When a pipe bursts, every minute matters. A standard 1/2" supply line at typical DFW pressure (60–70 psi) dumps roughly 6 gallons per minute — enough to flood a kitchen in under 10 minutes. Knowing where your main shutoff is and how to use it is the single most valuable home-safety skill you can build.
Find your main shutoff before you need it
In a typical DFW home, the main shutoff lives in one of three places:
1. Inside the garage near the water heater
Older homes (built 1970–2000) often have a quarter-turn ball valve on the cold-water inlet line as it enters the house. It usually sits near the water heater, sometimes inside an access panel.
2. In the front yard near the meter
Most DFW homes have a curb-stop valve in a green or black plastic box near the property line, usually under the front lawn next to the sidewalk. You'll need a long flathead screwdriver or a meter key (cheap on Amazon) to turn it.
3. Inside an exterior wall
Some newer homes have a quarter-turn valve mounted on the side of the house where the supply line enters. Usually painted to blend in.
How to actually shut it off
Quarter-turn ball valve (the easy case)
The handle is parallel to the pipe when open and perpendicular when closed. Turn it 90° — that's it.
Wheel-style gate valve (older homes)
Turn the wheel clockwise until it stops, then back it off a quarter turn. Don't crank it past stop — these valves can break when fully seated, and you'll be replacing the valve in addition to whatever else just happened.
Curb-stop at the meter
Lift the meter lid, find the rectangular tab or square nut, and turn 90° clockwise (perpendicular to the pipe = closed). A meter key with the right square fitting is the right tool. Don't use channel locks unless you have nothing else — they can round off the nut.
After you shut it off
- Open a faucet somewhere low in the house (basement laundry tub if you have one). This relieves pressure and confirms the shutoff is actually working.
- Turn off the water heater — gas to OFF or breaker off. A heater running dry will burn out the element in minutes.
- Call a plumber. Even a "small" leak that you've isolated needs a real repair — not just a stop on the supply.
Things that go wrong
- Valve won't budge: Don't force a stuck wheel valve, you'll snap the stem. Shut the curb stop instead.
- You can't find the meter: Look for a green plastic lid in the front yard, often near the sidewalk or driveway edge. If it's overgrown, drag a shoe across the lawn near the property line — you'll feel the lid.
- Curb stop is also broken: Call your water utility's emergency line. They'll dispatch someone to shut off at the street main.
Make this 10x easier in 5 minutes
Right now, before you finish reading this:
- Walk outside and find your meter lid.
- Take a photo of its location relative to the house.
- Tape a label on your inside main shutoff (if you have one).
- Save your water utility's emergency number to your phone.
The next time something goes wrong, you'll be glad you did. And if you're in the and need help right now, call us — we'll talk you through it on the phone while we dispatch.
