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How Do You Shut off Water to a House in an Emergency?

Last updated October 23, 2026

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The short answer

Locating Your Main Water Shutoff Valve

Your home's main shutoff valve is usually inside, where the main water pipe enters the foundation. Common locations include utility rooms, near the water heater, in a garage, or in a crawlspace. It is a round or lever-style valve on a pipe. Keep your shutoff valve location written down for quick access during a crisis, like a plumbing failure during a storm.

How to Turn off the Valve

Turn the valve clockwise until it will not move further. A round gate valve may require several full turns. A ball valve lever needs only a quarter turn so it is perpendicular to the pipe. If the valve is stiff, use pliers carefully. Never force it, as an old valve could break and worsen the leak. Once off, test by opening a faucet; no water should flow.

  • Gate Valve: Turn the round handle clockwise several times.
  • Ball Valve: Move the lever handle a quarter turn.
  • Use a wrench or pliers if the handle is stuck.
  • Turn slowly to avoid damaging old, corroded pipes.
  • If the valve breaks, shut off water at the street.
  • Label your main valve for easy identification.

Using the Street Shutoff at the Meter

If the indoor valve is inaccessible or broken, use the curb stop in the water meter box. This metal or plastic lid is near the street or sidewalk. You will need a long water meter key to reach the valve inside. Insert the key onto the valve stem and turn it clockwise. This valve controls water for your entire property, so only use it if necessary.

What to Do After the Water Is Off

Once the water stops, assess the source of the leak. Remove standing water with a wet vacuum or mop to prevent immediate damage. Move furniture and belongings away from wet areas. Open windows for ventilation if it is safe. Contact a plumber for permanent repairs to the broken pipe or fixture. For significant water, local water damage pros can help with drying and cleanup.

Preparing for Future Water Emergencies

Identify all water shutoffs, including valves for individual sinks, toilets, and appliances. Ensure everyone in your home knows their locations and how to operate them. Keep necessary tools, like a water meter key and adjustable wrench, in a designated spot. Regular inspection of pipes and valves helps prevent emergencies from sudden plumbing failures.

  • Label each shutoff valve for sinks, toilets, and the water heater.
  • Store a water meter key and wrench in an accessible place.
  • Test your main shutoff valve once a year to ensure it works.
  • Show all household members how to operate the main valve.
  • Know the location of your water meter box at the curb.
  • Consider installing an automatic water shutoff device for major leaks.

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Frequently asked questions

What if my main shutoff valve is stuck or broken?

Do not force it, as you could break the pipe. Immediately go to the water meter box at the street and use a water meter key to turn off the curb stop valve. Then, call a plumber to repair or replace your indoor main shutoff valve.

Should I turn off the water for a small leak?

For a minor leak, you can often use the local shutoff valve on that fixture, like under a sink. If the leak is severe, spreading, or you cannot isolate it, shut off the main water supply. This prevents water from feeding the leak and causing more damage.

Does shutting off the water affect the hot water heater?

Yes. Turn off the power or gas to your water heater after shutting off the main water supply. An empty or low water heater that is still heating can damage the unit. Consult the manufacturer's instructions or a plumber for the correct procedure for your specific model.

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