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Acoustic and thermal leak location under concrete, done right
Slab Leak Detection Whittier CA Stops Hidden Water Damage
Slab Leak Detection Whittier CA pinpoints water escaping beneath your foundation before it warps floors or inflates your bill. We use acoustic listening devices and thermal imaging cameras to find the break, then handle slab leak repair in Whittier the same visit when conditions allow. If your water bill jumped and you hear running under the floor, call (562) 271-1350.
Prepared local crewClear options firstFinal testing and walkthrough
Clear scope before work
Review the approach and price before deciding.
Prepared, clean crews
Equipped vehicles and respectful cleanup.
Local accountability
Neighbors serving neighbors with follow-through.
What is included
What Our Slab Leak Detection Includes
Every detection visit covers the full diagnostic sequence, not just a quick listen. You get a confirmed location, a marked spot, and a written repair recommendation. Repair work is quoted separately once you choose between a direct cut and a reroute.
Full Pressure Test
We isolate the hot and cold sides and watch a pressure gauge and flow meter for drop-off. This tells us whether the leak is active, which line it is on, and roughly how much water you are losing per hour.
Acoustic and Thermal Sweep
Ground microphones, acoustic listening devices, and a thermal imaging camera cover the whole slab. We cross-check each hit with a moisture meter so you get a confirmed location, not a best guess.
Marked Leak Location
We paint the spot on your floor and photograph it. You see exactly where the access cut will be before anyone starts cutting, and you keep the photo for your records or your insurance claim.
Written Repair Options
You get two clear choices: direct access cut and patch, or reroute the line to avoid the slab. Each comes with a price and a warranty term. No pressure, no same-day-only discount games.
Post-Repair Pressure Test
After any repair we repressurize the line and hold it at 80 psi. If it holds, you get the reading on your invoice. If it does not, we keep working. That test is your proof the fix is real.
PLAN
Request a service estimate
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Service overview
What Slab Leak Detection Whittier CA Actually Involves
Slab Leak Detection Whittier CA is a diagnostic plumbing service that locates water escaping from supply or drain lines running beneath a concrete foundation. We pressurize the system, watch a pressure gauge for drop-off, then sweep the slab with acoustic listening devices and thermal imaging cameras to hear and see the leak. A flow meter confirms whether the loss is on the hot or cold side. Most homes we inspect in Whittier were built between the 1950s and 1980s, when copper pipe under slab was standard, and copper corrodes from the outside in after decades in Southern California soil.
You need this service when the signs stop being subtle. A water bill that doubles with no change in habits, a hot spot on the floor, the sound of running water with every fixture off, or cracks spreading across tile. Whittier slab leak detection saves you from the alternative: jackhammering blindly and hoping. We also check for pool leaks and water line leaks at the same visit, because a slab leak and a leaking pool line can produce identical symptoms on your meter.
- Pinpoint Accuracy — We mark the leak within inches using ground microphones and electromagnetic pipe locators, so the concrete cut is small. One recent Whittier job needed a 2-foot by 2-foot opening instead of the 10-foot trench another contractor quoted. Less concrete, less dust, faster patch.
- Same-Day Repair Options — When you need same-day slab leak repair Whittier California, we carry copper, PEX tubing, and pipe fittings on every truck. If the line is accessible and the leak is confirmed, we often reroute or repair the same day. You are not waiting three days with water running under your floor.
- Lower Water Bills — A slab leak can waste 10,000 to 30,000 gallons a month, which shows up fast on a Whittier water bill. Once we stop the loss, most customers see their usage drop back to normal on the next billing cycle. We show you the before-and-after meter reading so you can verify it yourself.
- Foundation Protection — Water under a slab softens soil, shifts support, and cracks tile, drywall, and door frames. Stopping the leak early protects the foundation itself. We also check for root intrusion and pipe corrosion while we are under there, because a second weak spot two feet away is common in older Whittier homes.
