Water Leak Detection in San Diego
If your water bill jumped, your meter is spinning, or drywall is staining, water is going somewhere it shouldn't. We locate hidden leaks fast using the right tool for the right leak, then repair them the same visit when the access allows.
What this actually is
Not every water leak is a slab leak. Most of what we chase in San Diego lives in walls, cabinets, hose bibs, irrigation manifolds, and pressure regulators. The problem is you can't fix what you can't find, and cutting drywall based on a guess turns a $400 repair into a $2,000 remodel.
We start at the meter, isolate the system in stages (interior versus irrigation, hot versus cold, upstairs versus downstairs), and then use acoustic and moisture tools to pinpoint. When we open a wall, we know what's behind it.
Water Leak Detection
- Meter and pressure diagnostics
We read the AMI meter with the house shut off to confirm loss rate in gallons per hour, then run a static pressure test to check the regulator.
- Acoustic listening on supply lines
Contact microphones on the pipe amplify the leak's specific frequency signature so we can trace it through a wall or ceiling cavity.
- Moisture and thermal mapping
Pinless moisture meters map the wet area behind drywall. Thermal imaging separates active leaks from old, dried stains.
- Same-visit repair when access allows
For angle stops, supply lines, pinholes, and accessible fittings, we detect and repair on the same call. You pay one trip fee, not two.
Need it handled today?
Give us a call. Same-day windows available.
Our process, step by step
- 1Confirm and quantify at the meter
Shut off every fixture, watch the meter for 15 minutes, and calculate the loss rate. That tells us whether we're chasing drips or gallons.
- 2Isolate irrigation vs interior
Close the irrigation shut-off and retest. About a third of San Diego 'water leaks' turn out to be a cracked drip manifold, not the house.
- 3Split hot from cold
Valve down the water heater and retest. Continued loss on the cold line points us straight at supply, service line, or a running toilet.
- 4Pinpoint with acoustics and moisture
Trace the loudest signature and confirm with a moisture meter. We mark the exact stud bay before touching drywall.
- 5Repair or scope next steps
Repair on the spot when it's a fitting or angle stop. When it's a wall pinhole in copper, we quote spot repair versus a section repipe so you decide.
The pattern here is not random. Two-story tracts in Rancho Bernardo, Poway, Scripps Ranch, and Carmel Valley leak into downstairs ceilings from upstairs shower valves and toilet supplies. Bungalow neighborhoods around North Park, South Park, and Golden Hill leak at 40-year-old angle stops, gate valves, and hose bibs. Larger lots in Rancho Santa Fe, Bonsall, and Fallbrook are almost always cracked poly or PVC in the irrigation lateral before the point of use. We start every call by asking about the yard, because in East County that solves it half the time before we set up any equipment.
What homeowners actually notice
If any of these match what you're seeing at home, it's worth a call before it gets worse.
- Water meter dial keeps moving with every fixture off
- Water bill up sharply with no change in habits or landscape
- Staining, bubbling paint, or soft drywall around a plumbing wall
- Musty smell under a sink or in a closet
- Pressure feels weaker than it used to at one specific fixture
- Popping or ticking sound in the wall when no one's using water
What this typically costs
A standard water leak location call in San Diego runs $250 to $450 depending on how many isolation zones we have to work through. Simple accessible repairs (angle stops, supply lines, hose bibs) usually add $150 to $350 done on the same visit. In-wall copper pinhole repairs start around $450. We quote each piece before we cut anything.
Common questions
How do I know if I actually have a leak?+
Shut every fixture in the house, then watch the low-flow indicator on your water meter for 10 minutes. If it moves at all, you have a leak. That's the same test we start with.
Can you find a leak inside a wall without cutting drywall?+
Yes. Acoustic amplification plus a pinless moisture meter locates most in-wall leaks within a single stud bay. We only cut once we've marked the exact spot.
Do you fix the drywall you cut?+
We handle clean access cuts and patch the drywall back to primer-ready. Texture matching and paint we leave to a finisher unless you want us to coordinate one.
How much water does a hidden leak really waste?+
A pinhole running full-time is 50 to 200 gallons a day. That's $30 to $120 a month in San Diego wasted before you ever see wall damage.
Is this covered by insurance?+
The water damage cleanup and drywall repair usually are. The leak location and pipe repair usually aren't. We invoice them separately so it's clean for your adjuster.
What if the leak is outside in the yard?+
We can trace service line leaks with acoustic ground mics. Irrigation leaks past the valve are usually diagnosed zone-by-zone. Either way you get a location and a repair price.
The Lefty guarantee
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Every job backed in writing. If it fails, we come back.
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Trusted by San Diego homeowners across the county.
Got a leak? Give Lefty a call.
Real diagnostics. Real prices. Real people who show up.