Find the leak. Don’t demo the house.
A water bill that doubled overnight. A warm spot on the kitchen floor in February. The sound of water moving when nothing’s on. Hidden leaks are sneaky, and the cost of guessing wrong is drywall, tile, and trim. Our job is to find the exact location with the smallest possible cut.
Quick answer: Professional leak detection in Dillsburg costs $260–$540 depending on access, building size, and number of suspected zones. Acoustic listening, electronic correlators, and thermal imaging let us pinpoint most slab and wall leaks within a 6″ radius - often without removing any drywall at all.
Six signs your house has a leak you can’t see
- Water bill jumped 30%+ with no behavior change. Pull your meter dial - if it’s spinning with everything off, you have an active leak somewhere.
- Hot spot or warm tile on a slab floor. Almost always a slab leak on the hot side of the system.
- Cracked or buckled flooring over a slab, especially near a kitchen or bathroom wall.
- Unexplained mildew smell in a closet or laundry room.
- Lush green patch in the lawn when the rest of the grass is brown - classic outdoor service line leak.
- Pressure that drops when no fixtures are running. Test by isolating the house at the main shutoff.
How we actually find leaks
Each tool answers a different question. Most jobs use two or three of them in combination.
Static pressure isolation
First step. We isolate sections of the system at shutoff valves and pressurize each one with calibrated air. The section that won’t hold pressure is the one with the leak. This narrows the search before we ever pick up a microphone.
Acoustic listening
A pressurized pipe with a small leak makes a specific high-frequency sound. We use ground microphones for slab leaks and contact mics for wall and ceiling leaks. The closest reading is usually within an inch of the actual hole.
Thermal imaging
A FLIR camera shows temperature differences invisible to the eye. Hot-side slab leaks light up like neon. Cold-water leaks show as cool patches. Especially useful in basements and ceilings.
Tracer gas
For tougher cases (long underground lines, complex slabs), we introduce a hydrogen-nitrogen blend into the pipe and sniff for it on the surface with a sensor. Locates outdoor water-service leaks within inches.
Moisture mapping
A pinless moisture meter shows the wet zone behind drywall and under flooring. Helps confirm where the leak is migrating versus where it’s actually coming from.
Camera scope (drainage leaks)
For drainage leaks (wet basement walls, ceilings under bathrooms), we run a camera through the drain to find the actual cracked or offset section. Sometimes the “supply leak” was a drain leak the whole time.
What we charge, and what you get
| Scenario | Approx. cost | What’s included |
|---|---|---|
| Single suspected zone (kitchen slab, ceiling, bathroom wall) | $260–$340 | Pressure isolation + acoustic + thermal, written report with photo, exact pin-pointed location. |
| Whole-house investigation, no obvious zone | $380–$540 | System-wide isolation, all rooms scanned, irrigation and outdoor service line checked, written report. |
| Outdoor water service line | $340–$520 | Tracer gas survey, depth marked, written report with sketch. |
| Repair quote after detection | quoted separately | Slab access cut, pipe section replacement, patch and finish - all flat-rate. |
Detection fee credits 100% toward any repair you authorize on the same visit.
FAQ
Can you find a leak without breaking anything?
How long does a slab leak detection take?
What about leaks on the cold side?
Will my insurance cover the repair?
Can you reroute a slab leak instead of repairing it?
Mystery water bill?
We’ll find it before you start tearing up walls.
Other plumbing services we handle in Dillsburg & Central PA
Whatever the job, our master-licensed plumbers from 2 W York St handle it under one roof. Click any service for the full breakdown - or just call (223) 200-3488 and we'll dispatch.
Cities we cover from our Dillsburg shop
Our trucks reach every borough and township in York County and Cumberland County. Tap a city to see local plumbing notes, or call us at (223) 200-3488.