Leak Detection Services for Hidden Water Leaks
A hidden water leak wastes water, damages building materials, and costs more the longer it runs. PowerRoute Electric & Plumbing locates leaks in supply lines, drain lines, walls, ceilings, underground piping, and beneath concrete slabs.
Accurate leak detection comes first. We narrow down which part of the plumbing system is leaking before anyone opens a wall or breaks concrete. For other problems around your property, explore our complete plumbing services.
Same-day service is available when scheduling allows.
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Tell us what you are seeing. We will schedule leak detection and give you a no obligation estimate for the recommended repair.
Since 2014
Serving LA County
Licensed
Plumbing & Electrical
Same-Day
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2-Year
Labor Warranty
Water Leak Detection for Leaks You Cannot See
Most leaks show up as a symptom long before anyone finds the source. A rising water bill, a warm spot on the floor, or a stain on the ceiling tells you something is wrong. It does not tell you where.
PowerRoute provides leak detection for:
- Pressurized water supply lines
- Slab leaks beneath concrete foundations
- Leaks inside walls and ceilings
- Underground water line leaks
- Pool and spa line leaks
- Fixture and supply line leaks
- Water heater and connection leaks
- Drain, waste, and sewer line leaks
- Leaks that returned after a previous repair
- Residential and commercial plumbing systems
The goal is a specific location and a clear cause, not a guess. For other plumbing problems throughout your property, explore our complete plumbing services.
Signs You May Have a Hidden Water Leak
Hidden leaks announce themselves indirectly. The symptoms below point to several different plumbing problems, so proper diagnosis matters before any destructive work begins.
Water Bill and Meter Signs
Your water meter is the simplest test available. Shut off every fixture and appliance that uses water, then watch the meter. Movement with everything off points to an active leak on the line.
Common signs include:
- Unexplained increase in the water bill
- Water meter moving with all fixtures off
- Higher usage with no change in habits
- Unexplained loss of water pressure
- A water heater that runs constantly
- A utility notice about high usage
Signs Inside the Home
Water travels along framing, piping, and flooring before it surfaces. A stain on a ceiling often sits several feet from the actual break.
Common signs include:
- Warm or unusually damp flooring
- Musty odors in one area
- Mold or mildew growth
- Water stains on walls or ceilings
- Bubbling, blistering, or peeling paint
- Sounds of running or dripping water
- Warped flooring or loose tile
Signs Around the Property
Supply lines run under driveways, walkways, and landscaping. An underground leak often shows at the surface before anything appears indoors.
Warning signs include:
- Wet or soggy areas in the yard
- Unusually green patches of grass
- Water pooling near the foundation
- Sunken or eroded soil
- New cracks in a slab or foundation
- Water surfacing on a driveway or walkway
If water is actively entering the building or the damage is spreading, treat it as urgent and contact our emergency plumbing services.
Leak Detection vs Leak Repair
These are two different jobs. Detection answers where the leak is and what caused it. Repair answers how to correct the damaged plumbing. Doing the first one properly makes the second one smaller.
Leak Detection
Detection isolates the problem before anyone opens a wall or cuts concrete. It answers the diagnostic questions:
- Confirming an active leak exists
- Identifying the affected line
- Pinpointing the location
- Determining the likely cause
- Estimating the access a repair needs
Narrowing the location first reduces exploratory demolition. Some access work is still required to reach a buried or embedded pipe, but the opening stays as small as the repair allows.
Leak Repair
Once the source is confirmed, the repair plan depends on the pipe material, the location, and the condition of the surrounding system.
- Spot repair at the failure point
- Rerouting a damaged section
- Replacing a run of corroded pipe
- Whole-house repiping for widespread failure
- Fixture and supply line replacement
Repeated failures across a property usually point to the piping itself rather than one bad joint. In that case, pipe repair and repiping lasts longer than another spot fix.
Types of Leaks We Diagnose
The detection method depends on where the leak sits and which part of the system is involved. These are the situations we get called out for most.
01
Slab leaks under concrete
02
Leaks inside interior walls
03
Ceiling and upper floor leaks
04
Underground water line leaks
05
Fixture and supply line leaks
06
Water heater and connection leaks
07
Drain, waste, and sewer leaks
08
Commercial plumbing leaks
Leaks beneath a concrete slab behave differently from everything else on this list, so they have a page of their own covering slab leak detection and repair. If the symptom is slow drainage rather than escaping water, start with drain cleaning instead.
Leak Detection Methods We Use
No single technology finds every leak. The right method depends on the suspected location, the pipe material, and whether the line is pressurized. Most visits use more than one.
Listening equipment picks up the sound a pressurized leak makes as water escapes the pipe. It works well on supply lines running under slabs, soil, and finished surfaces.
Infrared imaging reads temperature differences across a surface. It helps locate hot water leaks and damp areas behind walls, ceilings, and flooring.
Isolating a section of the plumbing system and watching for pressure loss confirms whether a line is leaking and narrows the search to a specific run.
