You can confirm whether a leak exists with your water meter before calling anyone. Locating it is where professional equipment helps.
What this service solves
- Unexplained high water bills
- Moisture or stains with no visible source
- Warm spots on floors (hot water slab leaks)
- Water running sounds when fixtures are off
- Wet spots in the yard
Common symptoms
- Water meter moving while all fixtures are off
- Musty smell or visible mold
- Warped flooring or loose tile
- Peeling paint or bubbling drywall
- A water heater that runs more than usual
- Cracks in walls or flooring alongside moisture
Most likely causes
Supply line failure
Pressurized pipes leak continuously, so even a small failure adds up.
Drain leaks
Drain leaks only occur when fixtures are used, which makes them intermittent and easy to miss.
Slab movement and abrasion
Pipes under concrete can wear where they contact concrete or gravel, especially with soil movement.
Fixture seals
Shower pans, toilet wax rings and tub drains are common sources of leaks that look like pipe failures.
How the problem is diagnosed
- Meter test: shut off all fixtures and watch the low-flow indicator.
- Isolation: close valves to separate hot, cold, irrigation and building supply.
- Acoustic listening: ground microphones pick up the sound of pressurized water escaping.
- Thermal imaging: shows temperature differences from hot water leaks or evaporative cooling.
- Pressure testing: confirms which line is losing pressure.
- Moisture mapping: meters trace how far water has traveled.
Repair and replacement options
| Option | Best for | What to know |
|---|---|---|
| Targeted access repair | Leaks located within a small area | Open only the pinpointed spot and repair the pipe. |
| Reroute | Slab leaks and inaccessible lines | Abandon the leaking line and run a new one through walls or attic. |
| Repipe | Repeated leaks in the same system | Replace the system rather than chase leaks one at a time. |
What a plumber normally does
- Confirm a leak with the meter.
- Isolate which system is leaking.
- Pinpoint with acoustic and thermal tools.
- Mark the location and recommend the least invasive repair.
Emergency warning signs
- Water actively pooling
- Ceiling sagging
- Hot water leak causing a hot floor spot
- Rapidly spinning meter
If you see any of these, shut off water first. See emergency plumbing steps.
What affects the cost
We don’t publish national price figures because real quotes vary too much by region, access and the condition of your system. These are the factors that move the price:
- Number of systems to test
- Location (wall, slab, yard)
- Equipment required
- Whether repair is done at the same visit
Ask for a written quote that names the method, materials and any permit or restoration work before work begins.
DIY vs. calling a professional
Reasonable for homeowners
- Meter test with all fixtures off
- Food-coloring test in toilet tanks
- Checking under sinks and around the water heater
- Reviewing water bills for changes
Call a professional for
- Pinpointing leaks in slabs and walls
- Pressure testing isolated lines
- Underground service line leaks
Prevention and maintenance
- Check the meter a few times a year
- Install a leak detector near the water heater and washer
- Keep pressure in a normal range
- Replace aging supply hoses
Specific leak detection services
Leak Detection: common questions
How can I tell if I have a hidden water leak?
Turn off every fixture and water-using appliance, then look at the water meter. If the dial or low-flow indicator moves, water is leaving the system somewhere. Recheck after an hour without using water to catch slow leaks.
Can a leak be found without tearing out walls?
Usually. Acoustic listening, thermal imaging and pressure isolation can often narrow the leak to a small area so only a small access opening is needed.
Why is my water bill suddenly high?
Running toilets are the most common cause, followed by dripping fixtures, irrigation leaks and hidden supply leaks. Check toilets first with a few drops of food coloring in the tank.
Do smart water monitors help?
Flow-based monitors and automatic shutoff valves can detect unusual flow and close the supply. They are useful for vacation homes and homes with past leaks.
Is a musty smell a sign of a leak?
It can be. Persistent musty odors, especially near bathrooms, kitchens or exterior walls, often come from moisture behind surfaces.
Leak Detection in specific cities
Local conditions change how this problem shows up. These city guides cover local factors in depth:
- Leak Detection in Houston, TX
- Leak Detection in Dallas, TX
- Leak Detection in San Antonio, TX
- Leak Detection in Phoenix, AZ
- Leak Detection in Los Angeles, CA
- Leak Detection in San Diego, CA
- Leak Detection in San Jose, CA
- Leak Detection in Las Vegas, NV
- Leak Detection in Austin, TX
- Leak Detection in Fort Worth, TX
- Leak Detection in Mesa, AZ
- Leak Detection in Glendale, AZ
- Leak Detection in Plano, TX
- Leak Detection in Irvine, CA
- Leak Detection in Sacramento, CA
- Leak Detection in Oklahoma City, OK
- Leak Detection in Jackson, MS
- Leak Detection in Corpus Christi, TX
- Leak Detection in Baton Rouge, LA
