Underground Water Leak Detection in Fort Worth, TX

A hidden underground water leak — whether in your main water line or yard irrigation system — is typically discovered through its consequences: an unexplained water bill increase, persistent wet spots in the yard, reduced pressure at fixtures, or a water meter that shows continuous flow.

The challenge with underground leaks is that the consequence and the cause are often in different locations. Accurate detection requires equipment and method, not guesswork.

The Water Meter Test

A useful first step you can do yourself: shut off all water in the house (turn off every fixture, appliance, and the ice maker). Go to your water meter and check whether the meter dial or flow indicator is moving. If the meter shows flow with everything shut off, you likely have an underground water leak in your main supply line.

This doesn't locate the leak, but it confirms a leak exists. The next step is professional water leak detection in Fort Worth to isolate which line is affected through pressure testing. If the leak is located beneath the house, our specialized slab leak detection methods take over.

How We Detect Water Leaks

Pressure Isolation Testing

We test each plumbing line in isolation — hot supply, cold supply, and where applicable, drain lines — to determine which is holding pressure and which is dropping. This narrows the search before acoustic or electronic detection begins.

Acoustic Detection

Ground-contact microphones and listening equipment are used along the floor surface and at pipe access points to identify the sound frequency associated with pressurized water escaping through a crack or pinhole. The technician follows the acoustic signal to its strongest point — which corresponds to the leak location.

Electronic Correlating Detection

For longer pipe runs or ambiguous acoustic results, electronic correlators calculate the leak position mathematically by measuring pressure wave timing between two sensors placed at different access points on the same line.

Supply Line vs. Drain Line Leaks

Not all hidden leaks are in supply lines. Drain lines under the slab can also fail — particularly older cast iron drain systems in Fort Worth homes from the 1950s–70s. Drain line leak detection requires a different approach (the line isn't under constant pressure) and may involve camera inspection or a dedicated drain pressure test.

The symptoms of a drain line leak can look different too: wet soil beneath the slab migrating up through cracks, unexplained moisture without a corresponding water bill spike (since drain water has already been used), or persistent soft spots in flooring.

Common Causes of Hidden Water Leaks in Fort Worth Homes

• Aging copper supply lines approaching or past typical service life
• Soil movement from Fort Worth Blackland clay expansion/contraction
• Thermal cycling stress on hot-water supply lines
• Corrosion from water chemistry interacting with copper pipe interiors
• Physical damage from construction work or previous repairs
• Pipe joint failures at fittings buried beneath the slab