Find & Test Your Main Water Shutoff Valve
Every homeowner must know where the main water shutoff is. A 1-inch pipe releases 650+ gallons per hour — locate and test your valve today.
Your main shutoff is typically: (1) where the water line enters your home — often in the basement, crawl space, or utility room; (2) at the water meter near the street; or (3) in a meter box at the property line.
Test the valve annually by turning it off and checking that water stops at all fixtures. Stuck valves are common — apply penetrating oil and use two wrenches if needed. Tag the valve location for all household members.
Smart shutoff valves can close automatically when leaks are detected — see our smart leak detection guide for whole-home options.
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Frequently Asked Questions
Where is my main water shutoff?
Usually where the main line enters the house (basement/utility room), at the water meter, or in a curb box at the street. Check your home inspection report.
How do I turn off water to my whole house?
Turn the main valve clockwise (righty-tighty). For gate valves, turn until tight. For ball valves, turn 90° so the handle is perpendicular to the pipe.
Who do I call right now for water damage?
Call (888) 840-6512. The line is answered 24 hours a day, seven days a week, and connects you with an IICRC-certified water damage restoration company that serves your area. Describe what you can see — where the water is coming from, how long it has been there, and whether it smells — the more specific you are, the faster the right company is on the line.
If the source is a pipe or an appliance, shut the main water valve first. Have four things ready and the call goes quickly: the address, when the water started, what is wet now, and whether you have filed an insurance claim.
Still not sure which of these is your situation? (888) 840-6512 · toll-free · answered 24/7