Where Is My Main Water Shutoff Valve? A Homeowner's Guide

Your home's main water shutoff valve controls the water supply entering the house. Depending on the home, it may be near the water meter, where the main water line enters the house, in a garage, utility area, basement, crawlspace, or exterior valve box. Do not wait for an emergency to find it.

Why Every Homeowner Needs to Know This

If a plumbing connection fails, knowing how to stop the water quickly can limit damage. Finding the main shutoff is one of the first things every homeowner should do after moving into a house.

Start at the Water Meter

The water meter can give you a clue about where the service enters the property. Follow the general direction between the meter and house and look for the point where the main water service enters the home.

Common Places to Look

Check the garage, basement, crawlspace, exterior wall, or utility area. Construction styles vary, so do not assume every valve near a plumbing fixture is the home's main shutoff.

Main vs. Local Shutoffs

Your home may also have individual shutoff valves for toilets, sinks, washing machines, dishwashers, water heaters, and exterior faucets. These isolate individual fixtures or branches, while the main shutoff controls most or all of the home's water supply.

DIY Pros Tip

Once you find the main shutoff, label it and show every responsible adult in the house where it is.

Test Before an Emergency

If the valve appears damaged, severely corroded, leaking, or has not been operated in many years, consider having a plumber inspect it rather than forcing it.

Your Homeowner Assignment

Find your main water shutoff, determine how it operates, make sure it is accessible, label it, and show your family where it is. Then use the FREE DIY Pros Home Maintenance Checklist to continue building your maintenance routine.