Knights Plumbing Has Joined the Tony’s Family

After more than 30 years serving homeowners throughout the Central Valley, Les and the team at Knights Plumbing have partnered with Tony’s Plumbing, Heating & Air, a local, family-operated company proudly serving the area since 1994.

Your same commitment to honest service and quality workmanship remains, now backed by expanded plumbing, heating, and air conditioning expertise. The same care you’ve trusted for decades is here, with more resources to help keep your home comfortable year-round.

Home / Service Areas / Stockton, CA / Plumbing Stockton / Slab Leak Repair in Stockton, CA

Slab Leak Repair in Stockton, CA

A slab leak is one of the most damaging plumbing problems and one of the most frequently misdiagnosed. Water escaping from a pipe beneath your concrete foundation doesn’t show up immediately on the surface. It saturates the soil under the slab, migrates through the concrete, and surfaces as warm spots on floors, damp carpeting, or water pooling near baseboards weeks after the leak began. Knights Plumbing & Drain detects and repairs slab leaks throughout Stockton and San Joaquin County with professional equipment, precise location methods, and repair options that minimize damage to your home.

Call (209)-319-0579 to repair your slab leak today.

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Slab leak detection and repair service in Stockton CA using advanced leak detection tools

What Is a Slab Leak?

A slab leak is a break or failure in a water supply or drain line that runs beneath your home’s concrete slab foundation. In Stockton, these are most commonly hot water supply lines, which are copper pipes that have been corroding from the inside from years of hard water exposure and the thermal expansion and contraction that comes with heating cycles.

Left unrepaired, a slab leak erodes the soil supporting your foundation, causes slab movement or cracking, saturates subfloor materials, and creates ideal conditions for mold growth in areas that are completely inaccessible without professional intervention.

Signs of a Slab Leak in Your Stockton Home

Whether you’re dealing with a backed-up sink or a main sewer line that’s collapsed, our Stockton team handles the full range:

Any of these signs should be treated as a slab leak until confirmed otherwise.

Plumbing Coupons and Special Offers

We believe every customer deserves high-quality plumbing at a fair price. Take advantage of our current coupons to save instantly on essential services:

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ANY DRAIN CLEANING SERVICE

Coupon must be presented at the time of service and cannot be combined with other offers.

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ANY PLUMBING REPAIR SERVICE

Save on common repairs like leaks, clogs, or fixture replacements.

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ANY WATER HEATER (INSTALLED)

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Main Services We Cover

Professional plumber performing maintenance on a heavy-duty stainless steel garbage disposal unit under a commercial-style white apron sink in a business breakroom or restaurant kitchen.

Plumbing Repairs

Drain & Sewer Services

Water Heaters & Filtrations

Pipes & Inspections

Kitchen & Bathroom Plumbing

Commercial Plumbing

Over 3k Positive Reviews From Our Clients

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E X
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We always request Joe to service our home because he is very professional and knowledgeable! He’s also quick and cleans after his service!
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Vikki Frazier
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As always (we live in an old house) Knights Plumbing are our go to plumbers. Always respectful and in good moods. Today it was Victor’s turn to tackle roots in the pipes. Fast, professional and overall a great guy. He was informative without being pushy about our pipe and tree situation (we do know it’s not great) 5/5 stars. Thanks Victor
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Diana Gillis
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Victor was amazing. Very professional and personable. He explained everything so that I could understand. His workmanship is great and was done in a timely manner. I would trust him with all future work. Thanks Victor...you're the best and I love your friendly personality.
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B. J.
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Victor is an awesome plumber. He has excellent plumbing and customer service skills, and is very efficient and clean. He fixes any plumbing issues I ever had every time the first time. Highly recommend Victor to anyone who expects a professional plumber!
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Elena Sanchez
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Our technician Victor did a fantastic job of running his cable and camera in our sewer line. He unclogged our blockage, fast and efficiently. He was very respectful. I would recommend this company to anyone who’s looking for plumbing services.. Leslie took our phone call and he got someone to us in less than an hour! It wasn’t expensive for the amount of work that was done .If I could give this company more stars, I would.
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Jose Raneses
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Victor was on time and knowledgeable tech and gave me alot of information about tankless water heaters
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Jake Haig
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Michael was the service technician that helped me out and he was very thorough and neat with his work. He made sure his work was done correctly and was very communicative with his process during installation and through their office. Would recommend again.
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J D
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Very pleased with the service. Technician Michael was just awesome. Well versed, polite and helpful. Definitely recommend to all!

