How to Check for Hidden Water Leaks with Your Water Meter
Discover the simple water meter test that can save you from costly water damage and skyrocketing bills by detecting hidden leaks before they become major problems.
That mysterious spike in your water bill or the faint sound of running water when everything's turned off could be your home's way of telling you there's a hidden leak. While some leaks are obvious—like a dripping tap—others can lurk behind walls, under floors, or in your yard for months, silently racking up costs and potentially causing serious damage. The good news? Your water meter holds the key to uncovering these sneaky water wasters.
The Simple Water Meter Test
Your water meter is like a detective that never sleeps, constantly monitoring water flow through your property. Here's how to put it to work:
- Turn off all water sources - Make sure no taps, toilets, appliances, or irrigation systems are running
- Locate your water meter - Usually found near the street in a covered box
- Record the current reading - Note the numbers displayed on the meter
- Wait 1-2 hours without using any water - This gives time for any hidden leaks to reveal themselves
- Check the meter reading again - If the numbers have changed, you've got a leak
Watch for the Flow Indicator
Modern water meters have a small wheel, triangle, or disk called a "flow indicator." This is your instant leak detector:
If this indicator moves when all water is turned off, water is flowing somewhere it shouldn't be. Even the tiniest movement signals a leak that needs attention.
Pinpointing the Leak Location
Once you've confirmed there's a leak, you can figure out whether it's inside or outside your home:
Shut off your home's main water valve (not the meter valve) and check the meter. If it still shows flow, the leak is between the meter and your house—likely in your yard. If the flow stops, the leak is inside your home.
Other Telltale Signs of Hidden Leaks
While the water meter test is your best DIY tool, keep an eye out for these other clues:
- Unexplained water bill spikes
- Musty odours or mould growth
- Peeling paint or wallpaper
- Warm spots on floors (for hot water leaks)
- The sound of running water when everything's off
What to Do Next
If your water meter test confirms a leak but you can't locate it, don't panic. Small leaks might only show up after several hours, so be patient. For persistent or hard-to-find leaks, it's time to call a licensed plumber who has specialised leak detection equipment.
Regular water meter checks are like getting a health check-up for your plumbing—they can catch problems early and save you from expensive repairs down the track.