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Slab Leak Detection in Sherman Oaks, CA

Leak Detection in Sherman Oaks, CA

ServiStar Plumbing and HVAC finds slab leaks in Sherman Oaks, CA without tearing up your floors using our non-invasive slab leak detection process. We pinpoint the leak first, then open only the small area we need to.

Call (818) 855 1269 for same-day service.

Why Choose ServiStar for Slab Leak Detection

We handle detection, repair, sewer work, and full repipe as one team. What sets us apart:

  • CSLB License #885156
  • 24/7 phone availability
  • Same-day slab leak response
  • Permits filed and insurance paperwork prepared for you
  • Full pricing before any work begins
  • Video footage of the leak detection
Technician using acoustic leak detection equipment for slab leak detection in Sherman Oaks, CA inside a home.

Signs You Have a Slab Leak

Slab leaks mainly present themselves as high water bills, warm floor spots, low water pressure, and the sound of running water when nothing is on.

Warning signs include:

  • A sudden jump in your water bill. The EPA reports household leaks can waste 10,000 gallons a year.
  • Warm or hot spots on the floor due to a leaking hot water line.
  • Low water pressure across every faucet in the home.
  • Sound of running water with every tap and appliance off.
  • Damp carpet, warped hardwood, or cracked tiles.
  • Mildew smell or mold near walls and baseboards.
  • Cracks in your floor, baseboards, or lower walls.
  • Doors and windows that stick or won’t close, meaning the foundation is shifting.
  • Pets sleeping in a new warm spot indicating that the concrete is warming from a hot line below.

How We Detect Slab Leaks

Detection uses four core tools: electronic listening devices, thermal imaging cameras, pressure testing, and video pipe inspection.

Here’s our step-by-step process:

  1. Water meter test: We shut off every water source. If the meter still moves, a leak is confirmed.
  2. Pressure test: We isolate the plumbing and add air or water pressure. A drop confirms an active leak.
  3. Electronic listening: Our technicians use acoustic devices to hear the leak through the concrete.
  4. Thermal imaging: Infrared cameras reveal warm patches where hot water lines are leaking.
  5. Tracer gas: For difficult leaks, we introduce a safe gas into the pipes. Floor sensors detect where it escapes.
  6. Video pipe inspection: For drain-side leaks, a small video camera runs through the pipe to locate the break.
  7. Mark and confirm: We mark the leak location on the floor and review findings with you before any repair begins.


Most Sherman Oaks inspections finish in 2 to 4 hours.

Call (818) 855 1269 for professional slab leak detection

How Accurate Is Non-Invasive Slab Leak Detection?

Non-invasive slab leak detection locates the leak to within a square foot in most homes when we confirm the spot with two or more methods. Single-method detection misses more often. Our technicians run acoustic, thermal, and pressure tests together, then cross-check the readings before marking the floor.

Why Two Methods Beat One

Two independent tools pointing at the same spot drop the error rate close to zero. One tool alone has a higher chance of a false positive. If acoustic says one location and thermal says another, we run tracer gas to break the tie before we cut any concrete.

Non-Invasive Slab Leak Detection Accuracy Tools

  • Acoustic listening devices: These pick up the sound of pressurized water escaping the pipe. On a standard 4-inch concrete slab, a trained technician locates the leak within 6 inches of the break. Thicker slabs and hillside foundations widen that range to 12 to 18 inches, still small enough to open one or two floor tiles.
  • Thermal imaging cameras: Infrared cameras read heat patterns through the floor. They find hot-water leaks within 2 to 3 feet on their own. Cold-water leaks show up only when the surrounding ground is warm enough for the cool spot to contrast. This tool works best paired with acoustic confirmation.
  • Tracer gas: When acoustic and thermal disagree, or when pipe insulation muffles the sound, we introduce a safe hydrogen-nitrogen mix into the line. The gas escapes at the break and rises through the concrete. Handheld sensors pinpoint the exit point to within inches.
  • Video pipe inspection: For drain-side leaks, a small camera runs through the pipe itself. The technician sees the break on a monitor and reads the distance counter to know exactly how far in it is. Accuracy is exact, not estimated.
  • Pressure decay testing: Isolating a section of the plumbing and adding pressure confirms a leak exists in that section. It does not locate the leak on its own. It tells us which line to focus the other tools on.


Call (818) 855 1269 for non-invasive slab leak detection

What Causes Slab Leaks in Sherman Oaks Homes?

Slab leaks in Sherman Oaks mainly come from old pipes, hard water, ground movement, and excess water pressure.

  • Old galvanized or copper pipes: Homes built between 1950 and 1975, a large share of Sherman Oaks, still run on their original pipes. After 50 to 70 years, those pipes rust from the inside, causing leaks.
  • Hard water from LADWP: In summer, the Los Angeles Department of Water and Power draws more from the Colorado River Aqueduct and State Water Project. That water contains higher levels of calcium and magnesium, which corrode pipes faster. A water filtration system slows this down.
  • Small earthquakes: The San Fernando Valley experiences minor seismic activity year-round. Even small tremors loosen joints under the slab.
  • Ground shifting: Clay-heavy soil in parts of the Valley expands when wet and shrinks when dry, stressing buried pipes.
  • High water pressure: Pressure above 80 psi, which is the Uniform Plumbing Code limit, strains pipes and joints. A pressure regulator keeps pressure within a safe range.
  • Pipe abrasion: Over decades, pipes rub against the concrete slab and wear through, causing leaks.


