A warm or hot spot on the floor
If one area of tile, wood or concrete feels warm when nothing else does, a hot water line under the slab may be leaking. It is one of the clearest slab leak signs.
Slab Leak Detection in Orange, CA
A warm spot on the tile. The sound of water under the floor when every tap is off. A water bill that keeps climbing. These are classic signs of a leak in a pipe under your concrete slab.
We find slab leaks for Orange homeowners and property owners by testing and listening from above the floor. You learn where the leak is before anyone breaks concrete.
- Know if it's the hot line or the cold line before any work starts
- Pinpoint the spot instead of breaking up a whole room
- A clear explanation of your options, in plain words
- Answered 24/7 at a local 714 number. Licensed, insured and certified
Tell us where the floor feels warm or where you hear water. We'll explain what the inspection involves before you book.
Quick answer
What Is a Slab Leak, and How Is It Found?
A slab leak is a leak in a water pipe that runs under or inside a home's concrete floor. Because you can't see it, it often shows up as a warm floor, a running water sound, or a high bill. Slab leak detection uses pressure tests to find which line is leaking, then acoustic and thermal tools to pinpoint the spot through the concrete.
Why Slab Leaks Need a Different Approach
A leak in a wall can be traced with a moisture meter and a small opening. A leak under four inches of concrete can't. Water under a slab spreads out under the floor, so where you feel it is not always where the pipe is broken.
That's why slab leak detection is about narrowing it down step by step:
- Is it the hot side or the cold side? A warm floor points to the hot line, but we prove it by testing each line on its own.
- Is the leak under the slab at all? Sometimes a leak behind a wall or in the yard mimics a slab leak. Testing rules that out.
- Where on the line is it? Listening through the concrete finds the loudest point, where water is escaping.
Our team is professional and experienced in this kind of testing, and we explain each step as we go.
How every visit works
- ListenWhat you have noticed
- TestMeter and pressure
- PinpointNarrow it to the spot
- ExplainOptions in plain words
Warning signs
Signs You May Have a Slab Leak
One sign can have other causes. Two or more together are worth testing.
The sound of running water with everything off
A hiss or rush under the floor when no faucet, toilet or appliance is running often means a pressurized line is leaking below you.
Your water meter keeps moving
Turn off all water and watch the meter's leak dial. If it still turns and you see no water anywhere, the leak may be underground or under the slab.
A higher water bill, or a water heater that runs all the time
A hot line leak means hot water keeps flowing out, so the water heater keeps working. You may see it on both the water and gas or electric bill.
Damp carpet, lifting flooring or a musty smell
Water coming up from below can dampen carpet pads, loosen tile or wood flooring, or leave a mildew smell near the floor.
New cracks in the floor or along baseboards
Cracks have many causes, so on their own they don't prove a leak. Together with the signs above, they're worth checking.
Feel a warm spot or hear water under the floor? Call (714) 439-5275. A slab leak doesn't fix itself, and every day it runs adds to the bill.
Common causes
What Causes Slab Leaks in Orange Homes?
01
Pipes rubbing against concrete or gravel
Pipes under a slab sit in contact with concrete and fill. As water flows and pipes expand and shrink, they can rub. Over years, rubbing wears a thin spot that starts to leak.
02
Hot water lines working harder
Hot lines heat up and cool down every day. That constant change adds stress, which is one reason many slab leaks are on the hot side.
03
Corrosion and pinhole leaks in older copper
Large parts of Orange were built in the 1950s to early 1970s, a period when many Southern California homes were built on concrete slabs. Pipes from that era may be thinning with age, and a small pinhole can open under the floor.
04
High water pressure
Pressure that runs too high strains every joint and bend in the line, including the ones you can't see.
05
Soil movement
Small shifts in the soil under a home can put stress on pipes held in place by concrete.
Our process
How We Find a Slab Leak Before Anyone Breaks Up Your Floor
- 1
We start with what you've noticed
Where is the warm spot? Where do you hear water? When did the bill change? This tells us which line and which part of the house to test first.
- 2
We confirm a leak with the meter
With all fixtures off, we check the water meter. If it moves, water is leaving the system.
- 3
We test the hot and cold lines one at a time
We isolate each line and pressure test it. The line that loses pressure is the one that's leaking. This also tells us if the leak is under the slab or somewhere else.
- 4
We trace the pipe's path
Pipes under a slab don't always run where you'd expect. A line locator helps us follow the path so the search stays on the right line.
- 5
We pinpoint the spot through the concrete
An acoustic listening device picks up the sound of water escaping. On hot lines, a thermal camera can show the warm area on the floor. Together they narrow the leak to a small spot.
- 6
We mark it and explain your options
We mark the spot on the floor and explain what we found. Options can include a spot repair through the slab or rerouting the line. If you want us to handle it, see slab leak repair on our water leak repair page.
Want to know for sure what's under your floor? Call (714) 439-5275 or request a slab leak inspection.
