Quick answer: To screen for an active water leak, stop normal water use, note the meter reading, wait during a no-use period, and compare the reading again. EPA WaterSense describes a two-hour comparison as one homeowner method. Any movement suggests water is being used somewhere and merits further checking.
Quick answer: Turn off every water-using fixture and appliance, note the meter reading, wait 30 to 60 minutes without using water, then read it again: any movement means water is flowing somewhere it should not be. The test confirms a leak exists but cannot tell you where it is; that takes a professional inspection.
Written by the DeSoto Leak Detection Editorial Team

Reviewed for clarity, safety, local relevance, and source attribution.

Updated September 26, 2026 · Editorial standards

A meter check is useful because it looks at the plumbing system as a whole. It cannot tell you whether the cause is a toilet, irrigation system, fixture, appliance, slab line or underground service line. Its value is in answering the first question: is water still being consumed when nothing should be using it?

Homeowners often use the phrase water leak meter for the meter combination of a total register and a low-flow indicator. The register shows volume over time, while the indicator can respond to a very small continuous flow that is easy to miss in the main reading.

What the meter result can tell you

Think of the result as a branching point rather than a final diagnosis.

Close view of a residential water meter dial during a leak check in DeSoto, TX
Illustrative leak-detection imagery. Comparing meter readings over a period with no water use shows whether water is still moving.
  • No meter change during a controlled no-use period makes an active continuous leak less likely, although intermittent leaks can still occur.
  • Any meter movement suggests water is flowing somewhere during the test window.
  • A built-in leak indicator may move even when the main numbers are hard to read, depending on the meter design.
  • A meter test should account for toilets, ice makers, water softeners, irrigation controls and other systems that can use water automatically.
  • If the meter changes but no visible source is found, professional leak detection can help narrow the location.

How a professional evaluation is typically approached

The cleanest test eliminates as many hidden water uses as practical.

Checking the shutoff valve at a curb side meter box during leak detection in DeSoto, TX
Illustrative leak-detection imagery. The meter box shutoff lets one section of the system be isolated during an evaluation.
01
Pause water useTurn off faucets and avoid showers, laundry, dishwashers and other planned uses.
02
Check automatic systemsMake sure irrigation, appliances or other systems are not running during the test.
03
Record the meterWrite down the starting reading or use the meter's available leak indicator.
04
Compare and investigateIf the reading changes, trace visible sources and consider professional location services when the source remains hidden.

Why a meter test cannot pinpoint the leak

The meter sits upstream of many parts of the property, so it measures flow without identifying where it goes. A changing reading tells you that water is moving; it does not tell you which branch, fixture or buried section is responsible. That distinction matters when deciding what to do next.

For properties in DeSoto, documenting the meter result alongside the location and timing of visible symptoms can make a professional inspection more efficient. If the meter moves only at certain times, note what systems are active during those periods.

Reading the Low-Flow Leak Indicator

Many analog meters use a small triangle, star or diamond shaped dial that turns when water moves through the meter. Many digital meters instead display a leak icon, flashing symbol or continuous-flow message. Meter models vary, and some older meters do not provide a separate indicator, so follow the face design and instructions for your utility meter rather than assuming every display works the same way.

Low-flow leak indicator triangle on a water meter in DeSoto, TX
Illustrative leak-detection imagery. The small triangle or star dial can turn slowly even when every tap in the house is off.

With all known water use off, watch whether the low-flow indicator keeps moving and record the main reading before and after a no-use period. Movement is evidence that water is flowing somewhere; it does not identify the fixture or pipe. Dallas readers can compare the meter and adjustment context in the Dallas leak detection and Dallas Water Utilities guide. For a DeSoto address, the DeSoto ZIP code guide for 75115 and 75123 explains the local service-area context.

What to have ready before you call

Have these observations available:

  • Starting and ending meter readings
  • Length of the no-use test
  • Whether irrigation was disabled or inactive
  • Any recurring toilet, faucet or appliance issues
  • Where you see moisture or hear water

Practical DeSoto context and next-step guidance

For a DeSoto property, the useful starting point is the pattern of the symptom rather than an assumption about the cause. With meter movement, shutoff conditions, fixture isolation, and overnight monitoring, the same visible clue can have different explanations depending on where water, air, pressure, or moisture is traveling. A careful source investigation therefore starts with observations that can be repeated and compared: when the symptom appears, whether it changes with water use, whether weather or HVAC operation matters, and whether the affected area is close to a known plumbing route.

A practical way to think about water meter leak checks is to separate three questions: what is happening, where is it happening, and what evidence can narrow the source. That sequence helps avoid premature repair assumptions. For example, a stain, wet patch, pressure change, sound, or water-bill increase is evidence of a symptom, not automatically proof of the exact failed component. A provider may use one method to narrow the area and another to confirm the source before recommending access or repair.

The diagnostic method should match the property and the symptom. Using a simple usage check to decide whether hidden water loss may be occurring can involve visual inspection first, followed by targeted use of moisture measurements, thermal imaging, acoustic equipment, pressure observations, or another specialized technique when appropriate. No single instrument produces perfect results in every building. Surfaces, insulation, temperature, pipe material, water pressure, accessibility, and the timing of the leak can all affect what a test can show. Good source location is therefore based on converging clues rather than a single reading.

Before a call, write down the exact room or outdoor area involved, what the symptom looks or sounds like, when it began, and whether it changes after showers, fixture use, irrigation, HVAC operation, or rainfall. Take a few clear photos without moving damaged materials unnecessarily. If the issue is active, note whether water is spreading, pooling, staining a ceiling, or changing the appearance of flooring or walls. Those details give the referring service and the independent provider a more useful starting point.

Common questions

Does a changing water meter always mean a pipe is broken?

No. It means water is being used or flowing somewhere. A toilet, irrigation system, appliance or other fixture can account for the movement.

Can an intermittent leak pass a meter check?

Yes. A short test can miss a leak that only occurs during certain conditions or uses. Record when the symptom appears and repeat testing only as appropriate.

Is a water meter check safe?

It is generally a simple observation, but follow the meter design and your utility's instructions. Do not open sealed equipment or manipulate utility hardware.

What should I do if the meter changes and I cannot find the source?

Check obvious fixtures and irrigation first. If the use remains unexplained, professional leak detection can help determine whether the source is concealed.

How this guide was prepared

Practical, sourced and transparent

We separate what can be explained from general guidance, what depends on the property, and what must be confirmed by an independent provider or public authority.

Clear authorship

Prepared by the DeSoto Leak Detection Editorial Team with a reader-first editorial process.

Claim discipline

No fabricated reviews, licenses, awards, pricing promises, response times or field-work claims.

Primary-source links

Safety and utility topics point readers to official sources when a public authority is the right reference.

Sources and further reading

Sources & further reading

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