- We Mark Before We Cut — Every slab leak is confirmed by at least two methods before we cut concrete. Acoustic plus thermal, or acoustic plus pressure drop. That double-check is why our access holes average 2 square feet instead of 10. Less mess in your living room, faster patch, lower repair bill.
- Straight Pricing, No Surprises — You get the detection fee and the repair range before we start. No hourly meter running while we scratch our heads. If we cannot find the leak, you do not pay for the detection. That is the deal, and we put it in writing on the invoice.
- 24/7 Emergency Response — Water does not wait for business hours. When you need 24/7 slab leak repair in Whittier California, we answer the phone at 2 a.m. and roll a truck. We have shut down active slab leaks on holidays and during heat waves when the whole neighborhood is running irrigation.
- Repairs That Last — We use copper pipe, PEX tubing, and CPVC pipe with proper fittings and pipe sealant, never a patch-and-pray clamp. Rerouted lines are warrantied, and we pressure-test at 80 psi before closing the wall or patching the slab. You get the test reading on your invoice.
The service timeline
Our Slab Leak Detection Process
Phone Triage
You call (562) 271-1350 and describe what you are seeing: high bill, hot floor spot, running sound, or a wet patch. We ask about your meter, your water heater, and whether the sound is constant. Two minutes on the phone usually tells us whether it is a slab leak or a pool leak, and we book the visit.
Pressure Test
On arrival we shut off fixtures and pressurize the system with a pressure gauge. A steady drop confirms an active leak. We isolate the hot and cold sides with valves and a flow meter to determine which line is losing water. This step takes 20 to 30 minutes and costs you nothing extra.
Acoustic Sweep
We walk the slab with acoustic listening devices and a ground microphone, headphones on, listening for the hiss of pressurized water escaping a pinhole. We mark each hit with acoustic putty so the sound does not bleed between locations. This is where experience matters most, and it is why we get called after other companies miss.
Thermal Confirmation
A thermal imaging camera shows the temperature signature of a hot-water leak as a bright streak on the slab. We cross-check the acoustic hit against the thermal image and a moisture meter reading. When all three agree, we mark the spot with paint. You see the evidence on screen before we touch a hammer.
Repair Plan
We give you the repair options in plain language: direct access cut and patch, or reroute the line through the attic or exterior wall to avoid the slab entirely. You get the price for each. Most Whittier customers choose the reroute when the pipe is old copper, because it eliminates the whole failing section.
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Tools and Methods We Use
Acoustic Listening Devices and Ground Microphones
Pick up the hiss of pressurized water escaping a pinhole under concrete. We mark each hit with acoustic putty so readings stay clean between locations.
Thermal Imaging Cameras
Show hot-water leaks as a bright streak on the slab and reveal moisture patterns behind walls. You see the image on screen before we cut anything.
Electromagnetic Pipe Locators
Trace the exact path of copper, PEX, and PVC lines under the slab so we know where to listen and where to cut.
Pressure Gauges and Flow Meters
Confirm an active leak and tell us whether the loss is on the hot or cold side. A steady pressure drop is the first hard evidence.
Video Pipe Inspection Cameras
Used on drain and sewer lines to rule out a broken sewer under the slab when the symptoms point that direction.
Moisture Meters and Tracer Gas Detectors
Moisture meters confirm elevated readings along baseboards. Tracer gas detectors help on low-pressure lines where acoustics alone are not enough.
Pressure Isolation Testing
We valve off the hot and cold sides separately and watch a gauge. A drop on one side tells us which line is leaking and roughly how fast. This is the first step on every job and it takes about 20 minutes.
Acoustic Correlation
Two sensors placed on the slab pick up the same leak sound at slightly different times. The equipment calculates the source between them. We use Sewerin and Gutermann platforms and confirm each result with a second method.
Thermal Cross-Check
A thermal imaging camera shows the temperature signature of the leak. When the acoustic hit and the thermal image agree, we mark the spot. Two independent methods agreeing is our standard before any concrete is cut.
