A hidden water leak can go unnoticed until your water usage rises or a damp patch appears. Pipes behind walls, beneath floors and underground are not always easy to inspect, so recognising the early warning signs can help you act before damage spreads.
For Cape Town homeowners, the starting point is simple: notice what has changed, check what you safely can, and have the cause investigated. These seven signs can point to a leak, but none should be treated as a diagnosis on its own.
1. Your water usage increases without an obvious reason
If your household routine has stayed the same but your recorded water consumption has increased, it is worth checking for leaks.
Look at the kilolitres used, rather than only the rand amount on your bill. A higher bill can also reflect tariff changes, a longer billing period or an adjustment from estimated to actual readings. Visitors, irrigation and topping up a pool can also explain additional usage.
2. Your water meter changes when no water is being used
A meter check can help identify water flowing when you do not expect it.
Close all taps and make sure nobody flushes a toilet or uses water. Ensure washing machines, dishwashers, irrigation and automatic top-up systems are not drawing water. Record the meter reading, allow a period with no water use, and check again.
If the reading increases, investigate further. A leaking toilet or an overlooked automatic supply could be responsible; the problem is not necessarily a pipe inside a wall. For a shared meter, the check must account for everyone supplied by it.
The City of Cape Town provides practical guidance on finding and fixing water leaks.
3. Damp patches keep appearing on walls, ceilings or floors
A stain that grows, returns after drying or remains damp during dry weather deserves attention. Look around bathrooms, kitchens and the walls adjoining them.
Take photos to record changes. Roof leaks, failed waterproofing, condensation and moisture rising through masonry can also cause damp, so identifying the source matters before repairs begin.
4. A musty smell persists in a cupboard or room
A lingering musty smell beneath a sink, behind a cupboard or in a seldom-used room can indicate trapped moisture.
Inspect accessible areas for damp surfaces or drips. Improve ventilation where practical, but do not assume ventilation alone will fix the problem. If the smell returns, the moisture source needs investigation.
5. Paint bubbles, plaster deteriorates or skirting swells
Moisture can cause paint to lift and timber or fibreboard finishes to swell. You may notice peeling paint near the floor, damaged cupboard bases or skirting pulling away from the wall.
Painting over the damage may hide it temporarily. The moisture source should be addressed and the affected area allowed to dry before decorating or replacing finishes.
6. Water pressure drops unexpectedly
A noticeable change in pressure can sometimes accompany a leak. However, blocked tap aerators, valve problems and municipal supply work can cause similar symptoms.
Check whether the change affects one fitting or several. If neighbouring properties are affected too, it may be a supply issue. Persistent unexplained pressure loss warrants a plumbing inspection.
7. You hear water running when everything should be off
A continuous trickling or hissing sound may be a useful clue, especially when no tap or appliance is in use.
First check whether a toilet cistern is still filling or an appliance is drawing water. If the sound continues without an obvious explanation, note where it is loudest and arrange an inspection.
What should you do if you suspect a leak?
Record the symptoms, take clear photos and keep any meter readings. Check accessible taps, toilet cisterns and visible pipe connections without dismantling fittings.
For an active leak, close your property’s water shut-off valve if you know where it is and can reach it safely. Keep away from water near electrical fittings and avoid standing beneath a bulging or sagging ceiling. Arrange urgent plumbing assistance in Cape Town in these situations.
Repairing the source comes first. Once it has been addressed, damaged plaster, paint, cupboards or flooring may need attention. Regular checks can also form part of your home maintenance routine.
Need plumbing assistance in Cape Town?
CM Tech assists with plumbing repairs and general property maintenance across Cape Town.
Send us your suburb, a brief description of the problem and photos of any visible damage. We can discuss the work required and arrange an assessment.
Call: 071 499 6667 · WhatsApp CM Tech
