Direct answer
An underground leak is suspected when the meter moves with all known use off, damp ground persists or pressure changes without a visible indoor source. Test irrigation and other outdoor systems separately.
What can cause the problem or change the decision
| Possible factor | What to record safely |
|---|---|
| Failed buried supply pipe | Record the meter over a no-use period |
| Irrigation or pool connection leak | Turn irrigation scheduling off |
| Valve or meter-side issue | Map wet areas without digging |
| Drainage mistaken for supply water | Check utility responsibility boundaries |
Safe checks before professional work
- Record the meter over a no-use period
- Turn irrigation scheduling off
- Map wet areas without digging
- Check utility responsibility boundaries
Stop and get help
Sinkholes, rapid loss or water threatening structures needs urgent isolation and professional locating.
What information helps the next step
Timing
Note whether the symptom is constant, linked to rain, linked to a fixture or only at peak use.
Extent
List each affected outlet, room or inspection point without opening regulated components.
History
Keep previous invoices, camera footage, product model and renovation details.
Safety
State any gas smell, hot discharge, sewage, electrical proximity or structural movement immediately.
Frequently asked questions
Is this a complete DIY repair procedure?
No. It provides safe consumer observations and stops before regulated, hazardous or specialist work.
Which professional service matches this issue?
Start with Leak Detection: What the Service Covers. The actual diagnosis may identify a different work category.
How can I plan the cost?
Use Plumber Cost in Australia for sourced planning context, then compare written local quotes.