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Water Leak Detection and Repair

A leak you can't find still costs you water every hour it runs. Call 972-406-8076 and we'll track it down, show you where it is and give you the price to fix it before we start.

A Koen plumber kneeling beside an opening cut through a floor slab to reach a leaking pipe

Signs of a Hidden Leak

Most leaks hide behind a wall, under a floor or under the slab. These are the clues customers usually call us about:

  • The water bill jumps and nobody's using more water.
  • A yellow or brown stain spreads on a ceiling or wall, or the paint starts to bubble.
  • You hear water running when every tap in the house is off.
  • A patch of floor feels warm, damp or soft.
  • A musty smell won't go away and you can't see where it's coming from.
  • The water meter keeps moving with everything turned off.

To check the meter, turn off every faucet, appliance and sprinkler, then watch the dial for a few minutes. If it moves, water is going somewhere.

Slab Leaks in North Texas Homes

Many North Texas homes are built on a concrete slab, with the water lines running underneath it. North Texas clay swells when it's wet and shrinks when it dries out, and that movement puts stress on the slab and the pipes under it. A slab leak often shows up as a warm spot on the floor, a sound of running water or a bill that keeps climbing. We find where the leak is before anyone opens a floor, so the repair is as small as it can be.

Finding the Leak Before Opening a Wall

We locate the leak first, then talk to you about the repair. Your plumber will show you where the water is coming from, explain the options for fixing it and give you the price before any work begins.

Leaks You Can See

Not every leak is hidden. We also fix the ones dripping in plain sight: a supply line under a sink, a leaking shutoff valve, an outdoor faucet that split in a freeze, a pipe that let go in the attic.

What Our Customers Say

Word for word, from our Google reviews.

Read all 86 reviews on Google

"Koen has been our go-to team for plumbing work. They saved the day with a hot water pipe leak, they have fixed out hot water heater, and replaced cartridges in our shower faucets. The show up with smart solutions and lead with integrity in everything they do. We got their name from neighbors who have had similar experiences with they team. We highly reccomend Koen!"

Lauren F., Google, May 2026
  • "Koen Plumbing came out quickly on an icy day for an urgent plumbing issue. They were able to put a temporary resolution in place while waiting for warmer weather to do further troubleshooting, and provided estimates for both best and worse case scenarios, so I had an idea of what to expect. Then they came back as soon as the weather improved enough to do the work. Would definitely recommend!"

    Deirdre G., Google, about February 2026

Frequently Asked Questions

How do I know if I have a slab leak?

Common signs are a warm or damp spot on the floor, the sound of running water with everything off, a water meter that keeps moving and a water bill that rises with no change in use. Call us if you notice any of them.

What should I do if water is coming through the ceiling?

Shut off the main water valve to the house, and turn off the electricity to the wet area if you can reach the breaker safely. Then call us right away at 972-406-8076.

Is leak detection free?

A diagnostic fee only applies when finding the problem takes extensive investigation, such as running a camera through your pipes or inspecting underneath the house. The fee varies with the job, and your plumber will always give you the price before starting that work. There's no trip charge for us to come out.

Can you fix a slab leak without breaking up the floor?

That depends on where the leak is and the shape the pipe is in. Sometimes the best repair goes through the slab, and sometimes rerouting the line is better. We'll explain the options and give you the price for each before we start.

Do you fix outdoor and yard leaks?

Yes. A soggy or unusually green patch in the yard can mean a buried line is leaking, and we can find and repair it.

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Tell us what's going on and someone from our office will call you back during business hours.

Water coming through the ceiling or a smell of gas? Don't wait for a call back. Call us now.

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  • Monday to Friday8:00 a.m. to 5:00 p.m.
  • Saturday8:00 a.m. to 2:00 p.m.

You can call any time, day or night. A person answers after hours and books your visit for the next working day.

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