Line Rerouting
Instead of cutting the slab, we run a new line through the attic or an exterior wall and abandon the failed section. This is code-correct with a permit and it eliminates the corroded pipe entirely. Most Whittier hot-water leaks qualify.
Post-Repair Pressure Verification
After the repair we repressurize the line and hold it at 80 psi for a set period. If it holds, the job is done and you get the reading on your invoice. If it drops, we keep working.
Where this service helps
When to Call for Slab Leak Detection
You are selling your Whittier home and the buyer's inspector flagged elevated moisture near a baseboard.
We run a full non-invasive detection with thermal imaging and a moisture meter, then document the findings in writing. If there is no active leak, you get a clean report to hand the buyer. If there is one, you get a repair quote before closing. You go into escrow with a documented answer instead of a price reduction demand. Most detections are completed in under two hours.
Your water bill spiked after a hot summer of running the irrigation and pool fill.
We isolate the pool lines, irrigation, and slab system one at a time with pressure gauges and flow meters. That tells us whether the loss is under the slab or out in the yard before anyone cuts concrete. You pay to fix the line that is actually leaking. We have saved Whittier customers from unnecessary slab cuts more than once this way.
You hear water running at 2 a.m. and the floor near the hallway feels warm.
We treat it as an emergency, shut down the hot-water side to stop the loss, and return with the full acoustic and thermal kit. If you need 24/7 slab leak repair in Whittier California, we can often complete the reroute the same night. The water stops, the floor dries, and you are not watching your foundation soak for two days waiting on a callback.
A previous plumber cut a hole, found nothing, and patched it back up.
We re-sweep the entire slab with acoustic and thermal equipment instead of trusting the old cut. Copper lines often fail in a different spot than the first guess, especially where the pipe bends under a footing. You get a confirmed location and a repair that actually addresses the leak. We document the new spot with photos before cutting.
Local execution
How Slab Leak Detection Runs in Whittier
Whittier sits on a mix of older clay soils and expansive ground, and most of the housing stock dates from the 1950s through the 1980s. That means copper pipe under slab, and copper that has been sitting in Southern California soil for decades. We see corrosion pitting on the outside of the pipe, not the inside, which is why a leak can appear with no warning and no drop in water quality. The climate matters too. After a dry summer, the soil shrinks and shifts, and that movement stresses the pipe at every bend and fitting. When the fall rains arrive, the soil swells again and the crack opens further. If you are searching for how to find a slab leak under concrete in Whittier CA, the answer is almost always acoustic first, thermal second, and a pressure test to confirm. We also check for root intrusion on the sewer side, because a cracked sewer under a slab can mimic a supply leak with odors and slow drains. Our trucks carry copper, PEX tubing, and CPVC pipe so most repairs are finished the same visit. We work Los Angeles County every day and know which neighborhoods have post-tension slabs, which need a different cutting approach, and which older homes have already been partially rerouted.
Uptown Whittier
Older homes with original copper under slab and mature street trees. Root intrusion on sewer laterals is common here, so we always run a camera on drain-side symptoms.
East Whittier
Mid-century tract homes with long hot-water runs under the slab. Rerouting through the attic is usually straightforward and avoids cutting the floor.
Friendly Hills
Larger lots with longer supply runs and more irrigation. We isolate pool and yard lines from the slab system before diagnosing, because the symptoms overlap.
West Whittier
Properties closer to the river with soil that stays wetter longer. Corrosion on the outside of copper pipe shows up faster here, and we see more pinhole leaks.
Expansive clay soil that shrinks in summer and swells after rain
The movement stresses pipe at bends and fittings, which is where most slab leaks start. We pay close attention to those points during the acoustic sweep.
Copper pipe installed between the 1950s and 1980s
Decades of soil contact corrode the pipe from the outside. We plan for a reroute on older lines because a second pinhole nearby is common.
