San Diego, CA · Diagnostics
Signs of a Slab Leak
Under-slab plumbing gives you signals long before it gives you damage. Here is what each one means under a San Diego foundation.
- Warm spots and hot-side failures
- Meter and bill-based confirmation
- Sound, moisture and movement clues
- When to stop testing and call
Non-invasive locating
Four technologies, one square foot of certainty before anyone touches your slab.
- Acoustic
- Correlated listening on pressurized lines
- Thermal
- Hot-side imaging through finished floors
- Tracer gas
- Inert helium/nitrogen for silent leaks
- Pressure
- Zone isolation to confirm the failing loop
Dispatch & scheduling
(619) 923 - 0033The eight signals worth acting on
1. A warm patch of floor
The single most reliable indicator. Hot-side copper fails first in both coastal and inland San Diego soils, and the escaping water heats the slab directly above it. If a spot stays warm with the heat off, treat it as a slab leak until proven otherwise.
2. Water bill jumps with no change in use
A pinhole the width of a pencil lead can waste hundreds of gallons a day. Compare the same month year over year rather than month to month.
3. The meter moves with everything off
Shut every fixture and irrigation valve, then watch the low-flow indicator on the meter for fifteen minutes. Any movement means loss somewhere on the line.
4. Running water with no fixture open
A faint rush or hiss in a quiet house, usually loudest near the failure point. In slab-on-grade homes it often carries through the concrete rather than the walls.
5. The water heater never rests
Constant cycling means it's reheating water that's leaving the system. Pair this with a warm floor and the diagnosis is close to certain.
6. Musty smell, mildew or lifting flooring
Moisture wicking up through the slab lifts vinyl, cups hardwood and darkens grout. In coastal Encinitas and Oceanside soils it may surface far from the break, so don't assume the wet spot marks the pipe.
7. New cracks in tile, drywall or a sticking door
Saturated inland valley clay in Escondido, El Cajon and Santee expands and lifts sections of slab, which shows up as diagonal cracks and doors that suddenly bind.
8. A green stripe in the yard or a soft spot in the lawn
Usually the service lateral rather than the slab, but it's the same failure family and the same test sequence.
Seeing two or more? Call (619) 923 - 0033 or book slab leak detection. Then review what it costs and whether your insurance responds.
What we locate
Leak detection services in San Diego
Every call starts with electronic locating — acoustic, thermal, tracer gas and pressure isolation — so the repair in San Diego is surgical instead of exploratory.
Water Leak Detection
Acoustic correlation, thermal imaging and tracer gas to pinpoint pressurized water line failures inside San Diego walls, ceilings and service laterals — no exploratory demolition.
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Pool Leak Detection
Dye testing, pressure isolation and hydrophone listening on pools, spas and plumbing loops losing water to dry Southern California evaporation-plus-leak conditions.
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Slab Leak Detection
Tracking hidden line failures beneath San Diego foundations — hot-side pinholes, copper corrosion and post-tension slab breaches located to the square foot before a single cut is made.
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Underground Utility Locating
Electromagnetic locating and ground penetrating radar to map water, sewer, gas and conduit runs across coastal fill and decomposed granite before you excavate.
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Gas Leak Detection
Certified combustible gas surveys, pressure decay testing and line isolation on residential and commercial natural gas and propane systems throughout San Diego County.
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Commercial Leak Detection
Multi-unit, hospitality, retail and industrial leak investigation with after-hours scheduling, documented findings and reports your insurer and property manager will accept.
Learn moreDescribe what you're seeing
Warm floor? Spiking bill? Sound of water with everything off?
Tell us the symptoms and we'll tell you what it usually means in San Diego — and what locating it will take. Most calls are scheduled same day.