How Do I Check My Water Meter for a Leak?
Your water bill jumped, but nothing in the house looks wet. No puddle under a sink, no damp spot on a ceiling. So where is the water going?
Your meter can settle the question in about fifteen minutes. So how do I check my water meter for a leak? You run three tests in order. The first confirms whether water is moving when it shouldn't be. The second narrows it to inside the house, your irrigation system, or the line underground. The third checks the usual suspects indoors.
We'll start by finding your meter and reading it, since most Frisco homeowners have never opened that box. Then we'll walk through each test. We'll also cover what your meter can't tell you, and how professional leak detection can pinpoint the problem when the meter confirms one but you can't find it.
How Do You Check a Water Meter for a Leak?
You can check your water meter for a leak in about fifteen minutes:
- Turn off every water fixture and appliance inside and outside, including ice makers and irrigation.
- Find your meter, usually in a covered box near the curb.
- Look at the leak indicator, a small triangle, star, or dial that spins when water moves.
- If it's spinning with everything off, you have a leak.
- No indicator? Write down the reading, wait an hour without using water, and check again.
A changed reading means water is moving somewhere. Leave your main valve open during this test, since closing it stops the flow you're trying to measure.
Confirmed a leak but can't find it? See our leak detection in Frisco.
Find Your Meter and Learn to Read It
Your water meter sits in a covered box in the ground, usually near the curb or sidewalk. The lid is often marked "Water Meter." It's about the size of a shoebox lid, and it takes a screwdriver or similar tool to lift. The meter also marks the ownership boundary — the line from there to your house is yours.
Look before you reach in. Meter boxes sit outdoors year-round, and spiders and insects like them. Lift the lid all the way off and give it a moment before putting a hand anywhere near the meter.
Once it's open, you'll see two things that matter. The row of numbers works like a car odometer, read left to right, and that's what the city bills you on. Near the center is the leak indicator, a small triangle, star, snowflake, or dial that moves whenever water flows through.
Digital meters look different. Instead of a spinning dial, they show a flashing icon or a flow rate on a small screen. Frisco is converting meters from radio signal to cellular, so yours may not match your neighbor's.
One more thing before you start. There's a shutoff valve on the city's side of the meter, and that one isn't yours to touch. Your own main shutoff is a separate valve, and we'll use it in the second test.
Test 1: Does Water Move When Everything Is Off?
This is the test that answers the question. It takes a few minutes of setup and a few minutes of watching.
- Turn off everything that uses water. Taps, showers, the washing machine, and the dishwasher. Don't forget the ice maker, the irrigation system, and anything else on a timer.
- Tell the household. One flushed toilet mid-test gives you a false result.
- Open the meter box and find the leak indicator.
- Watch it for two or three minutes. If it turns at all, water is moving somewhere in your system.
Leave your main valve open. Don't shut off the water to your house for this test. You're trying to measure whether water is flowing, so the path has to stay open. Closing the main valve is part of the second test, not this one.
No leak indicator on your meter? Write down the full reading instead. Wait one to two hours without anyone using water, then read it again. A different number means water moved while you waited.
One caution. Some leaks come and go, like a toilet flapper that only cycles now and then. A short test can miss those. If your bill says leak but your meter says no, run the longer version and check your toilets anyway.
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Test 2: Is the Leak Inside or Outside?
You've confirmed a leak. The next test tells you roughly where to look, and it uses the same meter.
Start by finding your home's main shutoff valve. In most Frisco homes it's in the garage or near the water heater. Close it, then open an indoor faucet to confirm the water actually stopped. Now go back and check the leak indicator again.
| What you see | What it means | What's next |
|---|---|---|
| The indicator stops | The leak is inside your house | Check toilets and fixtures with Test 3 |
| The indicator keeps moving | The leak is outside, between the meter and your shutoff valve, or in your irrigation system | Shut off your irrigation water and check again |
| It stops after you shut off irrigation | The leak is in your sprinkler system | Have the irrigation system checked |
| It still moves with both shut off | The leak is in the underground service line | This needs professional leak detection |
That last result is the one people least expect. A service line leak sits underground between your meter and your house, and it can run for months without showing on the surface.
The other results narrow things down nicely. An indoor leak is usually something simple, and the next test finds it.
Test 3: Check the Usual Suspects Inside
If the indicator stopped when you closed your main valve, the leak is inside. Start with the toilets, because they cause more indoor leaks than anything else.
