Slab Leak Detection in Sarasota, FL

My name is Mike Reynolds. I’m the owner of Plumbing Detectives LLC, a licensed master plumber — license CFC1434139 — based in Venice and serving the Sarasota market. Plumbing Detectives LLC’s work has been featured on AP News, Apple News, Business Insider, MarketWatch, and Yahoo Finance.

I’ve written elsewhere about a downtown Sarasota commercial job where the owner was convinced the entire plumbing system had failed — and the diagnosis proved the copper mains were fine while cheap CPVC branch lines were the actual problem. That’s the Sarasota leak story in miniature: the oldest, most varied housing stock in this region produces the most mysterious leaks, and the difference between an evidence-based diagnosis and an assumption is measured in thousands of dollars. Here’s how I find hidden leaks in this market, what it costs, and what you walk away holding.

Every tool I use answers one specific question. None of them do everything, and I’ve never met a single instrument that replaces the other three.

I run a Mileseey TR20 professional thermal imaging camera, a moisture meter, a Pulsar 2000 line tracer, and geophone acoustic listening equipment — in that order, as one system, on every leak call I run. Named equipment, honestly positioned, the same way I name the Plumber’s Vision system on my sewer pages and Uponor ProPEX on my repipe pages. Sarasota has the most crowded leak detection market in our service area — companies advertising acoustic, thermal, electronic, moisture meters — and to their credit, one local outfit even publishes pricing. But look closer at the equipment claims and you’ll find almost nobody names a specific instrument or explains what each one actually proves. I do.

Thermal imaging finds the neighborhood. The TR20 sees temperature, not water. Wet drywall evaporates and reads cooler than the dry wall around it. A hot supply line leaking under a slab paints a warm plume on the floor above. Hot water leaks are its best case and image clearly. Cold water leaks can read faintly or, depending on depth and flooring, not at all.

A moisture meter confirms what the camera thinks it’s seeing. A thermal image can look like a leak and just be warm for some other reason. The moisture meter reads actual water content before anything else happens.

The Pulsar 2000 traces the exact pipe, not the whole slab. Once I’ve got a general area, I clamp a lead to the target line — the cold-water outlet at the water heater and a fixture stub-out in the suspect zone, for example — and energize just that branch. The wand follows the signal along the pipe’s actual route, and I tape-mark that exact corridor.

Then I make it talk, and the geophones pinpoint the exact spot. With the line isolated and drained, compressed air agitates the water and saturated soil or slab material around a leak into a far louder, more distinct disturbance. Two geophone heads a few feet apart along the traced line, listening for where the sound is loudest and even in both ears — that point is directly above the leak.

One cut, not a search pattern. Before anything gets opened, I scan for rebar, post-tension cable, and conduit so the cut doesn’t create a second problem. Then it’s one core drill or a small opening at the marked spot — not a trench, not a series of test holes.

And the honest limits, because this section is the whole brand: when the full sequence still doesn’t give enough evidence, we don’t guess — we pressure test to isolate the losing line or make one small, targeted opening exactly where the remaining evidence points. I don’t carry tracer gas, and I won’t pretend to. What I carry, I name; what each tool proves, I show you; what it can’t prove, I say out loud. Ask any company you’re comparing one question: “How do these tools work together?” A real answer sounds like a sequence. A vague answer is a tool list wearing a sales pitch.

The investigation runs the same disciplined sequence everywhere I work: the symptom conversation, a visual inspection first (sometimes the mystery is a running flapper — you’ll hear that instead of a scan pitch), then thermal imaging, moisture verification, Pulsar 2000 tracing, and geophone pinpointing as needed to close the case, with you watching the whole time. Plain-language explanation of what the evidence shows and doesn’t. Then the written report and honest options.

When it’s a slab leak in Sarasota’s aging stock, the decision tree matches my repiping pages exactly: an isolated failure in an otherwise sound system can justify a targeted repair; a slab leak in 50-year-old copper usually earns my real recommendation — reroute the line overhead rather than cutting concrete to patch a system failing from the inside. Pressurized supply lines don’t belong under slabs. And when this is the second or third pinhole, that’s not a leak problem anymore — it’s the system talking, and the conversation moves to my Sarasota whole-house repiping page, where the full repair-versus-repipe honesty lives.

When it’s a condo, the finding comes with the documentation the situation actually requires: where the water originated, timestamped, imaged, and on video. Unit-boundary disputes are won and lost on exactly that evidence.

Any repair requiring a permit gets one — City of Sarasota Building and Zoning Division or Sarasota County Planning and Development Services, depending on your parcel, verified before work begins.