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Unusual water use is a reason to investigate, not automatic proof of a leak. Check the meter identity, units, reading source, timestamps and coverage before comparing periods. After a repair, preserve the original observations and gather enough comparable evidence before reporting an improvement.
Confirm which meter and units you are reading
A reading only becomes useful when it belongs to the right device and location. Record the serial, unit served, meter type and display unit. A photograph can help a reviewer inspect the display, but it should not silently override the number or make a model’s reading a billing authority.
Keep the asset record separate from the communications device. A manual meter, a pulse counter and a connected meter can provide different kinds of evidence. Do not assume a manufacturer name or a LoRaWAN or cellular label proves compatibility with a particular installation.
Understand cumulative readings before calculating usage
A cumulative register records a running total. The difference between two valid observations can describe consumption over the interval between them, provided the meter, unit and register continuity are understood. It does not automatically provide a daily profile for every day in that interval.
For a fictional example, observations of 10,000 litres and 10,600 litres indicate a 600-litre difference over the recorded interval. That difference is not a leak diagnosis. The team still needs the interval length, context and any gaps or changes in the meter.
Review gaps, resets and corrections
A missing interval is unknown usage, not zero usage. A lower cumulative value can indicate a changed meter, a register reset or an input error, and should be reviewed before a calculation proceeds. Preserve the original observation when making a correction.
| Observation | Why it needs review | Useful evidence |
|---|---|---|
| Missing interval | The period is not fully observed | Last valid reading and gap duration |
| Lower cumulative total | Register continuity may have changed | Meter identity and replacement/reset record |
| Manual entry correction | The original value may be wrong | Original value, reason and correction history |
| Unusual overnight use | Several causes are possible | Comparable readings and a site inspection |
Turn the alert into a specific field task
Give the technician the location, relevant meter identity, source observations and the question to answer. “Check unusual flow for Unit A-01” is more useful than a generic alarm with no context. Record access constraints and avoid presenting an alert as a confirmed customer fault.
If photos or location evidence are collected, keep access limited to the authorized account or team. Record the inspection result even when it does not confirm a leak; an unresolved signal still needs a clear next handler.
Compare like periods after a repair
A repair record and a verified recovery are different milestones. Select comparable observation periods, explain missing coverage and document changes in supply or occupancy that may affect the comparison. If the evidence is incomplete, keep the result unverified.
The WaterPesa possible-leak walkthrough illustrates a starting comparison, an investigation, a field visit, a repair and a result review. The exception example leaves recovery unverified when comparison readings are missing; no saving should be inferred from the existence of a completed work order alone.
What to include in the review
Use the same record set for the operator’s decision and the explanation given to the customer. A reviewer should be able to see where each number came from.
- Meter identity, location and unit served.
- Display unit, observation time and reading source.
- Original readings and any append-only correction history.
- Missing coverage, resets or meter replacements.
- Inspection and repair evidence, if work was carried out.
- Comparable post-repair observations and remaining uncertainty.
Common questions
Can a manual meter be part of a water monitoring workflow?
Yes. Record its identity, unit, observation time and reading source. Manual observations do not create continuous telemetry between readings.
Does high overnight use prove a leak?
No. It is a signal to investigate alongside context, coverage and a site check. The alert alone is not a diagnosis.
Can a meter photo automatically approve a bill?
A photo or suggested reading can support review, but it should not replace the organization’s approved reading and billing process.
Put it into practice
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