How to check for a hidden water leak
An unexplained jump in your water bill, damp patches or the sound of running water can point to a hidden leak. Your water meter is the simplest test.
Safety classification
Safe homeowner task
This guide covers safe first actions only. It is not a licence to perform regulated work or enter a dangerous area.
What to do
- 1
Turn off every tap and water appliance
Make sure nothing is using water — taps, toilets, washing machine, dishwasher, irrigation and evaporative coolers.
- 2
Read the meter
Write down the reading or photograph it. Many meters have a small dial or star that spins when water is flowing.
- 3
Wait without using water
Wait at least 30 minutes — longer is better — and read the meter again.
- 4
Compare the readings
If the reading has changed or the small dial moved, water is escaping somewhere between the meter and your fixtures.
- 5
Check the usual suspects
Look for running toilets, dripping taps, a hot-water relief valve running continuously, damp walls, soggy lawn or unusually green patches.
When to stop
- The meter moves but you cannot find the leak
- Walls, floors or ceilings are damp or stained
- Water is pooling near the house foundations
- Water is near electrical fittings
Plumbing
Prepare the problem, safety status and location once. The matching category will be pre-filled.
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