Slab Leak Repair in Largo, FL

  • Non-Invasive Leak Detection
  • Honest Repair vs. Reroute Options
  • Fully Licensed, Insured & Code-Compliant
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Protecting Your Largo Home’s Foundation from Hidden Water Damage

Positively Plumbing pinpoints hidden slab leaks using advanced acoustic and pressure testing, finding the exact failure before we ever touch your concrete. Because unchecked leaks threaten your foundation, Largo homeowners need a fast solution without destructive exploratory demolition.

Discover our complete range of non-invasive detection and repair options below—including spot repairs, rerouting, and repiping. Led by Kevin, our crew stops the damage first and fixes it right. You will always receive honest recommendations, upfront written pricing, and absolutely zero surprises on your invoice.

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Common Signs of a Slab Leak

A slab leak occurs when a supply or drain line running beneath your concrete slab foundation springs a leak, and the water has nowhere to go except into the soil and up through the concrete.
The damage builds for weeks before anything visible reaches the surface — these are the common signs that show up first.

Warm or Hot Spots on the Floor

Hot spots on the flooring can indicate a broken hot-water line under the concrete slab, heating the surface directly above it. Walk the floor barefoot in the morning — a warm patch in one spot with no sun on it points to leaking pipes below.

A Water Bill That Jumped With No Explanation

Leaking water under the slab runs around the clock, which shows up on the bill long before it shows up on the floor. Watch the water meter with every fixture off — if the dial is still moving, water is escaping somewhere in your plumbing system.

Running Water When Everything Is Shut Off

With every fixture and appliance off, the house should be silent, so any sound of moving water means a line is leaking somewhere it shouldn’t. The sound often carries through the concrete slab, which makes it hard to place by ear and easy to dismiss.

Low Water Pressure Throughout the House

A leak under the concrete foundation bleeds off pressure before it ever reaches your fixtures, so every shower and faucet in the house runs weak at once. Pressure that drops at one fixture points elsewhere, but a whole-house drop points down.

Cracked Tile, Uneven Floors, or Foundation Cracks

Water eroding the soil beneath the slab shifts the concrete above it, which cracks tile and grout and leaves floors visibly uneven. Cracks in the concrete slab foundation itself are the late-stage version of the same problem and the most expensive one to reach.

Damp Spots, Pooling Water, or a Musty Smell

Moisture wicking up through the slab dampens flooring and carpet, and a musty odor over a slab floor usually means mold has been growing a while. Standing or pooling water with no source above it is the clearest sign the leak is directly underneath.

Our Slab Leak Repair Services

Our slab leak repair services start with detection.
Once we know exactly where and why the line failed, we lay out the options in plain language and let you decide.
There’s no single right repair method for every home.

Spot Repair Through the Slab

We open the concrete over the leak, replace the damaged pipe section with new pipe, and patch the slab. The right call when the rest of the line is sound, and the leak is a single, accessible failure — the most direct way to fix a slab leak when one spot has gone.

Trenchless Repair & Epoxy Lining

For some lines, a trenchless repair requires only minor demolition and restores the pipe from the inside using an epoxy resin liner — a corrosion-resistant lining cured in place. It’s an option when the pipe is intact enough to line rather than replace.

Pipe Rerouting Above the Slab

Instead of opening the floor, we abandon the failed line under the slab and reroute new plumbing lines overhead through the walls and attic. Pipe rerouting involves installing new pipes above the slab, and it’s often the smarter call when the under-slab line is hard to reach, or the flooring above it is expensive to restore.

Repipe

When the slab leak is the third failure on lines corroding throughout, another spot repair just delays future leaks. Repiping the house in copper or PEX plastic pipes — cross-linked polyethylene, which resists the corrosion that kills metal lines — ends the cycle of repeat plumbing leaks. We’ll tell you honestly when the pattern points here rather than sell you repeat repairs.

Our Slab Leak Detection and Repair Process

Four steps from first call to a verified fix — we find the exact location before anyone breaks concrete.

Step 01

Confirming the Leak and Reviewing Common Signs

We start with what you’ve noticed: a warm floor, a jumped bill, or the sound of a water leak with everything off. A meter test confirms water is escaping, since slab leaks stay hidden under concrete and early detection is what keeps wasted water from becoming structural damage.

Step 02

Leak Detection to Pinpoint the Exact Location

Acoustic listening equipment and thermal imaging locate leaks through the concrete slab without guesswork. We isolate the line, check whether it’s a hot-water run off the water heater or a cold supply, and mark the exact location.

Step 03

Choosing the Repair Method

Spot repair means opening a small section of concrete to reach the leaking pipe, and it’s the right call when the rest of the line is sound. Corroded galvanized pipes with multiple failure points get pipe rerouting or repiping instead — a new line run around the slab for a system that stops leaking for good.

Step 04

Repair, Verification, and Restoration

We complete the repair, pressure-test the line, and confirm the leak is resolved before closing the opening back up. You get the pipe’s condition documented, and we flag anything that suggests the same failure is coming elsewhere on the system.

