Leak Detection in Orange County, CA โ We Find It Without Tearing Open Your Walls
A hidden leak runs around the clock. The longer it goes, the more it costs โ in water, in damage, and in repairs. Orange County has more hidden and slab leaks than almost anywhere in California, because of aging copper pipes, hard water, and clay soil that shifts with every season. OC Plumbing Pros locates leaks using electronic detection and thermal imaging โ no guessing, no unnecessary demolition. We find the exact location, explain what we found, and give you the price in writing before any repair begins.
- Same Day
- Electronic Detection
- No Wall Damage to Find It
- All 34 OC Cities
Leak Detection Service in Orange County: Quick Answers
| Question | Answer |
|---|---|
| Do you do leak detection? | Yes. Inside the house, under the slab, in the yard, and in irrigation lines. |
| Do you fix it too, or just find it? | Both. Most detection companies only locate the leak and send you to a plumber. We are the plumber. |
| What does it cost? | Most detection visits in Orange County run $150 to $500. You get the price before we start. |
| How close can you pinpoint it? | Usually within a foot or two, often closer. We mark the spot on the floor, wall, or ground. |
| How soon can you come? | Same day in most of Orange County, 7 days a week. |
High Water Bill? How to Check Your Water Meter for a Hidden Leak
This two-minute test tells you whether you have a leak and roughly where it is. You do not need any tools.
Turn off every water user
Faucets, toilets, dishwasher, washer, ice maker, and the sprinkler timer.
Find your water meter
It is usually in a concrete box near the curb. Lift the lid.
Watch the small leak indicator
Most meters have a little triangle, star, or wheel. Watch it for two minutes.
Close the main shutoff at the house and watch again
This tells you whether the leak is inside the house or between the meter and the house.
What the result means
| What you see | What it usually means |
|---|---|
| Indicator is still | No active leak on the supply side. The bill may be a toilet that runs on and off, or irrigation. |
| Indicator moves, then stops when you close the house shutoff | The leak is inside the house: slab, wall, water heater, or a fixture. |
| Indicator keeps moving with the house shutoff closed | The leak is between the meter and the house, or in the irrigation lines. |
Write down what you saw. It saves time when we arrive, and it tells us which equipment to bring.
Signs You Have a Hidden Leak Right Now
A hidden leak rarely announces itself. These are the signs it is there before the damage becomes obvious.
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Your water bill jumped without any change in use
A sudden increase in your water bill with no added household activity is the most reliable early sign of a hidden leak. A slab leak running under your foundation can waste hundreds of gallons a day. A pinhole leak inside a wall runs around the clock. The meter keeps moving whether you are using water or not.
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You can hear water running when everything is off
Turn off every faucet and appliance in the house. Stand in a quiet room and listen. If you can hear running or dripping water and nothing is on, water is moving through a pipe that has no business carrying it right now.
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A warm or hot spot on the floor
This is one of the clearest signs of a slab leak specifically on a hot water line. The pipe under the concrete is leaking warm water into the slab, and that heat transfers up through the floor. If one section of tile or hardwood feels noticeably warmer than the rest of the floor, call for a leak check.
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Wet, soft, or discolored patches on walls or ceilings
A pipe leaking inside a wall pushes moisture through the drywall over time. The paint bubbles or the drywall softens before you see actual water. A ceiling stain below an upstairs bathroom is a common one. Do not wait for it to get worse.
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New cracks in walls, tile, or the floor slab
A slab leak that has been running long enough erodes the soil under the concrete and creates voids. The slab then shifts and cracks. If you are seeing new cracks in interior walls or floor tiles in a home that has been settled for decades, a slab leak may be the cause.
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Mold or mildew smell with no visible source
Hidden moisture feeds mold inside walls and under flooring. If you smell mold but cannot find visible growth, water is feeding it from inside the structure.
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Low water pressure in one area of the house
When a pipe leaks, pressure bleeds off before it reaches your fixtures. Low pressure in one bathroom or one section of the house that has no other explanation often points to a leak in that branch of the supply line.
