Find your home's main water shutoff valve: a step-by-step guide

Why locate your main water shutoff valve?

A main water shutoff valve is crucial for controlling water flow in your home, especially during repairs, maintenance, or emergencies like leaks. Knowing its location and operation ensures you can manage unexpected leaks while waiting for professional assistance or purchasing repair parts.

Common main shutoff valve locations

Valves are usually found inside the home, but can also be outside in warmer climates. Most common locations include:

• Basement or crawlspace
• Near the water heater or laundry room
• Exterior wall
• In the yard (rare)

Gate vs. ball valves

Residential homes use gate and ball valves for main water shutoffs. Gate valves have a circular handle, while ball valves feature a lever.

How to find the main shutoff valve

1. Track visible pipes in the basement or crawlspace.
2. Follow the cold water supply line to the main water line.
3. Locate the water meter (if outdoors) and check downstream.
4. Inspect interior or exterior walls for pipes.
5. Look for an access panel in the yard (if applicable).
6. Consult your property inspection report (if available).

What to do if you can't find the valve

If you can't locate the valve, contact your local water department for assistance. They may shut off the water at the curb stop, allowing you or a plumber to install a main shutoff valve.