Look for continuous users
Check toilets, irrigation, tanks, outside taps, appliances and visible leaks. Automatic systems can consume water without anyone noticing day to day.
Use a controlled meter check
During a period when known water users are off, record the meter and check again later. Movement suggests unaccounted consumption but still needs interpretation.
Compare with previous periods
Consider occupancy, seasonal irrigation, building work and tariff changes as well as plumbing faults. A good investigation separates increased use from leakage before repairs are authorised.
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.
Water Meter Moves When Everything Is Off
Unexpected meter movement is a useful clue that water is being used somewhere, but it does not identify the source by itself.