Where is my main water shut-off valve?

Concerns & risks

A pipe bursts under the sink and water sprays everywhere. You realize you have no idea where to turn the water off.

If a pipe bursts, every minute of searching means more water damage.

Causes & evidence

Homes have a main valve where the water line enters the building, plus a utility valve at the meter.

What to do

1. Look where the water line enters: basement wall facing the street, garage, utility room or under the kitchen sink in some homes.
2. Warm climates: often outside near the foundation or in a box near the street.
3. Apartments: check near the water heater or ask the building manager.
4. Found it? Tag it with a bright label and test that it turns.

Common mistakes: Many people find the shutoff for the first time during an emergency. Find it now and label it. Test it gently, since old valves can stick. Make sure everyone in the house knows where it is.

Speed Man tip: Stuck or crumbly old valve? Don't force it. Have a plumber replace it before an emergency.

Wrap-up: The main valve is where the water line enters the home. Common spots: basement, garage, utility room, outside wall. Label it and test it today.

Want the why behind it? Read Household Water Leaks and the Water Meter Test in the wiki.