Slab Leak Repair in Largo, FL
Find the leak under your floor before it undermines it. Contact Positively Plumbing for slab leak detection and repair, and get straight answers from a licensed Pinellas County plumber.
Slab Leak Specialists for Largo’s Concrete-Slab Homes
Most Largo homes sit on a concrete slab foundation, with water pipes running through or beneath it. A slab leak occurs when one of those lines in your plumbing system fails, and the water has nowhere to go but into the concrete foundation and up into your floors. Nationally, 63.2% of new single-family homes were built on slab foundations in 2019, so this is a common failure — and a slab leak doesn’t show itself the way a burst pipe does. It hides underground, running up your water bill and soaking the slab for weeks before you feel a warm spot or see the damage.
Positively Plumbing locates slab leaks acoustically and with pressure testing, so we find the exact location of the failed line before we open any concrete. Kevin runs the crew. You get a written price before the work starts, an honest walk-through of your repair options — spot repair, pipe rerouting, or repipe — and no surprises on the invoice. We stop the damage first, then fix it right.
Warning Signs of a Slab Leak
Warm Spots on the Floor
Damp spots on floors can indicate a slab leak. A hot-water pipe leaking under the slab heats the floor above it.
Water Bill Up With No Explanation
A line leaking under the slab runs constantly, wasting water around the clock. It shows up on the bill long before it shows up on the floor. A quick check: watch the water meter with everything off — if it’s still moving, water is escaping somewhere.
The Sound of Running Water When Everything is Off
If you hear water moving with every fixture and appliance shut off, water is escaping under the slab, or somewhere else it shouldn’t be.
Low Water Pressure Throughout the House
A leak under the slab bleeds off water pressure before it reaches your fixtures, so the whole house runs weak.
Cracks in Flooring or the Foundation, or Uneven Floors
Water eroding the soil beneath the slab shifts the concrete, which cracks tile and grout, produces uneven floors, and eventually stresses the foundation itself. Cracks in the foundation can be a sign of a slab leak.
Damp Spots, Pooling Water, or a Musty Smell
Moisture wicking up through the slab creates damp spots and dampens flooring, and standing or pooling water and a musty smell point to mold growth you’ll notice before you see it. Musty odors from carpet over a slab are a red flag. Any one of these warning signs is worth a call before the damage spreads.
What Causes Slab Leaks in Pinellas County Homes
Abrasion Against Rough Surfaces
A line rubbing against the concrete, rebar, or other rough surfaces as water flows through it wears a hole over years. Poorly cushioned pipe — often the result of improper installation or poor installation during the original build — is a common culprit.
Soil Movement, Expansion, and Erosion
Florida’s sandy soil shifts. Soil expansion, soil movement, and soil erosion under the slab let the concrete settle, and that movement stresses the rigid water lines and underground pipes running through the foundation until one fails. Growing tree roots can also damage pipes beneath slab foundations.
Water Chemistry, Temperature, and Pressure
Aggressive water chemistry and the chemical reactions it drives corrode lines from the inside, temperature differences stress the pipe wall, and high municipal pressure wears aging pipe. Together they shorten the life of the supply lines and plumbing materials beneath your floor.
Corrosion in Copper and Galvanized Pipes
The hot-water lines feeding your water heater sit under the same slab and fail the same way. Once one pinhole opens in a corroding line, water escaping under the slab is rarely the end of it — multiple leaks usually follow along the same run, and other pipes on the same corroding system tend to go next. Older cast iron and galvanized pipes are especially prone to it.
How We Find the Slab Leak: Detection and Repair
We don’t jackhammer the floor to go looking. Our slab leak detection uses acoustic listening equipment and pressure testing to locate leaks and isolate the failed line, pinpointing exactly where water seeps under the concrete. Because a slab leak hides underground, making early detection harder, we lead with diagnostics — that means we open the slab in one place, over the actual leak, instead of guessing and opening several.
We fix slab leaks by finding the water leak first, which is what keeps a slab repair from turning into a demolition project, and it protects the structural integrity of the home before soil erosion causes serious damage, structural damage, or even structural instability in the foundation. Pinpointing the leak first also tells us whether you’re dealing with a single failure or a line failing along its whole length — which changes the right repair method.
Your Slab Leak Repair Options
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.
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, with general liability and workers’ compensation coverage. 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 the trade-offs of spot repair, rerouting, and repiping, 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.
Service Areas
We provide hydro jetting and drain cleaning plumbing services across Largo, Clearwater,
Pinellas Park, and communities throughout the greater Tampa Bay area.
Not sure if you’re in our service area? Call (727) 625-0603 — we’ll tell you straight.
What Customers Say About Us Online
Frequently Asked Questions
Get Your Slab Leak Repair Estimate
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.