Think you have a hidden leak?
The longer it runs, the more it costs. Call now.
Call (949) 804-1047Same day service · 7 days a week · Written price before we start
Types of Leaks We Find and Fix
Slab Leaks
A slab leak is a break in a copper or galvanized pipe running under the concrete foundation of your home. It is the most common leak detection call we get in Orange County, and for good reason โ this county has the exact combination of conditions that cause them. We detect slab leaks with electronic acoustic equipment that listens for the sound of water escaping under pressure through the concrete. No breaking open the floor to find it. We confirm the location with a pressure test, then give you repair options based on what we find.
Hidden Wall and Ceiling Leaks
Pipes run through walls and ceilings throughout your home. When a fitting fails, a joint corrodes, or a pipe is damaged, water escapes into the wall cavity. We use thermal imaging to identify temperature differences behind walls that indicate moisture โ warm for hot water leaks, cool for cold water leaks โ without cutting open drywall to look for it. We locate the source, make the smallest possible access opening to reach the pipe, and repair it.
Underground Supply Line Leaks
The supply line running from the city meter to your house is underground and often forgotten until it fails. Signs include a persistently wet area in the yard above where the line runs, a water bill that is high even before you use anything, and low pressure throughout the whole house. We use acoustic detection and pressure testing to confirm the leak location before any digging.
Pinhole Leaks in Copper Pipe
Copper pipe in Orange County develops pinhole leaks from the inside out. Hard water combined with chloramine treatment creates a chemical environment that pits the copper wall from within over decades. These leaks start tiny but grow. A single pinhole can spray water into a wall cavity for months before it shows on the surface. We pressure test the supply lines to identify where pressure is dropping and use thermal imaging to find the moisture point.
Irrigation and Yard Line Leaks
A broken irrigation line or outdoor supply connection can waste significant water without showing any sign inside the house. If your water bill is high but you cannot find any indoor leak, the outdoor supply or irrigation system is the next place to look. We check the shutoff at the meter and pressure test each zone to find where water is escaping.
How We Find Leaks Without Tearing Up Your Home
Most plumbers used to locate leaks by opening walls and floors until they found water. That meant cutting drywall, breaking tile, and sometimes jackhammering concrete on a guess. We do not work that way.
Electronic Acoustic Detection
Every pressurized water leak creates a sound โ a hiss, a vibration, a frequency that travels through the pipe and into the surrounding material. Electronic acoustic detectors amplify and isolate that sound, allowing us to trace it to its source through concrete, soil, and building materials without cutting anything open. For slab leaks, this is how we confirm the exact location before recommending any access point.
Thermal Imaging
Water affects temperature. A hot water leak behind a wall creates a warm spot. A cold water leak creates a cool spot. A thermal camera reads the surface temperature of walls and floors and shows us where those temperature differences are hiding moisture. It is fast, accurate, and completely non-invasive.
Pressure Testing
We isolate sections of the plumbing system and test them under pressure. A section that loses pressure has a leak somewhere in it. This tells us which branch of the supply system the leak is in before we use acoustic or thermal tools to narrow down the exact spot. It also confirms whether a suspected leak is active and how significant the loss rate is.
Camera Inspection
For leaks in sewer or drain lines, we run a camera through the pipe to see the crack, joint failure, or point of damage directly. This is the only reliable method for drain line leaks that do not show up on pressure tests.
Why Slab Leaks Are So Common in Orange County
Orange County has higher rates of slab leaks than most of Southern California, and there are three specific reasons for it.
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Aging copper pipe
More than half of all Orange County homes were built before 1980. The copper pipes installed in those homes โ which run under the slab as well as through the walls โ are now 45 to 65 years old. Copper does not last forever, and it lasts shorter in this county than in most.
