The water service line is the pipe that carries water from the city meter at the street to your home. It is buried, pressurized, and completely out of sight, which means a leak there can run for months while the only evidence is a rising bill or a patch of grass that grows a little too well.
Flower Mound's larger residential lots make this problem trickier than in dense suburbs. A service line here can run a long distance from the meter to the house, and the leak could be anywhere along that run. Digging up the whole path to find it is expensive and destructive. Our detection work exists so you only dig once, in exactly the right place.
What Are the Signs of a Water Line Leak in the Yard?
Look for these, especially in combination:
- Soggy or sunken spots in the yard. A leak saturates the soil from below. Grass over the break grows faster and greener, or the ground feels soft and spongy underfoot even in dry weather.
- A water meter that spins with everything off. Shut off every fixture and the main valve inside the house. If the meter at the street still moves, water is escaping between the meter and your shutoff, which means the service line.
- Puddles or runoff when it has not rained. Water surfacing far from any sprinkler head, or a constant trickle in the gutter on a dry day, is worth checking.
- Low water pressure inside the house. A break in the service line bleeds pressure before water ever reaches your fixtures.
- A sudden, unexplained spike in the water bill. Our guide on high water bills explains how to separate a leak from seasonal irrigation use.
One caution: irrigation systems cause many of the same symptoms. A stuck sprinkler valve or a broken lateral line can mimic a service line leak. Part of our visit is ruling the irrigation system in or out before we commit to a diagnosis.
How Do You Pinpoint a Leak on a Long Underground Run?
We work the problem from both ends.
First, we confirm the leak is on your side. The meter test tells us whether water is escaping between the street meter and your house shutoff. If the meter holds steady with the house valve closed, the problem is inside the house, not in the yard line, and we redirect the search.
Second, we trace the line's path. Using locating equipment, we follow the service line from the meter to the house and map its route above ground. On big lots this step matters because the pipe rarely runs in a straight line.
Third, we listen along the run. Acoustic sensors placed on the ground pick up the sound of water escaping the pressurized pipe. The technician sweeps the traced route and narrows the search to the loudest point. Soil moisture readings back up the finding.
Finally, we mark the spot. The leak location gets marked in your yard with paint or flags, photographed, and written into your report with measurements from fixed landmarks like the meter box and the house corner. Your plumber or excavator starts digging at the mark, not at a guess.
Why Do Service Lines Fail in Flower Mound?
A few local factors work against buried water lines here:
- Expansive clay soil. The same soil that stresses slab foundations also moves around buried lines. Wet-dry cycling shifts the pipe and strains joints and fittings.
- Age and material. Older neighborhoods may still have original service lines in materials that corrode or crack over decades. A line installed when the home was built has been under pressure every minute since.
- Tree roots. Mature trees common on Flower Mound's larger lots send roots toward the moisture around a buried line. Roots exploit small weaknesses and widen them.
- Hard freezes. North Texas does get hard freezes, and the February 2021 freeze proved that shallow or poorly insulated sections of pipe can burst. Our freeze protection guide covers what homeowners can do before the next one.
What Happens After We Find the Break?
You get the same deliverables as every visit: a marked location in the yard, written findings with photos, and an upfront quote for any repair work. For a service line, the report includes the line's mapped route and depth measurements, which matter when a plumber plans the excavation or a trenchless replacement. You can also take the report to your city water provider if there is any question about whether the break sits on your side of the meter.
If the symptoms pointed to a slab leak instead, our slab leak detection service covers that. And if the wet ground is near your sewer cleanout rather than the water line route, sewer line leak locating is the right next step.