Slab Leak Detection & Repair

For the very best in slab leak detection and repair, DFW  homeowners trust Legacy Plumbing. With an award-winning team of experienced plumbers, you can be sure we will be able to quickly and efficiently locate and repair any slab leak regardless of size or difficulty.

We only hire the most knowledgeable, skilled technicians. We will arrive on time. You will always know the price before any work begins and we will leave the slab cleaner than we found it.

Call us now for more information and to get on the schedule, or keep reading to learn more about how we approach sewer and water line slab leak repair.

Water Slab Leak Repair

The vast majority of homes north of Dallas that were built between the 1960s and 2010s have copper water lines under the slab foundations. Copper makes an excellent water line, but over time pin-hole leaks have the tendency to develop. This can be caused by improper installation, the water line touching concrete or a piece of ferrous metal, or turbulence in the water line.

1. Symptoms

Signs of a water line slab leak may include:

  • A hot or warm spot on the floor
  • Wet spots on the floor 
  • Cracks in the flooring
  • Sounds of running water 
  • Abnormally low water pressure
  • A sudden increase in your water bill
3. Detecting

In order for the test to be successfully performed, there must not be any leaky faucets or toilets and the house line must be successfully isolated from the yard line. After a leak has been confirmed, Legacy Plumbing uses top-of-the-line water leak detection equipment, such as acoustic listening devices and electronic line locators to locate the leak and determine the severity of any damage.

2. Testing

For water leaks, Legacy Plumbing typically starts by confirming a leak by pressure testing the lines. A pressure gauge is typically connected to a faucet and the water is turned off at the meter or at the shut off valve in the yard. The pressure on the gauge is monitored to determine if there is a loss of pressure.

4. Repair

Water line slab leak repairs can be made through small slab penetrations or by tunneling under the perimeter. In some cases, re-routing waterlines is a more economical solution, especially when the overall pipe system is corroded. When applicable, re-routing waterlines can also be used to prevent damage to expensive flooring. Read our blog article on the Four Ways to Fix a Slab Leak for more information.

Sewer Line Slab Leak

Unfortunately, the soil in the Dallas Metro is notorious for causing slab foundations to shift over time. This ends up causing many of the sewer slab leaks in our area. Older homes may still have cast iron sewer lines, while newer homes utilize PVC piping under the slab. Cast iron can become corroded over time, while PVC piping is more likely to break. Sewer-line slab leaks can happen to older homes and newer homes. Detecting a slab leak is the first critical step, once confirmed a repair is necessary to prevent further damage.


For sewer and drain leaks, Legacy Plumbing uses isolation test balloons and sewer line camera equipment to locate the area(s) of the leak. A test ball is placed in the main sewer line at an exterior cleanout. The lines are then filled with water and monitored at the floor level to determine if the water drops. If the water does drop, a leak is confirmed. Isolation testing and running a camera in the line are the next steps to determine the exact location of the leak(s).


After our findings, we will consult with the homeowner on the best course of action to get the leak repaired. There are many factors to evaluate and determine the best way to repair a slab leak or replace a water or sewer line. The overall plumbing layout, house layout, slope, length, and depth of the lines can all determine the best outcome. Legacy Plumbing has extensive experience in both water line and sewer line slab leaks. We will walk you through the best solution before incurring any additional costs.

If you suspect you have a slab leak, you can trust Legacy Plumbing to get it resolved accurately, completely, and efficiently.

Know this: Legacy Plumbing provides the top slab leak repair and slab leak detection services guaranteed to resolve your plumbing problems and help reduce your water bill. Homeowners in Frisco, Plano, McKinney and throughout North Dallas have made Legacy Plumbing their first choice for major to minor repairs.

Give us a call today for top-rated slab leak repair and more!

Legacy Plumbing is centrally located to provide fast service to North Dallas and surrounding suburbs. If you are looking for a North Dallas area plumber please call us today or complete our Online Request Form.

Our Work is Our Word.

Quote Mark
Quote mark
Reviews of Slab Leak Services