Why Pinellas County Homeowners Choose Positively Plumbing

Family-Owned and Locally Operated

A Largo-based company that values community and personalized service. Kevin runs the trucks, so the plumber who finds your leak is the same one who repairs it.

Licensed, Insured, and Guaranteed

Fully licensed and insured, carrying general liability and workers’ compensation. Every repair carries a one-year workmanship warranty in writing.

Upfront Pricing in Writing

Diagnostic, repair options, and total cost before any work starts. No hourly meter, no surprise add-ons on the invoice.

Honest Repair Recommendations

We lay out spot repair, reroute, and repipe with the trade-offs of each, then let you decide. No steering you toward the biggest job.

Slab Leak Detection Done Right

Acoustic and pressure-test diagnosis to pinpoint the leak before any concrete is opened. We find it first, then fix it — no exploratory demolition.

Slab Leak Emergency? We Answer Day or Night


A slab leak actively flooding or undermining your home’s foundation can’t wait — left unchecked, it threatens the structural integrity of the house. Positively Plumbing runs 24/7 emergency response across Pinellas County.

A licensed plumber picks up, walks you through shutting off the water while we’re on the way, and gives you a written price before any work begins. We stop the damage first, then deliver a long-term, code-compliant fix — catching it early is the difference between a routine repair and costly damage to floors and foundation.

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Service Areas

We provide hydro jetting and drain cleaning plumbing services across Largo, Clearwater,
Pinellas Park, and communities throughout the greater Tampa Bay area.

Largo
Ridgecrest
Belleair Bluffs
Belleair
Seminole
Harbor Bluffs
Indian Rocks Beach
Belleair Beach
Clearwater
Bardmoor
Belleair Shore
Indian Shores
Redington Shores
Madeira Beach
Redington Beach
Feather Sound
N. Redington Beach

Not sure if you’re in our service area? Call (727) 625-0603 — we’ll tell you straight.

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What Customers Say About Us Online

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Frequently Asked Questions

Four things: corroding pipe, abrasion against the concrete, soil movement, and aggressive water chemistry.

Copper and galvanized lines corrode from the inside until a pinhole opens, and one pinhole is rarely the end of it — the rest of that run is the same age on the same system. Hot-water lines usually fail first, since temperature differences between the water and the surrounding concrete stress the pipe wall every time the line cycles.

Abrasion works slower: pipe left uncushioned by poor installation rubs against concrete, rebar, and other rough surfaces until it wears through.

Pinellas sees more slab leaks than most of the country because of the last two. Sandy soil shifts and erodes under the slab, stressing rigid lines until one gives, while aggressive water and high municipal pressure wear down aging pipe from within.

We use acoustic listening equipment and pressure testing to isolate the failed line and pinpoint where it’s leaking under the slab. That lets us open the concrete in one spot over the leak instead of jackhammering the floor to look for it. A quick check you can do yourself: watch the water meter with everything off — if it keeps moving, water is escaping somewhere.

Slab leak repair generally runs $300 to $6,750, though these are industry averages and your actual cost depends on the specifics of your home. Locating the leak typically costs $150 to $400 on its own.

A spot repair through an accessible section of slab sits near the bottom of the range, while tunneling under the foundation to reach the line costs more but keeps the concrete from breaking and the mess outside the house. Foundation work adds to that — crack repair generally runs $250 to $800, and leveling a settled slab $1,000 to $3,000.

Pipe depth, flooring type, how far the line runs under the slab, and whether the leak has already caused damage all move the number. We give you a written price after we locate the leak, so you know your actual cost before any work starts. No hourly meter, no surprise add-ons.

It depends on the line and the home. A spot repair is direct when the rest of the line is sound, and the leak is accessible. Repairs of slab leaks typically take a few hours to a few days. A reroute avoids opening expensive flooring when the under-slab line is hard to reach. If the line is failing throughout, a repipe ends the cycle. We lay out all three and let you decide.

Water seeps into the soil under the concrete slab and keeps going, because a pressurized line doesn’t stop on its own. Saturated ground washes out and settles unevenly, and that shifting soil cracks tile, tilts floors, and eventually reaches the foundation — the point where a plumbing repair turns into structural instability. Moisture wicking up through the slab feeds mold growth in flooring and baseboards well before you can see it.

Slab leaks stay hidden by design, which is what makes early detection difficult and the warning signs worth knowing: a warm patch on the floor, a water bill with no explanation, running water with everything shut off. Catching one at that stage is a spot repair. Catching one after the foundation moves is a much bigger job.

Left alone, it can. Water erodes the soil under the slab and can shift the concrete, cracking flooring and eventually causing structural instability in the foundation. Finding and fixing it early keeps a plumbing repair from becoming a foundation repair.

Coverage varies by policy. Many carriers cover the water damage from a slab leak and the cost to access the pipe, but not always the pipe repair itself. We’re not insurance advisors, but we provide the written documentation and photos you’ll need to file a claim.

Get Your Slab Leak Repair Estimate Today!

Warm spot on the floor or a water bill that won’t quit? Contact Positively Plumbing today for slab leak detection and a written estimate. You’ll get a straight answer, honest repair options, and work you’ll be glad to recommend.

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