A slab leak is found before it is fixed — and finding it accurately is what keeps the repair small. Wagner Plumbing locates hidden water leaks in Fairhope, AL and Baldwin County using acoustic listening, thermal imaging, and pressure isolation, pinpointing the failure to within inches instead of opening up floors to search. That applies to slab leaks under the foundation, leaks inside walls and ceilings, and unexplained water loss showing up only on the meter.
Definition
Slab leak detection is the location of a water line failure beneath a concrete foundation using acoustic listening, thermal imaging, and pressure testing — pinpointing the leak to within inches so the repair does not require breaking up the whole slab.
How Do I Know If I Have a Slab Leak?
The three clearest signs of a slab leak are a warm spot on the floor, the sound of running water with every tap closed, and a water bill that jumps with no change in use. Cracked flooring and a persistently damp patch of carpet follow.
You can confirm it yourself in about two hours. Shut every fixture in the house, photograph the meter, wait, then photograph it again. If the reading moved, water is escaping somewhere between the meter and your fixtures — and if nothing is visibly wet, that points under the slab.
| Sign | What it usually means |
|---|---|
| Warm spot on the floor | Hot-water line leaking under the slab |
| Meter moves with all taps off | Active leak on the pressurized side |
| Running water sound, nothing on | Pressurized leak inside slab or wall |
| Water bill up, usage unchanged | Continuous hidden leak |
| Damp carpet or buckling floor | Leak surfacing through the slab |
| Wet patch in the yard, pressure normal | Irrigation or service line leak, not the slab |
What Happens After You Find the Leak?
Location and repair are two separate decisions. Once we know exactly where the pipe failed, an accessible line is fixed directly, while a leak under the slab is often bypassed rather than excavated.
Rerouting the affected line overhead or through a wall is frequently cheaper and far less disruptive than jackhammering a foundation — that is pipe rerouting. A reachable pipe is straightforward water leak repair. When the same house develops leak after leak, the pipe material is the problem and whole-home repiping ends the cycle. Serving Fairhope, Daphne, Spanish Fort, and Baldwin County.
Non-Invasive Leak Detection
Every property is different, so our approach is targeted and practical. Depending on your symptoms and access, leak detection may include:
- Review of symptoms (where/when you notice moisture, sounds, pressure changes, or water use)
- Checking visible fixtures and valves (toilets, faucets, hose bibbs, supply stops)
- System checks and targeted testing (such as controlled isolation and verification)
- Moisture confirmation around affected areas to help narrow the source
- Clear explanation of likely leak location and recommended next steps
Signs of a Hidden Water Leak
Hidden leaks often start small and quietly. We commonly investigate issues such as:
- Slab leak symptoms (persistent moisture, warm spots, or constant water usage)
- Pinhole leaks in supply lines
- Toilet leaks (flapper/fill valve issues that run intermittently)
- Leaks under sinks, behind cabinets, or around shutoff valves
- Water heater connections and nearby piping
- Yard/supply line leaks that create soft spots or pooling
When Leak Detection Is Urgent
Call right away if you have active flooding, water near electrical outlets, or a sudden, unexplained drop in water pressure. If the issue is slower (like a gradually rising water bill or a musty smell), it's still worth addressing soon-small leaks can turn into big repairs.
What to Expect
Most leak detection appointments take about 60-120 minutes depending on the size of the property and whether the leak is intermittent. We'll walk you through what we're seeing, what it likely means, and the best repair options. If you already know it's a water leak issue, you may also want to review our related services like Water Leaks or Water Line Repair.
Leak Detection Pricing in Fairhope
| Service | Typical Range |
|---|---|
| Leak Detection Diagnostic | Typically starts within a reasonable range; call for a quote |
| Leak Repair (if needed) | Varies by location, materials, and access |
Pricing note: costs vary based on the leak location (wall vs. slab vs. yard), how many areas need to be tested, and accessibility. We'll explain the likely scope before moving forward.
Ready to stop guessing and get answers Call (251) 203-1414 to schedule leak detection in Fairhope.