Hidden water & slab leaks
Best for supply lines you can't see.
- Behind finishes and under concrete
- Traced to the exact spot
- Targeted repair, not your whole floor
Leak detection: find the hidden leak before it finds your floors
Undetected leaks in water, gas, or sewer lines quietly run up your bill and damage your home. We locate them precisely, without tearing your walls or slab apart, using thermal imaging, acoustic tools and specialty gas sensors. Then we help you stop the next one.
- 4.9 from 114 Google reviews
- Make‑It‑Right Guarantee
- Leak detection from $385
- CA C-36 #890196
Signs you've got a hidden leak
Smell gas? Leave the house first, then call PG&E at 1-800-743-5000 (or 911) from outside. Once the utility says it's safe, we handle the repair.
Your water bill jumped
A spike with no change in how much you used often means a hidden leak. Lower pressure at the tap can point to a supply-line leak too.
See how we find itWater running with everything off
You still hear flow, or the meter dial keeps moving with every fixture off. Water is escaping somewhere.
Schedule a leak checkA warm or damp spot on the floor
A classic slab-leak sign: a hot-water line leaking under the concrete.
See how we find itMusty smell, mildew, or staining
Moisture migrating behind a wall or under flooring you can't see.
Schedule a leak check
Leak in the water line itself, or a line that keeps failing? See water line repair and repiping.
Reviews
Leak detection work, in our neighbors' words
“Right on time. Abel found the leak, and made a quick and complete repair. This job included replacing a gate valve with a ball valve.”
“Micah was awesome coming out on a Friday afternoon and staying into the evening. He diagnosed a problem we have been having for over a year, went under the house to fix it, and made sure it was working properly afterwards. Highly recommended.”
“They have bailed me out more than once. I live on a well and lost all water from my house. I could not get the pump going again myself. I called them at 7:30 AM and they had the issue fixed before noon that same day. …”
What we find
Water, slab, gas and sewer leaks, each with the right tool
Most leaks hide where you can't see them. We use the right tool for each kind, and tell you exactly what we found.
Financing available. Qualifying projects can be financed through Synchrony. Ask about your options when you request an estimate.
Everything we do
Our leak-detection toolkit
Our non-invasive toolkit
We find leaks without tearing your home apart: acoustic listening, pressure testing, thermal imaging, moisture mapping, and smoke or gas sensors, matched to the job.
- Acoustic listening
- Pressure testing
- Thermal imaging
- Moisture mapping
- Smoke testing
- Natural gas sensors
- Propane sensors
- Slab-leak location
Find it, and stop the next one
Beyond finding today's leak, we install smart automatic shut-off systems like the Moen Flo. It watches your main line and shuts the water off before a small leak becomes major damage. Ideal for second homes, rentals, and wineries.
- Moen Flo smart shut-off
- Whole-home leak sensors
- Auto shut-off valves
- Second-home protection
- Winery & commercial
- Leak-repair coordination
How it works
From "something's leaking" to located
Tell us the signs
Book online and describe what you're seeing: the bill, the damp spot, the sound.
We locate it, non-invasively
Thermal, acoustic, and gas tools pinpoint the source without opening walls.
Clear next steps
You get the exact location and honest repair options at a fixed price.
Backed by our guarantee
Upfront fixed pricing and our Make‑It‑Right Guarantee on workmanship.
Located, not guessed
Found precisely. Fixed for good.
Guesswork turns a small leak into a big demolition. Our tools find the source first, so the repair is targeted, and the work is backed by our Make‑It‑Right Guarantee. Serving Sonoma County since 2007.
- Non-invasive thermal & acoustic tools
- We find the source before any opening
- Natural gas & propane leak detection
- Smart auto shut-off systems installed
- Licensed: CA C-36 #890196
Ways to save on leak detection
Mention the code when you call, or add it to the notes when you book online.
Drains and sewer
Free
Sewer camera inspection with any drain service.
At the regular drain service price, we run a camera through your main line from a ground-level clean-out so you see roots and cracks.
See drain servicesSeniors 65 and older
10% off
Senior discount up to $250, any service.
For neighbors 65 and older. Mention the code when you book.
Residential only. One per household. Specials cannot be combined with each other or with any other discount.
Leak detection questions, answered straight
How do you find a leak without tearing up my house?
Thermal imaging, acoustic listening, pressure testing, and gas sensors let us pinpoint the source behind walls and under slabs before any opening is made.
What are the signs of a hidden water leak?
A water bill that jumps with no change in use, the sound of running water with everything off, a meter dial that keeps moving, a warm or damp spot on the floor, musty smells or staining, and a drop in water pressure.
What's a slab leak, and how do you find it?
A leak in a water line under the concrete foundation. We locate it with thermal and acoustic tools so the repair targets just that spot, not the whole floor.
How much does leak detection cost?
Electronic leak detection is $385 for the first hour. If it takes longer, each extra hour is $275, and we check with you before we keep going. A gas leak check is $325. You get the exact location and a fixed price for the repair before any work begins.
Do you detect gas leaks too?
Yes, natural gas and propane, with specialty sensing equipment. If you smell gas right now, leave the building and call your gas utility first, then call us.
What happens after you find the leak?
You get the exact location and honest repair options at a fixed price, and the repair targets just that spot. If the line itself is failing, we walk you through water line repair and repiping.
What's a whole-home shut-off, and is it worth it?
It's a smart valve like the Moen Flo installed on your main line. It monitors flow and shuts the water off automatically when it senses a leak. For second homes, rentals, wineries, and anyone who's had water damage before, it's well worth it.
Think you've got a leak? Let's find it before it spreads.
Same-day appointments often available across Sonoma County. Book online in about a minute, or call us.