A camera sent through a drain, sewer, or accessible line shows cracks, separated joints, and root intrusion that let water escape.
Shutting off zones one at a time and watching the meter separates a supply line leak from a drain problem and shows which part of the system to open first.
Slab Leaks and Leaks Behind Walls
These two account for most of the hidden leaks we find inside a building. They present differently and they are diagnosed differently.
Slab Leak Detection
A slab leak is a break in a water line running beneath the concrete foundation. Detection relies on acoustic listening, thermal imaging, and pressure testing rather than opening concrete.
Common indicators:
- A warm spot on the floor
- Running water sounds with fixtures off
- Unexplained moisture at the slab edge
- New cracks in flooring or foundation
- A water heater running more than usual
- A sharp jump in the water bill
Wall and Ceiling Leak Detection
Leaks inside walls and ceilings come from supply lines, drain lines, or fittings behind finished surfaces. Thermal imaging and acoustic equipment narrow the location before drywall comes out.
Common indicators:
- Stains spreading across drywall
- Bubbling or peeling paint
- Soft or crumbling drywall
- A musty odor in one room
- Mold along a baseboard or corner
- Dripping sounds inside a wall
Detecting leaks beneath a concrete slab takes a different toolset than a wall leak, and the repair options differ too. Our page on professional slab leak detection covers spot repair, rerouting, and repiping in detail. For pricing on each method, read our slab leak repair cost in Los Angeles breakdown. For homes in Van Nuys and the San Fernando Valley, see whole house repiping for PEX and copper options. If a drain or sewer line turns out to be the source, see sewer line repair and replacement.
Underground, Pool, and Commercial Leak Detection
Underground leak detection covers the buried service line between the meter and the building, plus any lines running under driveways, patios, and landscaping. Symptoms show up as soggy ground, unusually green patches, water surfacing on hard paving, or a meter that keeps moving with the building shut off. Acoustic equipment and line isolation narrow the location before anyone digs.
Pool and spa lines leak underground the same way a service line does. A pool losing more water than normal evaporation, a wet patch near the equipment pad, or soft ground along the decking points to a break in the suction, return, or fill line rather than the shell. We pressure test each line, isolate the skimmer and main drain runs, and locate the break before any concrete or decking comes up. The symptoms overlap with a buried water line leak, so isolation testing separates the two before anyone digs.
Commercial properties add scale and access problems. Multi-unit buildings, restaurants, and offices run longer pipe through occupied space, which makes an accurate location worth more. See our commercial leak detection page for how we work inside occupied buildings, or our commercial plumbing services for the repair work that follows.
When a buried line has failed in more than one spot, replacing the run usually costs less over time than repeated patches. That is where pipe repair and repiping comes in.
What Does Leak Detection Cost?
Leak detection is priced by the work required to find the leak, not by one flat number that fits every property. Cost tracks how hard the leak is to reach and how many areas need testing.
Accessible line or under concrete
Slab and underground leaks take more work to isolate
More fixtures, longer pipe runs
Larger systems mean more zones to isolate and test
Acoustic, thermal, pressure, or camera
Often more than one method on the same visit
Pricing depends on:
- Suspected leak location
- How accessible the piping is
- Size of the property
- Complexity of the plumbing system
- Number of areas requiring testing
- Detection technology required
- Whether additional diagnostic work is needed
Ask whether the diagnostic charge is credited toward the repair, and get the answer in writing before work begins. Policies differ between companies. PowerRoute quotes the detection work before it starts and provides a free, no obligation estimate for the recommended repair once the leak is located.
Can Leak Detection Help With an Insurance Claim?
Insurers decide coverage, not plumbers. What a detection visit gives you is documentation to hand them.
Depending on the situation, that record can include:
- The suspected source of the leak
- Diagnostic findings and the methods used
- Photos of the affected area where appropriate
- Recommended repairs
- Details useful when you speak with your insurance provider
Coverage depends on your policy language and the circumstances of the loss. Many policies treat a sudden pipe failure differently from long term seepage. Ask your insurer what documentation they need before repairs begin, then tell us what to include.
Our Leak Detection Process
1. Discuss the Symptoms
We start with what you noticed and when. Bill history, meter behavior, sounds, stains, and damp areas all narrow the search.
2. Inspect the Affected Areas
We check fixtures, visible piping, water heater connections, and every area showing symptoms.
3. Narrow Down the System
Isolation and meter testing separate a supply line problem from a drain or sewer problem.
4. Apply the Right Detection Method
Acoustic listening, thermal imaging, pressure testing, or camera inspection, matched to the suspected location.
5. Pinpoint and Explain the Findings
We show you where the leak is, what caused it, and how much access the repair needs.
6. Recommend Repairs and Document
You get repair options, an estimate, and written documentation of the findings for your records or your insurer.
