Slab Leak Repair in St. Louis, MO
A warm spot on the tile or water you hear but cannot see usually means a slab leak. We detect and repair them for homes in St. Louis, MO.
- Same-Day Slab Leak Detection
- Expert Foundation Repair
- Modern Equipment
- Upfront Pricing
Get Your Slab Leak Repaired Today in St. Louis, MO.
Call today for slab leak detection and a written comparison of spot repair and reroute pricing.
Reliable Slab Leak Repair for Your St. Louis, MO Home
FGV Plumbing detects and repairs leaks in water lines running beneath concrete slab floors. Hot water slab leaks are particularly common because heat, mineral content and expansion wear copper faster where it touches concrete and gravel. Water in much of Missouri is moderately hard to hard, so scale gradually builds in water heaters, faucets and appliances. We find the leak, then repair it through the floor or reroute the line overhead.
Our expertise includes:
- Accurate electronic leak detection
- Foundation-safe repair methods
- Hot and cold line reroutes through attics in PEX-A

Additional Plumbing Repair Services in St. Louis, MO
We offer expert plumbing repair services across St. Louis, MO to stop leaks, clear blockages, and keep every fixture working the way it should.

Customers
Why Choose FGV Plumbing for Slab Leak Repair in St. Louis, MO?
A slab leak runs around the clock, wasting water, raising your bill and soaking the soil under your home. The sooner it is fixed, the less damage it causes.
- Clear Comparisons, You see the cost of spot repair and reroute side by side.
- Local Knowledge, We know how local soil conditions affect foundations and underground piping in Missouri.
- Foundation Safety, Our repair methods are designed to protect your home's structural integrity, fixing the leak source without weakening your foundation.
Citywide Coverage
FGV Plumbing proudly serves every neighborhood in St. Louis, offering prompt and reliable slab leak repair services. Whether you are in the heart of downtown or in the surrounding communities, our team is ready to respond fast to your plumbing emergency.
Experienced Team
Our reroute crews are skilled at running new PEX through attics and walls with small, clean openings. They work efficiently even in cramped attics.
Safety-First Approach
We take careful measure to prevent further damage during the repair process, including proper shoring and backfilling, and always leave your property clean and secure after the work is complete.
Trusted Certified St. Louis Plumbing Services Professionals
At FGV Plumbing, we take pride in providing certified plumbing services throughout St. Louis, MO. Backed by leading industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver long-lasting results you can trust.
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PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationTrusted Slab Leak Repair Services in St. Louis, MO
Tunneling Slab Leak Repair in St. Louis, MO
In some cases, especially when the leak is under a load-bearing wall or in a hard-to-reach area, tunneling beneath the foundation is the preferred method. This allows our plumbers to reach the damaged pipe from outside your home, avoiding disruption to your interior floors and finishes. Tunneling spares the interior but requires skilled excavation and shoring to protect structural integrity throughout the repair process in St. Louis, MO.

Slab Leak Detection in St. Louis
We start by shutting off fixtures and watching the meter to verify a leak. Then we isolate the hot and cold lines to determine which one is leaking. Using acoustic ground microphones, we listen for the sound of escaping water through the concrete. Thermal imaging shows hot water leaks as warm areas on the floor surface.
Cold Water Slab Leak Repair in St. Louis
Cold water slab leaks are harder to feel but still waste water and wet the soil. They often show up as a high water bill or a meter that moves with all fixtures off. We isolate the cold line, locate the leak and repair or reroute it. Fixing cold leaks quickly helps protect your foundation.
Slab Leak Reroute in St. Louis
Rerouting is often the best long-term choice, especially with older copper lines. We abandon the leaking line under the slab and run a new PEX line through the attic and walls. Openings are small and placed where patching is easiest. Reroutes end future leaks in that section of pipe.
Spot Repair Through the Slab in St. Louis, MO
When the leak is isolated and the rest of the pipe is in good shape, a spot repair through the slab is a practical option. We cut a small opening, dig down to the pipe and replace the damaged section. The trench is compacted and the concrete is patched. Flooring is then restored by your preferred contractor.
Pipe Rerouting and Repiping in St. Louis
For more extensive damage, multiple leaks, or pipes that are too old and corroded to repair reliably, pipe rerouting is a long-term solution. This involves abandoning the leaking line under the slab and installing a new pipe through the walls or attic. This method skips the problem area entirely, providing a fresh, durable plumbing line. It is a common solution for aging homes in St. Louis with original copper or galvanized plumbing.
PEX Repiping for Slab Leaks in St. Louis, MO
If multiple slab leaks point to a systemic issue with your home's original plumbing, a full PEX repipe might be the most cost-effective and durable solution. PEX tubing is flexible, corrosion-resistant, and less prone to leaks caused by foundation shifts, making it a strong choice for many homes. We can replace all the water supply lines in your St. Louis home, providing a brand-new, leak-free plumbing system that will last for decades.