How We Locate Slab Leaks

Knights uses professional leak detection equipment to locate slab leaks without unnecessary demolition:

Electronic acoustic detection

Sensitive listening equipment picks up the frequency of water escaping under pressure beneath the slab, allowing us to pinpoint the leak location before any concrete is touched.

Infrared cameras identify temperature anomalies at the floor surface caused by hot water escaping beneath, which maps the leak location and its extent.

Systematic pressure isolation of hot and cold supply lines confirms which line is compromised and narrows the location before physical access.

We locate the leak precisely before recommending a repair approach. You get a fixed price before any work begins.

Slab leak repair service in Stockton CA fixing foundation water leaks

Slab Leak Repair Options

Depending on the leak location, pipe condition, and your home’s layout, there are several repair approaches.

Direct Access Repair

For isolated, well-defined leaks, we open the slab at the precise leak point, repair or replace the damaged section, and restore the concrete. Targeted and cost-effective when the rest of the line is in good condition.

Pipe Rerouting

For leaks in older pipe systems where the surrounding pipe condition warrants concern, rerouting runs a new supply line through walls or attic space, bypassing the slab section entirely. 

Epoxy Pipe Lining

In some cases, internal pipe lining can seal the leak without physical access. It’s appropriate for certain pipe sizes and leak types. Your Stockton plumber will assess whether this is a viable option for your specific situation.

Affordable Plumbing for Everyone

We believe every homeowner and business deserves access to safe, reliable plumbing. That’s why we offer several ways to keep your services affordable and stress-free:

Plumbing Specials & Coupons

Save instantly on everyday plumbing services.

Flexible Financing

Easy payment options so you don’t have to delay important repairs or upgrades.

Royalty Club Membership

Exclusive perks like discounts, inspections, annual water heater flushes for members.

Plumbing Rescue in 4 Easy Steps

Step 1

Call or Schedule Online

Contact us anytime to book service.

Step 2

Upfront Estimate

Get a clear, honest quote before work begins.

Step 3

Expert Service

Our plumbers get the job done right the first time.

Step 4

Guaranteed Results

If you’re not happy, you don’t pay.

Why Choose Our Service?

A skilled plumber wearing white work gloves tightens chrome pipe fittings under a commercial sink using a red adjustable wrench, demonstrating professional installation technique on metal supply lines.
Common signs of a slab leak in Stockton CA such as water stains, cracks, and high water bills

Why Stockton Homes Are High-Risk for Slab Leaks

Stockton’s combination of hard water and expansive clay soils creates ideal conditions for slab leaks. Hard water corrodes copper from the inside, thinning pipe walls until they fail under pressure. Additionally, clay soils beneath Stockton foundations shift seasonally with moisture changes, placing mechanical stress on rigid pipe runs beneath the slab. 

Homes built in the 1950s through 1970s in neighborhoods like Lincoln Village, Miracle Mile, and Del Rio are at the highest risk. Original copper lines in these homes have been under hard water corrosion stress for 50+ years.

We offer complete plumbing solutions for all scenarios.

Fixed Price Before Anything Is Opened

We start by locating the leak. You receive a precise location, a clear explanation of the repair options, and a fixed price before any slab is touched. All slab leak repairs are backed by the Knights Worry-Free Guarantee.

Latest Projects

With more than 30 years of experience, we’re proud to be recognized as the best plumbing contractor for remodeling projects in the Central Valley. From kitchens and bathrooms to full commercial build-outs, we deliver expert plumbing, dependable service, and lasting results that bring your remodeling vision to life.

Latest Projects

Nice Water Heater Swap Stockton, CA

Knights Plumbing and Drian responded to a service request regarding a water heater not producing hot water in Stockton, CA. Upon arrival, the Plumber met with the customer

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Schedule Your Slab Leak Repair in Stockton

Call (209)-319-0579, schedule online, or text us. Knights Plumbing & Drain serves all of Stockton and San Joaquin County. To the Rescue Since 1995.

Knights Plumbing & Drain proudly serves these zip codes in Stockton, CA:

  • 95201–95213
  • 95215, 95219
  • 95267, 95269
  • 95296–95297

Knights Plumbing & Drain 

(209) 319-0579

 

Operation Hours:

 

Sunday       8:30 AM-6 PM

Monday      7 AM-6:30 PM

Tuesday      7 AM-6:30 PM

Wednesday 7 AM-6:30 PM

Thursday     7 AM-6:30 PM

Friday          7 AM-6:30 PM

Saturday      7:30 AM-6 PM

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Stockton CA