When a Leak Becomes an Emergency
Some leaks wait for an appointment. These do not:
- Active water intrusion into living or work space
- Water damage spreading by the hour
- Water appearing through a wall or ceiling
- A sudden, significant loss of water pressure
- A suspected main supply line failure
- Water near electrical panels, outlets, or fixtures
Shut off the affected fixture at its stop valve. If the source is unclear or the water is not slowing, shut off the main water supply to the property when it is safe to reach. Keep people away from standing water near anything electrical.
Then call PowerRoute at (323) 616-2829. Our emergency plumbing services run 24/7, and same-day leak detection is available when scheduling allows.
Why Choose PowerRoute for Leak Detection
Diagnosis Before Demolition
We locate the leak first so the opening matches the repair instead of the search.
Multiple Detection Methods
Acoustic listening, thermal imaging, pressure testing, and camera inspection, matched to the suspected location.
Dual-Licensed Team
Active California plumbing and electrical licenses, which matters when water and wiring share a wall.
Same-Day Availability
Same-day leak detection appointments are available when scheduling allows.
Serving Los Angeles County
We serve Los Angeles County and the San Fernando Valley. Get in contact with us or check the list of communities we cover.
- Studio City
- Encino
- Van Nuys
- North Hollywood
- Burbank
- Glendale
- Panorama City
- Tujunga
- Sunland
- + More Cities Throughout LA County
- Montrose
- Altadena
- Pasadena
- Highland Park
Schedule Leak Detection
A leak that keeps coming back usually means the source was never found. If your bill is climbing, your meter moves with everything off, or a stain keeps growing, get it located before it takes out drywall, flooring, or framing.
Explore our complete plumbing services or contact PowerRoute to schedule leak detection.
Why Property Owners Choose PowerRoute Electric & Plumbing
Licensed and Experienced Plumbers
Certified professionals with hands-on experience diagnosing complex residential and commercial plumbing systems.
Honest Recommendations Without Unnecessary Upselling
Straightforward advice based on what the diagnostics show, so you pay for the work your property actually needs.
High Quality Workmanship
Careful attention to detail on the detection and on the repair that follows it.
Code Compliant Repairs
Every repair follows current California plumbing codes and local safety regulations.
Clean and Organized Job Sites
We protect floors, keep the workspace tidy, and clean up thoroughly before we leave.
Reliable Scheduling
Prompt arrivals, clear communication, and dependable service windows.
Don't Take It From Us!
Hear It From Our Happy Customers
See why homeowners and property managers across Los Angeles County choose PowerRoute Electric & Plumbing for accurate leak detection, honest findings, and code compliant repairs.
Frequently Asked Questions
Common questions about leak detection and hidden water leaks.
We combine methods. Acoustic listening equipment picks up the sound of pressurized water escaping a pipe, thermal imaging reads temperature differences behind surfaces, pressure testing confirms which line is losing water, and camera inspection covers drain and sewer lines. The suspected location decides which tools get used.
Start at the meter. Turn off every fixture and appliance that uses water, then check whether the meter still moves. Movement points to an active leak. A rising water bill, warm flooring, a musty odor, growing stains, and the sound of running water with everything off are the other common signs.
Often, yes. Acoustic equipment, thermal imaging, and pressure testing are built to narrow the location without cutting into finished surfaces. Reaching an embedded or buried pipe still requires access for the repair itself. The point of detection is to keep that opening as small as the repair allows instead of searching by demolition.
It depends on the suspected location, how accessible the piping is, the size of the property, the complexity of the system, and how many areas need testing. We quote the detection work before it starts. Ask whether the diagnostic charge is credited toward the repair and get the answer in writing.
A leak running behind a wall or under a slab damages framing, flooring, and drywall while wasting water you pay for every month. Locating it accurately usually costs less than repairing the damage caused by opening the wrong wall.
Thermal imaging finds temperature differences, not water directly. It works well on hot water lines and on damp areas that read cooler than the surrounding surface. It is one input rather than a complete answer, which is why we pair it with acoustic or pressure testing.
By isolating the buried line, watching the meter, and using acoustic equipment to trace the sound of escaping water along the run. Surface clues narrow it further: soggy ground, unusually green patches, sunken soil, or water appearing on a driveway.
Slab leaks are located with acoustic listening equipment, thermal imaging, and pressure testing rather than by opening concrete first. Our page on detecting leaks beneath a concrete slab covers the process and the repair options in detail.
Your insurer decides that, and it depends on your policy language and the circumstances. Many policies treat a sudden pipe failure differently from long term seepage. We document the suspected source, the diagnostic findings, and the recommended repairs so you have something to submit. Ask your insurer what they need before repairs begin.
Yes. PowerRoute is a licensed plumbing and electrical contractor, so the same team handles the repair. Depending on what we find, that means a spot repair, a reroute, a section replacement, or repiping.
Emergency plumbing service is available 24/7, and same-day leak detection appointments are available when scheduling allows. If water is actively spreading, shut off the main supply when it is safe to reach and call (323) 616-2829.
Get Your Free Estimate Today
Think you have a hidden leak? Contact us for a free, no obligation estimate on professional leak detection and the repair that follows.