Equipment
Tools That Find Leaks Under Concrete
Pressure test gauges and line isolation
They show which line is losing water, and if the leak is under the slab at all. This step comes first, because it decides where the rest of the search happens.
Acoustic listening devices and ground microphones
Water escaping under pressure makes a sound. These devices amplify it through concrete and flooring, so a technician can follow it to the loudest point.
Thermal imaging cameras
On a hot water line, the leak warms the concrete above it. A thermal camera shows that warm area as a clear shape on the floor.
Pipe and line locators
A locator traces where the pipe runs under the slab, so the listening search follows the real path of the line.
Tracer gas (when needed)
For very small leaks that are hard to hear, a safe gas can be put into a drained line and picked up where it escapes through the concrete.
Why Locate a Slab Leak Before Breaking Concrete?
- One small opening instead of a torn-up room. Knowing the spot means the floor is opened only where the pipe is, if it needs to be opened at all.
- Less damage to flooring. Tile, wood and carpet near the leak can often be protected or saved.
- Lower water and energy bills. A hot line leak wastes water and the energy that heated it.
- Better repair choices. When you know which line leaks and where, you can compare a spot repair with a reroute using real facts.
- A record for your insurer. A located leak is easier to explain to an insurance company.
Before anyone breaks concrete, call us first: (714) 439-5275.
Why choose us
Why Orange Homeowners Call Clearcrest for Slab Leaks
We test before we guess
Every slab leak search starts by proving which line is leaking, so the search stays focused.
We know the homes here
Many Orange homes date from the 1950s to early 1970s. We plan each slab leak test around the home in front of us.
We explain what we find
You see the marked spot and hear your options in plain words.
One call can cover the repair too
If you want, we can also fix the leak we found.
A local 714 number, answered 24/7
Clear service terms and a 100% Satisfaction Guarantee.
Our commitments
What You Can Count On
- Licensed, insured and certified.
- Transparent service process. Every test explained, every finding shown.
- Clear service terms. Read our terms.
- 100% Satisfaction Guarantee.
- Available 24/7 at (714) 439-5275.
Licensed
Insured
Certified
How do I know if I have a slab leak?
The most common signs are a warm spot on the floor, the sound of running water with everything off, a water meter that keeps moving, and a higher bill. A pressure test confirms it.
Will you break my floor to find the leak?
Usually not. Finding the leak is done from above the floor with pressure tests, listening tools and thermal imaging. The floor is only opened later if you choose a spot repair, and then only at the marked spot.
Why is only one spot of my floor warm?
A leaking hot water line warms the concrete right above and around the leak. The warm spot is a strong clue, but water can travel under the slab, so we confirm the exact spot with testing.
Is it safe to stay in my home with a slab leak?
In most cases, yes, but don't wait. Water under a slab can damage flooring and lead to mold over time. If water is coming up through the floor, turn off the main water valve and call us.
Can a slab leak cause foundation problems or mold?
It can. Water that runs under a slab for a long time can soak the soil and the flooring above it, and damp materials can grow mold. Finding it early lowers that risk.
Is a slab leak covered by insurance in California?
It depends on your policy. Many policies treat the cost to find and access the leak, the pipe repair, and the water damage differently. Check your policy or call your insurer. A clear record of where the leak was found helps.
How much does slab leak detection cost?
It depends on the size of the home, how many lines need testing, the type of flooring, and how deep or hard to hear the leak is. Call us, tell us what you're noticing, and we'll explain what the inspection involves before you book.
How long does slab leak detection take?
It depends on the home and the leak. A hot line leak with a clear warm spot is often quicker to find than a small cold line leak. We'll give you a better idea once we hear what you're seeing.
How do I get ready for the visit?
Write down where the floor feels warm and when you first noticed it. Have a recent water bill handy. Clear a path to the water heater, the main shut-off and the water meter. If you can, keep pets in another room.
Service area
Slab Leak Detection Across Orange
We find slab leaks in homes across Orange, from Old Towne to East Orange, and in nearby cities in Orange County: Anaheim, Santa Ana, Tustin, Garden Grove and Villa Park. See all service areas.
What we do
Other Ways We Help
Hidden Water Leak Detection
Stains and damp spots in walls and ceilings
Learn more
Water Line Leak Detection
High bills, a moving meter, wet yard spots
Learn more
Pipe Leak Detection
Pinhole leaks and leaking supply pipes
Learn more
Pool Leak Detection
Pools and spas losing water
Learn more
Pool Leak Repair
Fixing the pool leak once it is found
Learn more
Commercial Leak Detection
Apartments, condos and business buildings
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Emergency Leak Detection
Active leaks, day or night
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Water Leak Repair
Pipe, slab and water line repairs
Learn more
Warm Floor or Water Running Under the Slab?
You don't have to break up a room to find out. Call us, tell us what you're noticing, and we'll find the leak and explain your options before any concrete is touched.
Answered 24/7 · Licensed, insured and certified · 100% Satisfaction Guarantee