Post-tension slabs in some newer Whittier builds
Cutting a post-tension slab requires knowing where the cables run. We locate them first and reroute the line instead of cutting whenever possible.
Before and after
What a successful service visit changes.
High Bill Traced to Hallway Slab Leak
Before
A Whittier homeowner's water bill jumped from $70 to $210 in one cycle. The meter spun with every fixture off, and there was a faint running sound near the hallway. Two prior plumbers had guessed at the location without equipment.
After
We pressure-tested, swept the slab with acoustics, and confirmed with thermal imaging. The leak was under the hallway, two feet from where the previous guesses pointed. We rerouted the hot line through the attic and the next bill came back at $74.
Maintenance: Keep an eye on the meter once a month with everything off. If it moves, call us before the bill climbs. The rerouted line is warrantied.
Warm Floor Spot Fixed Without Cutting Tile
Before
A Friendly Hills homeowner noticed a warm spot on the bathroom floor and the water heater running constantly. The tile was custom and the homeowner did not want it cut. A previous contractor quoted a full bathroom floor demolition.
After
Thermal imaging showed the hot-water leak under the vanity. We rerouted the line through the wall and abandoned the failed copper section. No tile was cut, the water heater stopped running, and the repair was pressure-tested at 80 psi.
Maintenance: Flush the water heater annually and watch for any new warm spots. Rerouted PEX lines do not corrode in soil.
Pool Leak Ruled Out, Slab Leak Found
Before
A West Whittier property was losing water and the homeowner assumed the pool was the culprit. The pool had been re-plastered the year before. The water bill was up $90 a month and the pool level was holding steady.
After
We isolated the pool lines, irrigation, and slab system one at a time. The pool held pressure. The slab did not. We found a cold-water leak under the kitchen, repaired it, and the bill dropped back to normal within one cycle.
Maintenance: Mark your pool level weekly during summer. If it holds but the bill climbs, the loss is in the house, not the pool.
Problems we solve
Slab Leak Problems We Solve in Whittier
A slab leak is rarely just a leak. It is a high bill, a damaged floor, and a foundation question all at once. Here is what we see most often and how we handle it.
Water bill doubled with no change in usage
You are paying for water that is soaking into the soil under your foundation, and the loss can hit 30,000 gallons a month before you notice a wet spot. We pressure-test the system, isolate the hot and cold sides, and sweep the slab with acoustic gear. Once we mark the leak, we repair or reroute the line and show you the meter reading before and after so you can confirm the loss has stopped.
Warm spot on the floor or hot water running constantly
A hot-water slab leak heats the concrete from below, which warps hardwood, loosens tile, and keeps your water heater running around the clock. Thermal imaging cameras make hot-water leaks easy to see as a bright streak on the slab. We confirm with acoustics, then reroute the hot line through the attic when possible, which avoids cutting the floor entirely in most Whittier homes.
Sound of running water when everything is off
That hiss is pressurized water escaping a pinhole in copper pipe, and it will not stop on its own. Left alone, it erodes soil and can crack the slab. Ground microphones and acoustic listening devices pinpoint the sound to within inches. We mark it with acoustic putty, confirm with a pressure drop, and give you a repair plan the same visit.
Cracks appearing in tile or drywall
Shifting soil under a leaking slab moves the foundation, and the cracks show up inside your home long before you see water on the floor. We find and stop the leak first, because patching cracks over an active leak is wasted money. Once the line is repaired and tested, the soil stops moving and the cosmetic repairs hold.
Proof behind the promise
Licensed, Insured, and Accountable
Technical expertise
Local Experience You Can Verify
Our technicians hold a California Contractor License (C-36 Plumbing) and carry IAPMO certification, with ongoing training on Sewerin and Gutermann acoustic equipment. We work Whittier, Los Angeles County, and the surrounding cities every week, so we know the pipe materials, soil conditions, and slab construction common to each neighborhood. We are licensed, insured, and bonded, and we test every repair before we leave. If the line holds pressure, you get the paperwork. If it does not, we stay until it does.
