Gregg County sits largely on expansive clay that swells through a wet winter and shrinks hard through a dry summer. Anything rigid cast into a slab foundation is strained by that cycle, which is why slab leaks are common here and why they cluster when a long dry spell finally breaks.
Napps Plumbing — Longview & East Texas since 1957
Finding it accurately is most of the value. Opening a foundation in the wrong place is what makes these jobs expensive.
Water escaping a pressurised line under concrete makes a characteristic sound that carries through the slab. With ground microphones it can be narrowed to a foot or two.
Isolating and pressurising sections tells us whether the leak is on the hot line, the cold line or the drain side — three quite different repairs.
Opening the slab at the located point, repairing the pipe, and restoring the concrete. The right answer for a single isolated failure.
Abandoning the failed run and routing a new line overhead or through walls. Often less disruptive than opening the foundation, and it removes the pipe from what broke it.
Where a slab has produced multiple failures, replacing the whole run rather than chasing leaks one at a time is usually the better economics.
An active slab leak is putting water under and beside your foundation continuously. That is a structural concern as well as a plumbing one.
This is not a generic plumbing problem. The soil under Longview is a large part of the explanation.
Clay soil takes on water and swells, then dries and shrinks. Across a wet winter and a dry East Texas summer that is substantial movement, and it is not uniform — one part of a foundation lifts while another settles. Water lines cast into that slab are rigid and they are strained by every cycle. It is why slab leaks here follow the weather, and why we see clusters of them after a long drought breaks.
Leak Detection →Hot lines expand and contract with every draw, and under a slab that movement works the pipe against whatever it rests on — rebar, gravel, the concrete itself. Over decades that abrasion thins the wall until it perforates. It is also why the classic symptom is a warm patch on the floor: hot water leaking beneath the slab warms the concrete above it in a way nothing else does.
Water Heaters →Copper in contact with concrete and certain soil chemistries can corrode from the outside in, producing pinhole leaks with no mechanical cause at all. This matters because it tells you something about the rest of the run — if one pinhole has appeared through electrolysis, the same conditions apply along the whole line, and a spot repair may be buying a short reprieve.
Pipe Repair →A spot repair is right for a single isolated failure with no reason to suspect the rest of the line. Rerouting makes more sense when the pipe has already failed once because of soil movement or electrolysis, because those conditions have not changed and the rest of that run is subject to them. Rerouting also avoids opening the foundation at all, which for some houses is the deciding factor. We give you both numbers and our reasoning rather than only the one we would rather do.
Plumbing Installation →Assessed for your situation — this is the general pattern.
| Situation | Usually | Why |
|---|---|---|
| Single failure, line otherwise sound | Spot repair | No reason to suspect the rest |
| Pinhole from electrolysis | Reroute | Same conditions apply along the run |
| Second failure on the same line | Reroute or repipe | A pattern rather than bad luck |
| Leak under a finished floor you value | Reroute | Avoids opening the slab at all |
| Multiple lines affected | Repipe | Chasing individual leaks stops being economic |
Or call 903-758-6482 — 24/7
Locate first, decide second, open concrete last — and only once.
Meter test and section isolation establish that water is escaping and roughly where before any equipment comes out.
Acoustic listening and thermal imaging narrow it to a specific point rather than a general area.
Spot repair against reroute, with both numbers and the reasoning, so you are choosing rather than being told.
Concrete opened once at the located point, pipe repaired or rerouted, and the floor made good.
These are the symptoms people describe, in roughly the order they usually notice them.
The saving on this kind of work is entirely in not opening the wrong part of the floor.
Or call 903-758-6482 — available 24/7
These come straight from our Google Business Profile — unedited, and updated automatically as new reviews come in.
What people ask when they suspect a leak under the foundation.
It is a water supply line running beneath the concrete foundation that has begun to leak. They are common here because much of the area sits on expansive clay that swells when wet and shrinks in a dry summer, straining anything rigid cast into the slab. Hot water lines fail more often than cold, because thermal movement abrades the pipe against whatever it rests on.
The simplest test costs nothing: turn off every fixture and appliance that uses water, note the meter reading, and check it fifteen minutes later. If it has moved, water is escaping somewhere. Other strong indicators are a bill that rose without a change in use, a warm patch on a tile or concrete floor, and the sound of running water in a quiet house with everything off.
Yes, and that is the entire purpose of the detection step. Acoustic listening equipment picks up the sound of water escaping a pressurised line through the slab, thermal imaging shows the warm signature of a hot water leak, and section pressure testing confirms which line it is on. The concrete is then opened once, at that point, rather than exploratorily.
It depends on where the leak is, how accessible it is, and whether a spot repair or a reroute makes more sense. Detection is a separate step and separately priced, which is deliberate — it means you are not committing to a repair approach before anyone knows where the problem is. We quote the repair flat once it has been located.
Sometimes, and it is always worth asking. If the line failed because of soil movement or electrolysis, the rest of that run is subject to the same conditions, so a spot repair may only buy time. Rerouting the line overhead or through walls removes it from the environment that broke it, and avoids opening the foundation at all. For a single isolated failure a direct repair is usually the better value. We will give you both prices.
Policies vary a great deal and we are plumbers rather than insurance advisers, so check with your carrier. As a broad generalisation, many Texas policies contribute towards accessing the leak and repairing the damage the water caused, while treating the failed pipe itself differently. Documented detection findings tend to help a claim, and we can provide what we found in writing.
Leak detection, pipe repair and repiping each have their own page.
We locate it acoustically before any concrete is opened — which is where the real saving on this work sits.
Tell us what you have noticed — the bill, a warm floor, a sound, damp flooring. The more detail, the faster the search.