Call (818) 855 1269 to book our services

How Much Does Slab Leak Detection Cost in Sherman Oaks?

Slab leak detection in Sherman Oaks costs $150 to $600. Single-story flatland homes fall at the lower end. Complex hillside layouts and multi-story homes cost more.

Estimate repair pricing by method:

  • Spot repair: $500 to $2,000
  • Pipe rerouting: $1,500 to $4,000
  • Trenchless pipe lining: $1,000 to $3,500
  • Full repipe: $4,000 to $15,000


The average Sherman Oaks homeowner pays around $2,280 for detection and repair combined, and every job begins with a written estimate.

Signs Your Sherman Oaks Home Has a Hidden Water Leak

You may have a hidden water leak when signs like a warm spot on the floor or a musty smell show up in your home. Here are some signs to look out for.

  • Unexplained water bill increase. Your bill jumps, but nothing about your water use has changed. That points to a supply line leak wasting water day and night. Our team runs a meter test and traces the loss with electronic listening equipment.
  • Sound of running water when every tap is off. A steady hissing or trickle when all taps are closed points to a pressurized leak somewhere in the line. We locate it with acoustic sensors so the fix goes to the exact spot.
  • Warm spot on the floor. A patch of floor that feels warm is a hot-water slab leak. The pipe is leaking under the concrete. Our team uses thermal imaging to map the leak’s path, then opens the smallest possible area for the repair.
  • Musty smell or damp drywall. A musty odor or damp patch on a wall or ceiling means water is escaping into wood, drywall, or insulation. We find the source and fix it before mold takes hold.
  • Low water pressure at the tap. Pressure that has quietly dropped over time can mean a hidden leak upstream is stealing supply. We test the pressure at multiple points and trace the loss to the leak.
  • Cracks in the slab or foundation. New cracks or slight heaving in a concrete slab can be the sign of a slow leak washing out soil beneath it. Our team checks for water before the crack gets worse.
  • Water meter moving with no taps on. Shut off every fixture in the house. If the meter still moves, water is leaking somewhere. Our team uses pressure testing to isolate the section of pipe.


Call (818) 855-1269.

Technician testing an underground plumbing line with electronic leak detection equipment near a home's foundation.

Does Homeowners Insurance Cover Slab Leaks in California?

California homeowners insurance often covers sudden, accidental slab leaks. Gradual leaks from wear and tear are usually excluded.

What most policies do and do not cover:

  • Often covered: water damage from a burst pipe.
  • Often covered: floor removal and replacement.
  • Sometimes covered: the cost to locate the leak, called tear-out coverage.
  • Rarely covered: the pipe repair itself.
  • Not covered: damage from a slow leak ignored for months.


What you require before filing for homeowners insurance:

  1. Photographs of the damage and any water bill spikes.
  2. A written report from a licensed plumber.
  3. Confirm your deductible. Small repairs may cost less.


At ServiStar Plumbing and HVAC, we provide the documentation your insurer requires.

Call (818) 855 1269  for slab leak detection and repair

What Is a Slab Leak?

A slab leak is a water or drain pipe that has broken beneath your home’s concrete foundation. Most California homes sit on a concrete slab 4 to 8 inches thick, with plumbing running through or beneath it. When one of those pipes cracks or corrodes, water escapes into the ground under your floor.

There are two kinds of slab leaks:

  • Pressure-side leaks, which are most common. They affect hot or cold supply lines. Most common.
  • Drain-side leaks. These are less common but require different repair methods. They affect sewer or waste lines.


The type determines both detection method and repair cost.

Call (818) 855 1269 for slab leak detection

Contact us for Slab Leak Detection in Sherman Oaks

Every day a slab leak runs, water waste climbs, foundation damage worsens, and insurance claims get harder to win. The sooner we find it, the smaller the repair and the cleaner the claim.

Any slab repair that cuts concrete or reroutes pipes requires a permit from the Los Angeles Department of Building and Safety (LADBS). We file the permit as part of the job, so the repair meets the California Plumbing Code.

Active leaks get same-day service. Bring your latest water bill and any photos of damage to speed up the inspection. No work begins until you approve the estimate.

Contact ServiStar Plumbing and HVAC or call (818) 855 1269 to book slab leak detection in Sherman Oaks.

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ServiStar Plumbing and HVAC

13351 Riverside Dr Ste 414, Sherman Oaks, CA 91423

United States

(818) 855-1269

Open 24 Hours

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Frequently Asked Questions

Weeks, months, or in slow-drip cases, years. Small leaks may lose only a few gallons per week, well below what triggers notice on a monthly water bill.

Yes. Left unfixed, water erodes the soil under your foundation and can cause structural settling. Even a small leak wastes hundreds of gallons weekly.

Find your main shutoff valve, usually near the front hose bib, in a garage wall, or at the street, and turn the handle clockwise until it stops. This isolates the leak until we arrive.

You can confirm one exists, but not locate it. Shut off every water source and watch your meter for 30 minutes. If it moves, a hidden leak is running.

A slab leak is in a pipe beneath the concrete foundation. A regular leak is in a pipe you can see and reach. Slab leaks cost more to fix because of the concrete work involved.

A repaired leak stays fixed, but old pipes may fail elsewhere. If a home has had two or more slab leaks, the pipe system itself is failing, not just one section.

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