Record when it happens
Note whether the symptom is constant or intermittent, which fixtures are affected and whether it changes when other water outlets are used. Timing and distribution often provide more useful evidence than the symptom alone.
Check the local-versus-system pattern
Compare nearby fixtures where it is safe and practical. A fault affecting one outlet usually follows a different investigation path from a symptom affecting an entire bathroom, hot-water system or property.
What a plumber needs to know
Send the location, a concise symptom description, any recent work to the same area and clear photos or video where useful. Avoid dismantling pressurised fittings or concealed services simply to obtain more information.
Related information
Damp Wall Near Plumbing
Dampness near pipe routes can result from a concealed leak, waste leak, waterproofing failure, condensation or moisture from another source.
How to Use a Water Meter as a Leak Clue
A meter can show unexplained water use, but the result must be interpreted carefully before it is treated as proof of a concealed leak.
Simple Water-Meter Checks for a Suspected Hidden Leak
A meter test does not locate a leak, but it can help establish whether water is flowing when known outlets are closed.
Suddenly High Water Bill
A high bill is evidence of increased recorded consumption, not proof of a concealed pipe leak. Start by ruling out common continuous water users.