A leaking toilet often makes no sound at all. Water slips past a worn flapper and down the drain, all day, without a hint. The dye test finds it in about fifteen minutes:
- Take the lid off the tank.
- Add a few drops of food coloring or a dye tablet to the tank water.
- Don't flush. Wait fifteen to twenty minutes.
- Look in the bowl. Color in the bowl means the flapper is leaking.
Two things Frisco gives you for free. The city hands out leak tablets for this exact test. Call 972-292-5800 to ask for some. The city also offers a free sprinkler checkup, where a licensed city irrigator inspects your system for waste and broken heads. You can schedule one through the myFRISCO app.
Repeat the dye test on every toilet in the house. One at a time is fine, and it costs nothing but patience.
If the toilets pass, check a few other spots. Look under sinks, at the water heater and its drain line, and at outdoor spigots and hose bibs. A slow drip at a hose bib can run for weeks without anyone noticing.
What Your Meter Can't Tell You
Your meter is a good detective and a poor mapmaker. It proves water is moving, and it narrows the area. It will never tell you where the leak is.
That's fine when the answer is a toilet flapper. It's a problem when the water is going into the ground or under your foundation. An underground service line leak sits between your meter and your house, often with no wet spot on the surface to follow.
Slab leaks are harder still. The pipe runs beneath your foundation, so the water has nowhere obvious to go. Look for a warm spot on the floor, the sound of running water when nothing is on, or damp carpet with no source above it.
Finding a leak like that takes equipment, not eyes. Acoustic listening gear and pressure testing pinpoint the spot before anyone opens a wall or cuts concrete. The alternative is guessing, and guessing wrong means a hole in your floor and the leak still running.
If your meter says yes but your house looks dry, we can find the leak without tearing up your floors. For a confirmed leak beneath the foundation, our slab leak repair team handles the repair.
The Frisco Leak Credit Clock
Once you've found a leak, a clock starts. The City of Frisco offers a partial leak credit on your billed water consumption, as a courtesy to customers. It won't erase the bill, but it can take some of the sting out of a bad one.
First, the part people don't expect. A leak on the customer's side of the meter is the property owner's or tenant's responsibility to repair, including all costs. The city bills for the water that went through the meter, whichever side of it the leak was on.
Here's what the credit requires:
- Repair within 90 days. The repair must take place within 90 days of the leak being detected.
- Request within 90 days of the repair. The request has to be submitted in that window.
- Include the invoice. A copy of the repair invoice must come with the request form.
- Once per 12 months. The credit is granted one time every 12 consecutive months.
Some losses don't qualify. Water lost to theft, vandalism, negligence, or construction damage isn't covered.
Timing works out slowly. The city won't consider your request until the repair is done and your meter has been read, which usually happens after the next billing cycle. Keep paying your regular bill in the meantime.
The practical takeaway is simple: the clock starts the day you find the leak, so keep the invoice. For current terms and the request form, check with the City of Frisco directly.
Bringing Decades of Expertise to Frisco
Your meter can prove you have a leak. Finding it is our job. We locate leaks under slabs, in walls, and underground, then repair them and document the work.
We answer calls 24/7. Before you call, read reviews from Frisco homeowners about working with Berkeys in Frisco.
Berkeys Plumbing, A/C & Electrical
Business Address: 4645 Avon Ln Suite 260, Frisco, TX 75033
Call (214) 216-1727 for leak detection in Frisco.
We're There When You Need Us!
877-746-6855
Frequently Asked Questions
No, leave your main valve open for the first test. You're checking whether water flows when nothing is running, so the path has to stay open. Closing the valve comes later, in the second test. That's how you tell an indoor leak from an outdoor one.
The triangle is your leak indicator, and it spins whenever water moves through the meter. Some meters use a star, a snowflake, or a small dial instead. It turns fast when water is running and slowly when water is dripping. If it moves with everything off, you have a leak.
Wait at least one to two hours between readings, with no water used at all. A short wait may not show a slow leak. Write down the full reading before and after, and read left to right like a car odometer. Any change means water moved while you waited.
Water meters can fail, though it isn't common. Run the leak test first, since a real leak is the more likely explanation for a high bill. If your tests all come back clean and the bill still doesn't make sense, contact the City of Frisco about your meter. They can check the reading on their end.
Toilets and irrigation systems cause most unexplained high bills. A toilet can leak silently all day past a worn flapper. Irrigation problems hide in plain sight, through broken heads, bad alignment, or a timer running longer than you think. Both are worth checking before you look anywhere else.