Before you call anyone, there's a simple test that answers the most important question: is water actually escaping somewhere? The water meter test takes about 30 minutes, costs nothing, requires no tools — and gives you a definitive yes or no.
Every property with a water meter can do this. Here's exactly how, what the results mean, and what to do next in each case.
Step 1: Turn off everything that uses water
Shut off all faucets, showers, and hose bibs. Make sure dishwashers, washing machines, and ice makers aren't running. Tell everyone in the house not to flush or run water during the test — even a toilet refill will skew the result.
Step 2: Find your water meter and read it
The meter is usually in a ground-level box near the street or property line. Lift the lid, clear any dirt from the dial, and write down the exact reading — or photograph it. Note the small leak indicator: a triangle, star, or dial that spins with even tiny flows.
Step 3: Wait 30 minutes — use nothing
Leave all water off for at least 30 minutes. An hour is even better if you can manage it. This is the hard part: no flushing, no handwashing, nothing.
Step 4: Read the meter again
Compare. If the reading changed — or the leak indicator moved — water flowed through the meter while everything was off. You have a leak. If nothing moved, your plumbing held: no leak on the pressurized side.
If the meter moved: indoor or underground?
Here's the key follow-up: shut off your home's main valve (where water enters the house) and repeat the test. If the meter still moves, the leak is between the meter and the house — an underground service-line leak. If it stops, the leak is inside the house — a fixture, toilet, water heater, or hidden pipe.
What a pro does next
The meter test proves a leak exists; professional detection finds where. Acoustic listening traces pressurized leaks, thermal imaging maps hidden moisture, and tracer gas finds silent pinholes — pinpointing the location so repair means one targeted fix, not exploratory demolition.
Common Questions
What is the leak indicator on a water meter?
Most meters have a small triangle, star, or gear — the leak indicator — that rotates with even minuscule flow. If it moves while all water is off, you have a leak. It's more sensitive than the numbered dials.
How long should I wait for a water meter leak test?
Thirty minutes is the practical minimum; an hour gives more confidence for slow leaks. Very slow weeps may need longer — if you suspect one, run the test for two hours.
If the meter moves with the main valve off, where is the leak?
Between the meter and your house's main valve — the underground service line. That's a job for underground water line leak detection: acoustic tracing and tracer gas pinpoint the break without digging up the yard.
Can I do a leak test myself?
Yes — the meter test described here is the standard DIY check and it's completely safe. What requires a professional is locating the leak once the test confirms one exists.
Suspect a Leak? Don't Guess — Detect.
Every day a hidden leak runs costs you water and risks damage. Call now for professional, non-invasive leak detection in Santa Fe, NM — open 24/7.