How to Read Your Water Meter
To check for leaks, make sure no water is running in your house, then look at your water meter. If the low-flow indicator (usually a small red triangle or star) is moving, you have an active leak somewhere in your plumbing system.
Locate Your Water Meter
Before you can read the meter, you have to find it. In colder climates, it's often inside; in warmer areas, it's usually near the street.
- Inside: Check the basement or utility closet where the main water pipe enters the foundation.
- Outside: Look for a metal or plastic lid set flush with the ground near the curb or sidewalk.
- Use a large screwdriver or a meter key to carefully pry off the outdoor lid.
Understand the Display
Most modern meters have a straightforward digital or analog display that records water usage in gallons or cubic feet.
- The large numbers read like a car odometer, showing total historical water usage.
- Some analog meters have a sweep hand that measures smaller units (like single gallons).
- Digital meters may alternate between the total read and current flow rate.
Use the Leak Indicator
The most important feature for homeowners is the low-flow leak indicator, designed to detect very small amounts of water movement.
- Look for a small red, black, or blue triangle, star, or gear wheel on the face of the meter.
- If this dial is spinning when all faucets and appliances in the house are off, water is escaping somewhere.
- Even a slow rotation indicates a significant, continuous leak.
Perform a Leak Test
If you suspect a leak but the indicator isn't obviously spinning, you can perform a longer observation test.
- Write down the exact numbers on the odometer gauge.
- Do not use any water (don't flush toilets or run the ice maker) for 2 to 3 hours.
- Check the meter again; if the numbers have gone up, you have a hidden leak.
When to Call a Professional
Call a leak detection specialist if your meter proves you have a leak, but you cannot find any dripping faucets or running toilets.
What a Plumber Will Do
A plumber uses electronic leak detection equipment, thermal imaging, and pressure testing to locate hidden leaks inside walls or under the concrete slab.
Frequently Asked Questions
Who is responsible if the meter is broken?
The municipal water company owns and maintains the meter itself. If it is malfunctioning, they will replace it at no direct cost to you.
How do I convert cubic feet to gallons?
If your meter reads in cubic feet, multiply the number by 7.48 to determine the exact number of gallons used.
Where is the most common hidden leak found?
The most common culprit for a spinning leak indicator is a silently running toilet tank, followed by dripping outdoor hose bibs.
How much water does an average home use?
The average family of four uses approximately 10,000 to 12,000 gallons of water per month indoors.