mold within a couple of days in the right conditions. Call your insurance company soon, since many policies set conditions about prompt reporting and about protecting the property from further damage; our guide to slab leak insurance claims in Arizona lists what to document. For a calmer walk-through of the same situation, read what to do when you find a slab leak.

Keep this page, or the number, where you will find it in a hurry. The SlabGuard Pros front page also carries it in the header on every screen: Mesa's 24/7 slab leak line at (480) 907-0504.

Questions people ask

Last updated October 16, 2026. This page offers general information to help you understand and describe a problem; it is not a diagnosis of your home. Only an on-site inspection can confirm a leak or the right repair.