Test Water Shutoff Valves

Locate and exercise your home's water shut-off valves so you can stop water quickly during emergencies and so valves don't seize from disuse.

Why it matters#

When a pipe bursts or fixture starts flooding, you need to stop the water NOW—not spend 20 minutes searching for a valve that's painted shut or rusted in place. Water pours out at about 650 gallons per hour from a burst pipe. Knowing your shut-offs and keeping them working can save you from catastrophic water damage averaging $6,000+ per incident.

What you'll need#

Tools#

• Flashlight
• Adjustable wrench (if needed)
• Masking tape and marker for labels

Steps#

1. Find your main water shut-off#

Look in the basement, crawl space, or utility area near where the water line enters your home. In warm climates, it may be outside near the water meter. The main shut-off is typically a round wheel handle (gate valve) or a lever (ball valve).

2. Test the main shut-off#

Turn on a faucet somewhere in the house. Then close the main valve: turn the wheel clockwise until it stops (gate valve) or rotate the lever 90 degrees so it's perpendicular to the pipe (ball valve). Water should stop flowing from the faucet. Open the valve back up.

3. Locate fixture shut-offs#

Find the individual valves under every sink, behind every toilet, behind the dishwasher, and behind the washing machine. Most look like small oval or football-shaped handles.

4. Test each fixture valve#

For each valve: turn the handle clockwise until it stops (don't force it), then turn the fixture on to verify water is stopped. Turn the valve back on (counterclockwise) and verify flow returns.

5. Label your valves#

Use masking tape or hang tags to label each valve with what it controls and which direction is OFF. During an emergency, you won't want to guess.

6. Show your household#

Walk family members through the main shut-off location. Everyone old enough should know where it is and how to use it. Post the location near your breaker panel or water heater.

Pro tips#

• Exercise valves every year—turn them off and on to prevent seizing; valves that sit for years without moving often won't budge when you need them
• Ball valves (lever handles) are more reliable than gate valves (wheel handles); if your main is an old gate valve, consider having a plumber upgrade it
• Before leaving for vacation, test your main shut-off—if a leak happens while you're gone, damage is catastrophic

Warnings#

• If a valve is stuck, don't force it with too much pressure—you can break the handle or valve. Try gentle heat from a hair dryer and work it gradually
• If you have a well, know where to shut off the well pump—located at the electrical panel or a dedicated switch

When to call a pro#

Call a plumber if any valve is seized and won't move with gentle effort, if a valve leaks when you turn it, if valves are too corroded to trust, or if you need to replace an old gate valve with a modern ball valve. A plumber can also add shut-offs where they're missing, making future emergencies easier to handle.