Hot-side pinholes
The single most common find. Hot copper in or under concrete, thinned by hard water and pressure, leaking continuously into sub-grade.
Find it before you open it
Leak Detection in Tustin, CA
Something is leaking and nobody can see it. Acoustic listening, pressure isolation and thermal imaging narrow it to a spot on a wall or floor, so the repair is one clean opening instead of a search.
- Non-destructive location first
- Written finding you can take to an insurer
- Works for supply, drain, irrigation and pool lines
Bring your last two water bills to the call, the jump size is diagnostic.
What this actually is
Why finding the leak is a separate skill from fixing it
Water is a liar. It appears at the lowest point it can reach, which is frequently nowhere near where it left the pipe. A stain on a hallway ceiling can come from a shower valve two rooms away, travelling along a top plate until it finds a gap. Cutting into the stain finds wet drywall and no pipe.
Detection is the discipline of narrowing that down before anything is opened. Isolate sections of the system and watch pressure decay to establish which line is losing water. Listen acoustically, because pressurised water escaping through a small hole makes a specific noise that carries through pipe and structure. Read temperature differentials where a hot line is involved. Trace the line electronically so you know what is actually behind the wall.
Done well, the output is a mark on a surface and a sentence: the hot line feeding the master bath is losing pressure, and the loudest point is here, roughly eighteen inches below the valve. That is a repair. Without it, you get exploratory demolition and a bill for guessing.
When a locate is worth booking
You do not need all of these. Any one that persists is enough.
- Water bill up sharply with no change in usage
- Meter moving with every fixture closed
- Sound of running water inside a wall or under a floor
- A stain, bubble or soft spot that keeps growing
- Musty smell in one room that will not clear
- Persistently damp soil or a green patch in a dry lawn
- Pool losing more than evaporation explains
A locate costs a fraction of what opening the wrong wall costs.
Get a Hidden Leak Located
Tell us what you can hear and where it is wettest.
Why it happens here
The hidden leaks we find most often in Tustin properties
Certain leaks repeat across this city because certain construction details repeat. Slab-on-grade tract housing hides hot-water lines under concrete. Older Old Town properties hide galvanized in lath and plaster. Newer developments run manifold systems through attics, where a single fitting drips onto a ceiling for months before it shows.
Outdoors is the other half of the work. Irrigation systems fail at valves and buried laterals, and because the ground is already meant to be wet, nobody notices until a bill arrives. Pool plumbing does the same thing. We test those separately from the house so the reading actually means something.
Shower and tub valves
Old valve bodies and failed solder joints behind tile. Shows up two rooms away on a ceiling, which is why locating matters.
Fittings and water heaters
Attic-mounted heaters and manifold fittings drip quietly onto insulation until the ceiling below stains or sags.
Irrigation and mains
Buried laterals, valve bodies and the service line between meter and house. Often the answer when the inside of the house is bone dry.
How the work goes
What a detection appointment involves
Roughly an hour to two hours, in this sequence.
STEP 01
Meter and history check
Read the meter with the house shut down to quantify the loss, and look at the bill history to see when it started. This separates a new failure from something that has been running for a year.
STEP 02
Isolate by section
Close off the water heater, the irrigation, the pool fill and individual branches in turn, watching what the meter and pressure gauge do. This is what tells us which system is losing water before we look for where.
STEP 03
Locate acoustically
Ground microphones and pipe-contact listening across the suspect run, working the sound to its loudest point. Where relevant, thermal imaging and line tracing confirm what the acoustics suggest.
STEP 04
Mark and document
The spot gets marked, and you get told what was found, how confident it is, and what the repair involves. If insurance is in play, we put the finding in writing.
Schedule a Detection Appointment
Most locates are done inside a single appointment.
Options and materials
The methods, and when each one earns its keep
Most jobs use two or three of these together. Any single method on its own has blind spots.
Pressure isolation testing
Sections closed off and pressurised, watching decay over time. Establishes which line is failing and roughly how badly, with no equipment near the leak itself.
Trade-off: Tells you the line, not the spot. Always the first step, never the last.
Acoustic location
Amplified listening for the sound of escaping water through slab, soil and structure. The workhorse for pressurised leaks under concrete.
Trade-off: Needs a quiet house and pressurised pipe. Not useful on a drain leak that only runs when a fixture runs.
Thermal imaging
Surface temperature mapping to trace hot lines and see moisture spread. Very good at confirming an acoustic find and showing how far water has travelled.
Trade-off: Reads surfaces, not depth. Excellent confirmation, poor as a sole method.
Camera and line tracing
A camera down drain and sewer lines, and electronic tracing to map where a buried line actually runs versus where the plans say.
Trade-off: The right tool for drains and laterals; irrelevant for a pressurised pinhole.
What it costs
What detection costs and why it saves money
Detection is quoted flat, before the visit, based on what you describe. That matters: an hourly search creates an incentive nobody wants. You should know the number before anyone opens a van door.
The economics are simple. A locate is a small fixed cost. Opening the wrong wall is drywall, tile, paint and a day of somebody time, and you still have not found the leak. On a slab, the difference between a precise locate and a rough one can be several feet of concrete.
- How many systems have to be ruled out, house, irrigation, pool, main
- Whether the suspect line is under slab, in wall, in attic or buried outside
- Property size and how much of the run needs to be worked acoustically
- Whether written documentation for an insurer is required
- Access: furniture, cabinetry and finished surfaces over the suspect area
Ask What a Locate Costs
Flat, quoted before we arrive. No hourly search.
Two tests you can run today
The meter test. Close every fixture and appliance. Photograph the meter. Wait one hour and photograph again. Any movement means water is escaping.
The water heater test. Close the cold inlet on the heater and repeat. If the meter stops, the leak is on the hot side. If it keeps going, look at cold lines and outside.
The irrigation test. Close the irrigation valve and watch again. A surprising share of mystery bills end here.
Write down what you hear. Time of day, which room, whether it changes when a tap runs. Detail on the phone shortens the visit.
Related work and where we do it
What a locate usually turns into, and where we do it.
Questions we get
Leak detection questions
The location work is. Acoustic listening, pressure testing, thermal imaging and line tracing all happen from the outside of the structure. Opening up only happens once we know where, and then only where the repair needs to happen.
On a pressurised line under a slab, a good acoustic locate typically gets within a foot or so. That is close enough to make a small opening. Drain leaks and intermittent leaks are harder, and we will tell you honestly when a result is a strong indication rather than a pinpoint.
Occasionally the answer sits outside plumbing, a roof penetration, a window flashing, condensation from ductwork. When that happens we tell you what it is and which trade to call. You still get the answer you paid for.
Yes. Both get isolated and tested separately from the house, which is often how a mystery bill gets solved. Pool plumbing and buried irrigation laterals are common finds and easy to miss if you only test indoors.
Yes. A written description of the testing done, what was found and where, plus photographs. That is generally what a carrier asks for when access costs are being claimed.
It is the normal case, not the exception. A leak between the meter and the house, or under a slab, can run for months without a visible sign because the water goes straight into soil or sub-grade. The meter test is the reliable indicator, not what you can see.
Ask About Your Symptom
Sometimes a two-minute call rules out a leak entirely.
Answers before demolition
Stop guessing which wall the water is behind.
One appointment, a marked spot and a written finding, then a repair that opens the right place first time.
(714) 598-4492The plumber we send gives you a firm price before work starts, and stands behind their own workmanship.