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Hard water and chloramine treatment
Orange County water is treated with chloramines rather than plain chlorine. Chloramines are more effective at disinfection but harder on copper pipe. In combination with water that runs 13 to 19 grains per gallon of dissolved minerals, the result is accelerated pitting corrosion on the interior wall of the pipe. The pipe thins from the inside over years until it fails.
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Clay soil and seasonal movement
The ground beneath most Orange County homes is expansive clay. When it rains, the clay absorbs water and swells. In dry months, it contracts. That seasonal movement shifts and stresses the pipes embedded in and under the concrete slab all year, every year. At joints and elbows โ the places where pipes are already under the most stress โ that movement eventually causes cracks.
Put all three together โ old copper, aggressive water chemistry, and moving soil โ and a slab leak is not a random event. It is the predictable result of conditions this county has had for decades. OC Plumbing Pros sees it in homes from Yorba Linda to San Clemente to Seal Beach, wherever the housing stock is old and the water is hard.
Slab Leak Repair Options
Finding the leak is only the first step. Once we know exactly where it is and what caused it, we give you a clear picture of your repair options.
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Spot repair
We make a targeted access opening in the floor above the leak, repair or replace the failed section of pipe, and patch the opening. This is the lowest cost option and works well when the leak is isolated and the surrounding pipe is otherwise in good condition.
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Pipe rerouting
If the pipe section under the slab is deteriorated beyond a spot repair, or if the leak is in a location that is difficult to access, we reroute the supply line through the wall instead of under the slab. The failed underground section is abandoned in place and a new line is run overhead. This avoids further slab work entirely.
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Epoxy pipe lining
For copper supply lines that have developed multiple pinhole leaks, epoxy lining coats the inside of the existing pipe with a barrier that seals current leaks and prevents new ones. It is a less invasive option than full repipe when the pipe structure is still sound.
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Repipe
If the home has aging copper throughout and the slab leak is a symptom of broader pipe deterioration, the most cost-effective long-term fix is replacing the supply lines throughout the home with PEX pipe. We always present it as an option when the underlying pipes suggest more failures are coming.
Leak Detection and Repair Cost in Orange County
| Service | Typical Range |
|---|---|
| Leak detection, inside the home | $150 โ $400 |
| Slab leak detection | $250 โ $500 |
| Underground or yard line detection | $250 โ $500 |
| Irrigation leak location | $150 โ $350 |
| Slab leak spot repair | $500 โ $1,500 |
| Slab leak reroute (single line) | $600 โ $2,500 |
| Meter to house line repair | $500 โ $2,000 |
| Wall or ceiling leak repair | $250 โ $800, plus patching |
What moves the price: how many lines we need to test, how deep or long the buried line is, and whether the floor is tile, hardwood, or carpet over the leak. You get a written price before we start, for the detection and again for the repair.
Does homeowners insurance cover leak detection and repair? It depends on the policy and the cause. Most homeowners policies cover sudden, accidental water damage โ the damage to your floors, walls, and belongings from a leak. Many do not cover the pipe repair itself if the cause was slow wear over time, which most slab leaks are. Detection costs are also often not covered. Take photos before any work starts, call your insurer the same day you discover the leak, and ask specifically whether the detection, the repair, and the resulting damage are each covered separately.
Not sure if you have a leak?
We will come out, test the system, and tell you exactly what is happening. No fee to show up.
Call (949) 804-1047Same day service · Written price first · All 34 OC cities
Found a Water Leak? What to Do Before the Plumber Arrives
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Shut off the main valve at the house
If water is coming out, close the main shutoff first. If you cannot find it, shut the water off at the meter with a meter key or a pair of pliers. If you have no water at all after shutting it off, keep the house valve closed and call โ we will get you running again.
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Take photos before touching anything
Document stains, wet spots, and the meter reading. Your insurer will want them, and they help us understand what we are walking into before we arrive.
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Call your insurance company the same day
If there is damage to floors or walls, call your insurer before any repair work starts. Ask whether the detection, the pipe repair, and the water damage are each covered โ they are often treated differently under the same policy.
