How to Shut Off the Water to Your House (in an Emergency)
When a pipe bursts, finding the main water shutoff fast is what saves your home. Here's where to find it, how to turn it off, and the other valves worth knowing.
This is the single most important thing to learn the day you move in. When a pipe bursts or a hose lets go, water pours in by the gallon, and every minute counts. Knowing exactly where your main water shutoff is — and that it actually turns — can be the difference between a wet floor and a destroyed home.
Find it before you need it
Don't go looking for the valve mid-flood. Locate it now, while you're calm. Common spots:
- Near the water heater or where the main line enters the house.
- Along an interior wall facing the street, often in the basement or garage.
- In a utility closet on the ground floor.
- Outside in a ground box near the curb (you may need a meter key to reach this one).
A reliable trick: find your water meter and follow the pipe into the house. The first valve on that line is usually your main shutoff.
The two valve types
- Wheel (gate) valve: turn it clockwise — righty-tighty — until it stops. These can stiffen with age, so test yours occasionally so it isn't seized when you need it.
- Lever (ball) valve: turn the handle a quarter turn until it's perpendicular to the pipe. Quick and reliable.
After shutting it off, open a faucet on a lower level to confirm the water stops and to drain pressure from the pipes.
Other shutoffs worth knowing
- Fixture shutoffs: small valves under sinks and behind toilets let you stop one fixture without killing water to the whole house. Use these for a single leaking fixture.
- Water heater shutoff: isolates the heater for service or a leak.
- Supply lines: the braided hoses feeding toilets, faucets, and washers — a top cause of indoor floods. Knowing their shutoffs is part of leak readiness.
Make it a household drill
Everyone who lives in the home should know where the main shutoff is and how to use it. Walk a partner or older kids through it. Tape a small label near the valve. It takes five minutes and pays for itself the first time something goes wrong.
Don't stop at the shutoff
Knowing the valve is step one of leak readiness. Pair it with checking supply lines yearly, preventing frozen pipes in winter, and watching for silent toilet leaks. Build your free Owner Tools to get the full plumbing checklist for your home — no login, no address required.