Call APPLIANCE MECHANICS today at 425.212.9076 or Text 425.470.6059

How to Turn Off Your Main Water Supply

When dealing with appliances, basic training in electricity and plumbing is vital. Do you know where your main water valve is? Knowing this valuable source is essential to keeping your home safe.

Before a plumbing project, it is essential to know how to shut off the fixture’s water supply or the house’s primary water line. 

How to Find Your Main Water Supply Valve.

The main water shut-off valve is near the water meter. Some are inside homes, and some are located outside near the property line.

Your proper main supply valve’s location depends on your home’s construction and how it receives the plumbing.

There are different types of shut-off valves.

  • TSO valves (Top shut-off valves)
  • Lever (ball) shut-off valve

water valve

  • The wheel (gate) shut-off valve

Where is the Main Supply Valve Located in Your House?

  1. The proper main supply valve located outside your house is a TSO shut-off valve. It is in a pit near your property line, usually near the drive-way.


Water usage gauge and valve inside the pit.


Water main valve inside the pit.

  1. Other main water valve locations are in basements, crawl spaces, near a water heater, or slab-on-grade.

How to Shut off the Main Water Valve?

A shut off valve is turned off clockwise by hand or with a monkey wrench. The two-valve holes line up when the valve closes. The meter dial will stop spinning to indicate that the valve is entirely shut-off.

Valve control keys are available at hardware stores to make the turn off easier.

Reasons to Shut off the Main Water Valve.

  • Valve gets broken, damaged, or stuck
  • Pipe bursts
  • Ruptured line

There are several Youtube videos to help.

If there is an emergency that requires shutting off your water, call 911.

Don’t Panic. Call the Appliance Mechanic.

Appliance Mechanics offers quality, certified appliance services in Snohomish, Skagit, Island, and Northern King Counties. Our team consists of a combined 45 years in expert appliance mechanics. It is important to us that we respond to you quickly. We will find the problem, offer you a solution, and provide information for your components’ future maintenance.

Appliance Mechanics are not plumbers. Use the information on this website at your own risk. If you suspect a problem with your washing machine, refrigerator, dishwasher, or other appliances that use water, please contact us at (425) 212-9076.