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Do not open walls yourself to look
Cutting in the wrong spot adds repair cost without finding anything. Electronic detection locates the source without any demolition โ let us find it first, then make the smallest possible access opening in the right place.
Leak Detection Questions, Answered
Three conditions stack up here that do not occur together in most other markets. First, more than half of OC homes were built before 1980 and still have their original copper pipe, which is now 45 to 65 years old. Second, Orange County water is treated with chloramines and runs 13 to 19 grains per gallon โ both of which accelerate copper corrosion from the inside. Third, the soil under most OC homes is expansive clay that swells in wet months and contracts in dry months, stressing the pipes under the slab with every cycle. Any one of these would be manageable. All three together is why slab leaks here are not rare events โ they are expected in older homes.
Months, sometimes longer. A small pinhole under pressure loses water continuously but slowly enough that the water bill increase looks like normal variation. The moisture travels through the slab and soil rather than surfacing immediately. By the time a wet spot appears on the floor or a wall crack shows up, the leak has often been running for 3 to 6 months. The water meter is the best early check โ turn off every faucet and fixture in the house and watch the meter for 15 minutes. If the dial moves, water is going somewhere it should not be.
Yes. A slab leak that runs long enough erodes the soil under the concrete slab, creating voids. When those voids grow large enough, the slab loses its support and begins to shift and crack. In serious cases this affects door frames, interior walls, and the structural integrity of the floor. The damage compounds over time. A slab leak caught early is a repair job. One that goes for a year or more can become a structural problem that costs far more than the plumbing repair alone.
Most leak detection visits run $200 to $500 depending on the type and complexity. A straightforward slab leak detection with electronic acoustic equipment is typically $250 to $400. Detection that requires both thermal imaging and a pressure test to isolate a supply line leak runs toward the higher end. We give you the detection price before we start and apply it as a credit toward the repair when you proceed with us the same day.
There are four main options. Spot repair opens the floor directly above the leak, replaces the damaged pipe section, and patches the slab. Pipe rerouting abandons the underground section and runs a new line through the wall above the slab. Epoxy lining coats the inside of the existing pipe to seal current leaks and protect against new ones. Full repipe replaces the supply lines throughout the home when the pipe is deteriorated beyond targeted repairs. We present all applicable options with the cost and tradeoffs for each and let you decide.
Start with the water meter test. Turn off every water-using fixture and appliance in the house โ faucets, toilets, dishwasher, ice maker, irrigation. Find your water meter, usually in a covered box near the street. Write down the reading or photograph the dial. Wait 15 to 30 minutes without using any water. Check the meter again. If the reading changed, or if the small leak indicator dial (a small triangle or star on most meters) is spinning, water is moving through the system with everything off. That is a leak until proven otherwise.
Usually, yes. Slow leaks are quieter, so we isolate each line first to narrow the area, then listen in a quiet house. Thermal imaging and moisture readings help confirm it. A very slow leak can take longer to pin down, and we tell you if that is the case.
If the meter keeps moving with everything off, and it stops when you close the shutoff at the house, the leak is inside. Add a warm spot on the floor, the sound of running water, or cracking tile, and a slab leak is likely. A detection visit confirms it.
That is often a leak in the line from the meter to the house, or an irrigation line. The steady water keeps that strip greener than the rest of the lawn. It is one of the easiest outdoor leaks to spot.
It depends on the policy. Many cover the water damage to floors and walls. Many do not cover the pipe repair itself if the cause is wear over time. Detection is covered by some policies and not others. Call your insurer and ask about each part separately.
Yes. For duplexes, triplexes, and small buildings, we test each unit's lines to narrow down which one is leaking. Tell us how the water is metered when you call.
Most homes take one to two hours. Large properties, long service lines, or several irrigation zones can take longer.
We Detect and Fix Leaks Across All 34 Orange County Cities
High water bill? Warm floor? Sound of running water?
Do not wait for the damage to show up. Call today.
Call (949) 804-1047Licensed & insured · Same day service · All 34 OC cities