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Call a plumber for water escaping within the property or a meter that moves when every outlet is off. Call a roofer when dampness appears only with rain or wind. If the meter moves but no source is visible, start with a plumber and ask whether specialist leak detection is needed. Report a leak in the road, meter box or upstream of the property boundary to the local water authority; responsibility varies by municipality and service arrangement.
This guide is written for South Africa, Australia, New Zealand. Always check local codes, product specifications, licences, and site conditions.
Record the clues before making the first call
A ceiling stain is a symptom, not a diagnosis. A few safe observations help the right professional arrive prepared and prevent an unnecessary opening, excavation or repair.
- Photograph the affected area, exposed pipework, meter position and any wet ground before the evidence changes.
- Record whether the water appears during rain, fixture use, hot-water use, irrigation or a no-use period.
- Note the meter reading only when all ordinary water users, appliances, irrigation and top-ups are paused.
- Identify the property shut-off point without forcing a seized, damaged or unfamiliar valve.
- Keep people away from wet electrical fittings, a sagging ceiling, sewage or fast-moving water and obtain urgent qualified help where needed.
Match the evidence to the first call
The table identifies a sensible first contact, not a remote diagnosis. Water can travel along framing, pipes and finishes before it becomes visible.
| What you observe | Best first contact | Why this route fits |
|---|---|---|
| Meter moves during a controlled no-use test, but no source is visible | Plumber | A plumber can isolate branches and decide whether specialist location work is justified. |
| Dampness or dripping appears only after rain or wind | Roofer or building-envelope professional | Roof coverings, flashing, gutters and wall junctions are more likely than a metered supply fault. |
| Water appears only when a shower, basin, appliance or drain is used | Plumber | The problem may be a waste connection, seal, fixture or appliance line rather than a constant supply leak. |
| Water is in the road, meter box or clearly before the private service point | Local water authority | The authority can confirm the network boundary and the correct fault-reporting route. |
| Wet ceiling near lights, wiring or a bulge | Urgent qualified professional | Keep clear of the area and do not touch wet electrical equipment or a sagging ceiling. |
Step by step
Separate rain entry from a supply leak
Ask whether the symptom changes with rainfall. A stain that darkens during rain, especially near a roof penetration, external wall or gutter line, should be assessed as weatherproofing first. Use the roof-leak guide to record wind, rain duration and the highest likely entry area rather than assuming the stain sits below the fault.
Run a controlled meter check
When it is safe and practical, stop ordinary water use, confirm toilets, appliances, irrigation and pool or tank top-ups are not cycling, then record the meter and recheck it after a set no-use period. Movement supports a supply-side investigation but does not identify the exact pipe or prove that all moisture is plumbing-related.
Choose the right professional
Call a plumber for a private supply, fixture, drain or appliance issue. If the meter points to a concealed leak after visible checks, ask the plumber whether pressure testing or leak-detection methods are appropriate before anyone opens a wall, floor or garden. Call a roofer for rain-linked entry and the local authority for a suspected public-side or meter-side fault.
Give the professional useful evidence
Share clear photographs, timing, meter readings, affected rooms, recent work, appliance or weather triggers and any known pipe route. Ask what the proposed inspection can confirm, what repair work is excluded and which part of the service route the authority or contractor considers their responsibility.
Repair the cause, then verify the area stays dry
Do not paint, reseal or close a wall just because the visible symptom stops. After repair, confirm the relevant event no longer recreates the issue: a no-use meter test for a supply leak, normal fixture use for a drain fault, or suitable rain for a roof fault. Only then restore finishes that were damaged by moisture.
Expert tips
- Do not cut into a ceiling, remove tiles, excavate or seal over the first visible stain without evidence of the water path.
- A plumber can coordinate or recommend leak detection; it is not a substitute for first excluding toilets, irrigation, appliances and visible pipework.
- Municipal repair responsibility is location-specific. Confirm the service boundary with the authority rather than relying on a general rule from another area.
- For rain-linked symptoms, record the weather pattern and inspect from the ground or roof space only where access is safe; avoid wet, steep or unfamiliar roofs.
- If a water issue also affects electrical equipment, ceiling stability, contaminated water or structural materials, prioritise safety over finding the source yourself.
Common questions
Can a plumber find a hidden leak without breaking walls?+
Often a plumber can narrow the likely route with isolation and testing. Whether specialist leak detection is appropriate depends on the pipe material, access and evidence. No method should be presented as a guaranteed no-damage solution for every property.
Should I call my municipality or a plumber first?+
Call the municipality for a suspected public-network, meter-box or street-side leak. Call a plumber for a leak within the private property or where a meter check points to internal water use. If the boundary is unclear, report the exact location and ask the authority to confirm responsibility.
Is a roof leak the same as a plumbing leak?+
No. Rain-linked entry often originates in the roof or building envelope and may not affect a water meter. A steady supply leak can occur in dry weather and may move the meter even when all outlets are off.
What should I tell the professional?+
Share when the leak happens, meter readings, affected rooms, weather or appliance triggers, photographs and whether electricity, ceilings or structural areas are involved. That information helps select a safer first test.
Sources & further reading
We link to official building-code, government and public-health material where a technical or safety claim needs authoritative context. Local rules and adopted code editions can change.
- City of TshwaneHow to detect a water leak on your propertySouth African municipal guidance on meter checks, visible leak checks and when professional help is needed.↗
- City of Cape TownWater meter readings and water leaksMunicipal guidance on property water leaks, public-property fault reports and meter-related services.↗
- SA Department of Employment and LabourElectrical installation and Certificate of Compliance requirementsOfficial reminder to use registered electrical contractors and obtain valid certification.↗
Stop if the work involves structural uncertainty, hazardous materials, heights, live services, gas, serious water damage, or regulated work. Local rules differ—use an appropriately licensed professional where required.