- California Contractor License (C-36 Plumbing) held by the qualifying individual on staff
- IAPMO certification and continuing education on acoustic and thermal leak location
- Trained on Sewerin, Gutermann, and SubSurface Instruments acoustic platforms
- OSHA safety certification for concrete cutting and confined-space work
- EPA WaterSense certification for water-loss diagnostics and efficiency audits
Customer stories
What Whittier Customers Say
Maria G.Homeowner, East Whittier
My water bill went from $70 to $210 in one cycle and I could hear water running at night. They came out, pressure-tested, and found the leak under the hallway with the acoustic gear in about an hour. Cut a small square, rerouted the hot line through the attic, and my next bill was back to normal. No drama, no upsell.
Dave R.Homeowner, Friendly Hills
Two other plumbers told me they would have to jackhammer half the living room. These guys marked the spot with thermal imaging and it was two feet off from where the others guessed. Repair took one day and they pressure-tested it in front of me. Worth every penny.
Anh T.Property Manager, Uptown Whittier
I manage four rentals near the 90601 and 90603 ZIPs, and I have used them three times now. They answer the phone at night, they show up when they say, and they send photos of the leak location before cutting. That documentation keeps my owners calm. Straight shooters.
How much does slab leak detection cost in Whittier CA?
Most slab leak detection jobs in Whittier run $180 to $450 depending on slab size and access. That covers the pressure test, acoustic sweep, thermal imaging, and a marked location. If we cannot find the leak, the detection fee is waived. Repair is quoted separately once we know whether you want a direct cut or a reroute.
Who fixes slab leaks in Whittier California?
We do. Whittier Water Leak Detection Pros handles both the detection and the repair, so you are not paying two companies and waiting for one to hand off to the other. We hold a California Contractor License (C-36 Plumbing), carry repair materials on every truck, and pressure-test the line before we leave. Call (562) 271-1350.
What are signs of a slab leak in Whittier CA?
The four most common signs are a water bill that jumps 30 percent or more, a warm spot on the floor, the sound of running water when everything is off, and cracks in tile or drywall. A moisture meter reading high along a baseboard is another clue. Any two of these together justify a detection visit.
Can you repair a slab leak without breaking concrete in Whittier?
Yes, in many cases. We reroute the line through the attic or an exterior wall and abandon the failed section under the slab. That means no jackhammer inside your home. It works best on hot-water lines and on homes where the ceiling or wall access is straightforward. We quote both options so you can compare.
Frequently asked questions
Frequently Asked Questions
Not seeing your question? Our local team can help you understand urgency, scheduling and what to expect.
Ask the local teamRelated services
Related Services
Pool Leak Detection
A pool leak and a slab leak look identical on your water meter. We pressure-test the pool plumbing separately from the house lines so you are not paying to cut concrete when the loss is actually in a return line or skimmer.
View service
Water Line Leak Detection
The main water line from the meter to the house is a common leak point in older Whittier properties. We isolate it from the slab system during the pressure test, so a water line leak never gets misdiagnosed as a slab leak.
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Water Main Leak Detection
Larger water main leaks on the property side can undermine soil under driveways and walkways. We use the same acoustic and tracer gas methods to locate them, then coordinate the repair so your slab detection results stay accurate.
View serviceUnderground Water Leak Detection
Irrigation lines, pool fills, and yard lines all run underground and can mimic a slab leak. We map and test them alongside the slab so the leak you pay to fix is the leak that is actually losing water.
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Contact the local team
Contact Whittier Water Leak Detection Pros
Call (562) 271-1350 and you will reach a Whittier-based leak specialist, not a call center. We answer 24/7 for emergency water leak detection and schedule same-day visits for most residential calls. Tell us what you are seeing, and we will tell you what it likely is and when we can be there.