Electronic Slab Leak Detection in St. Louis
Locating a hidden slab leak takes specialized tools. Our plumbers use sensitive electronic listening devices and thermal imaging cameras to pinpoint the exact location of the leak under your concrete foundation. This precision detection minimizes the need for extensive concrete removal, saving you time and money. We can detect leaks in both hot and cold water lines, as well as sewer lines, for a complete diagnosis of your St. Louis home.
Slab Leak Repair Near Me in St. Louis, MO
We understand slab construction and soil conditions common in this area. That helps us recommend the repair method that best protects your home. Call us to schedule slab leak detection.
Don't let a hidden slab leak undermine your home. For expert slab leak repair near me, FGV Plumbing offers prompt service and lasting results throughout the St. Louis area. Trust our skilled plumbers to handle your foundation plumbing issues with precision and care.
FGV Plumbing at a Glance
- Licensed and insured plumbers serving St. Louis, MO
- Same-day appointments and 24/7 emergency response
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 307+ Missouri customers
St. Louis Map
St. Louis Information
- Population
- 281,754
- Area codes
- Local
- Service area
- St. Louis and communities within 40 miles
- Nearby
- University City, Florissant, Oakville, Ballwin
Mid-century homes typically have copper supply lines, while newer houses rely on PEX and plastic drain pipe. When water lines run under the concrete, water chemistry, heat and shifting soil can make slab leaks one of the more common plumbing repairs in St. Louis, MO.
Expert Services
Trust our professionals for reliable FGV Plumbing solutions in St. Louis, MO.
Our Specialized Plumbing Services in St. Louis, MO
At FGV Plumbing, we provide a complete range of plumbing services across St. Louis, MO. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Slab Leak Repair Process Works in St. Louis, MO
We follow a clear, step-by-step approach to carefully detect, diagnose, and repair slab leaks in St. Louis, MO.
Request a Quote
Contact FGV Plumbing at (816) 330-2338 to schedule an inspection for your suspected slab leak. Our friendly staff will gather initial information and arrange for a professional plumber to visit your St. Louis property.
Leak Detection
Our skilled technicians use sensitive acoustic and thermal imaging equipment to accurately locate the exact source of the slab leak. This precise detection prevents unnecessary damage to your foundation.
Repair & Restore
Based on the leak's location and severity, we perform the most appropriate repair, whether it's direct pipe repair, rerouting, or repiping. We then restore the affected area with minimal impact to your home.
Frequently Asked Questions About Slab Leak Repair in St. Louis
Slab leak detection usually costs $150 to $450. Spot repairs through the slab usually run $1,500 to $4,000, and reroutes often range from $1,800 to $5,000. Whole-house repipes are quoted based on home size.
Homeowner's insurance policies vary, but many cover the cost of damage caused by a sudden and accidental slab leak, although the repair of the pipe itself might not be covered. It is best to check with your insurance provider right away after detecting a leak. We can help provide necessary documentation for your claim.
If the pipe is in good condition and the leak is easy to reach, a spot repair can work. If the pipe is old or you have had prior leaks, a reroute is usually the better long-term value.
Simple spot repairs often do not need a permit, but reroutes and repipes may, depending on your city. We take care of permits when required.
Common causes include corrosion from hard water, abrasion where pipes rub against concrete or gravel, poor installation, high water pressure and soil movement. Hot water lines are particularly vulnerable.
Slab leak repair is a complex job that requires specialized tools and expertise. Trying a DIY repair can lead to further damage to your plumbing system or foundation, potentially costing more in the long run. It is always best to hire a professional plumber from FGV Plumbing for slab leak detection and repair.
Depending on the extent of the repair, especially if it involves major structural work, pipe rerouting, or changes to the main water line, a plumbing permit may be required by local authorities. FGV Plumbing will handle all necessary permit applications so your slab leak repair is fully compliant with local building codes.
Absolutely. Water steadily leaking under your foundation can erode the soil, leading to voids and uneven settlement, which can cause cracks in your foundation, walls, and flooring. Expansive clay soils are common in Missouri, and they swell and shrink with moisture, putting stress on foundations and buried lines.
What People Are Saying About Our Plumbing Experts?

Emily R.
I called FGV Plumbing for plumbing repair, and the technician was fast, polite, and thorough. They explained the problem clearly and fixed it the same day. I will definitely hire them again. Highly recommended!
Plumbing Repair · Florissant, MO
Patricia H.
We had a slab leak that two other companies could not find. FGV Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Florissant, MO
James P.
Our commercial plumbing system had a leak under the sink, and FGV Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · University City, MO
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · St. Charles, MO
Mark T.
When our office needed drain cleaning, FGV Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Ballwin, MO
Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Ballwin, MO













