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Leak Detection
Most Central Texas homes sit on a concrete slab, and the water lines run underneath it. The clay soil under that slab swells when it rains and shrinks through a dry August, and every cycle flexes the pipe a little. Eventually a copper line rubs through or a joint gives, and the leak runs into the ground where you cannot see it. The first sign is usually a water bill that makes no sense, a warm patch on the tile or the sound of water running when every tap in the house is off.
Radiant locates leaks instead of guessing at them. We isolate the hot and cold sides, pressure-test each, listen for the leak with acoustic equipment and confirm the spot with thermal imaging, then mark it on the floor. From there you get repair options in writing: a direct repair at that spot, a reroute overhead that leaves the slab alone, or, on an older system with a history of leaks, a whole-home repipe. Leaks under the yard are handled the same careful way on our water line repair page, and drain leaks get a camera inspection rather than a shovel. Every option is priced before we start and covered by the Home Comfort Guarantee.
Looking for your local team? See leak detection in Austin or leak detection in San Antonio.
What to Watch For
Hidden leaks rarely announce themselves with a puddle. They show up on the bill and in the floor first.
Same household, same habits, a bill that climbed. A pressurized leak runs 24 hours a day, and the utility meter counts every gallon.
Hot-side slab leaks heat the concrete above them. Bare feet on tile find them before anyone else does.
Shut off every fixture and watch the small dial on the meter. If it moves, water is leaving the system somewhere.
A hiss or rush behind a wall or under the floor when no tap is open. Loudest at night when the house is quiet.
Water wicks up drywall and lifts laminate long before it pools. A musty smell in one room is a clue worth taking seriously.
A hot-side leak keeps pulling cold water into the tank, so the burner or elements run constantly and hot water still runs short.
What We Find and Fix
One licensed plumber locates the leak and repairs it. You do not pay two companies to hand the problem back and forth.
How It Works
Narrow it down first, then listen. Nobody opens a floor on a hunch.
We shut the house down, watch the meter and check the water heater. That tells us there is a leak and roughly how big it is.
Each side is pressure-tested on its own. Losing pressure on the hot side alone cuts the search area in half before we listen.
Acoustic equipment follows the sound of escaping water through the slab or wall, and thermal imaging confirms the spot. We mark it.
Direct repair, reroute or repipe, each explained and priced in writing. You choose, then we fix it and pressure-test the result.
Save on the work your home needs most.
That water is going somewhere. Let us find where before it finds your foundation.
Don't just take our word for it — hear from our satisfied customers
Maintenance Membership
Home maintenance for $9.99 a month.
Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.
Do the meter test. Make sure nothing in the house is using water: no running toilets, no ice maker cycling, no irrigation. Find your water meter, usually in a box near the street, and note the reading or watch the small leak indicator dial. Wait 20 to 30 minutes without using any water, then look again. If the reading changed or the dial moved, water is leaving the system somewhere between the meter and your fixtures. Next, walk the house barefoot and feel for warm tile, listen at quiet hours for running water, and check under sinks and around the water heater. If the meter moves and you cannot find the source, that is when leak detection earns its keep.
Two reasons: how our homes are built and what they sit on. Most houses here are slab-on-grade, with copper or older galvanized water lines run in or under the concrete. Much of Central Texas sits on expansive clay that swells after rain and shrinks hard in a dry summer, so the slab and the soil beneath it move a little every season. That movement works on the pipe year after year until a joint fails or a line wears through against the concrete. Very hard water adds to it, especially on the San Antonio side, where mineral-laden water is tough on copper over decades. None of this means your slab is failing. It means a pipe under it is, and that is repairable.
Not always, and often we would rather not. Once the leak is located, there are usually two ways to fix it. A direct repair opens the slab at that one spot, replaces the failed section and patches the concrete. A reroute abandons the leaking run under the slab and replaces it with new line through the attic or walls, which avoids the floor entirely and is often the better choice when the flooring is expensive or the line has leaked before. On an older home with a pattern of leaks, we will also give you a price for a full repipe, because fixing the same system one leak at a time gets expensive. You see all the numbers and pick.
Close enough to mark the floor or wall and open only that spot. Acoustic leak detection listens for the specific sound of pressurized water escaping a pipe, and the signal is loudest directly over the leak. Thermal imaging then shows the heat or moisture pattern to confirm it. Pressure isolation tells us in advance whether it is the hot or cold system, which keeps us from chasing the wrong line. Depth, slab thickness and background noise all affect the work, which is why we take the time to test rather than rush to a guess. The goal is one small opening, not an exploratory trench through your living room.