How to Shut Off the Water Supply

How to turn off the water supply to sinks, toilets, and other plumbing fixtures in your home

Turn off water to sinks and toilets at the small valve beneath them. Off is clockwise.LightWaveMedia / Shutterstock.com

Turn off water to sinks and toilets at the small valve beneath them. Off is clockwise.

When a home’s water supply system leaks or a repair to one of the plumbing fixtures is needed, you’ll have to shut off the water. It’s best to do this at the valve that’s closest to the problem. That way, the rest of the house will still have a functioning water supply.

Shut Off Plumbing Fixtures

Most water-using fixtures and appliances have some type of shut-off valve that allows you to stop the water supply at the fixture without shutting off the water to the entire house.

Lever valve controls supply to water heater. Note the red main supply valve in the background.©HomeTips

Lever valve controls supply to water heater. Note the red main supply valve in the background.

 

To shut off a faucet, toilet, or similar fixture, first look for a stop valve that’s connected to the water supply tubes, located directly under the fixture. This is normally a chrome-plated or plastic valve. Beneath a sink, one serves hot water and one serves cold.

Turn the handle clockwise to shut off a valve. If it is too difficult to turn by hand, try wearing a work glove or gripping the handle with a pair of slip-joint pliers.

 

 

To shut off a water heater, turn off the cold water valve above the water heater.

washing machine fill©HomeTips

Lever-type washing machine shutoff valves.

To shut off the water supply to a washing machine, just turn off the valve behind the machine. Some washers have simple lever-style valves like the one shown here.

Be sure the house's water shutoff valve is completely open.©Don Vandervort, HomeTips

The house’s water shutoff valve is usually located just outside (or, in climates where freezing is a problem—inside) an exterior wall.

 

 

 

 

Shut Off Water to the Entire House

If you don’t find a shutoff valve near a fixture, you can shut off the valve that controls the flow of water to the entire house, normally located near where the cold water pipe enters (the valve will be outside in warm climates, inside in cold climates). In some cases, the valve is located on a pipe right before the water heater and may have a red handle. To turn it off, rotate the handle clockwise.

Shut Off Water to Your Property

To turn off the water to your house and the rest of your property (including outdoor sprinkler systems, hose bibbs, and so forth), look for the main valve just to the house side of your water meter. This is normally out by the street, often in a concrete box just below ground level.

Once you locate the valve handle, turn it clockwise until it stops. If it is frozen in position, put a few drops of lubricating oil around the valve stem and wear a work glove to turn the handle or, if necessary, turn it with the help of a pipe wrench.

©Don Vandervort, HomeTips

The main water shutoff valve us usually located near the water meter. This should shut off water to your entire property.

This valve should always be completely open or completely closed—never to control the amount of flow into the house.

 

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Join the Conversation

  • Don Vandervort, HomeTips

    Gary, unless you drain all pipes that run through unheated areas, shutting off the main isn’t going to help prevent freezing—though it could prevent pipes that otherwise would be under pressure from bursting. Allowing faucets connected to vulnerable pipes to drool water does the same thing. Check out this guide on preventing pipes from freezing: http://goo.gl/7FwQmr

  • David Straub

    I have a VERY old type shut off valve that is in the basement, right before the meter.(line that comes into house) It has a “T” shaped flange coming out of the top of the valve and is oriented with the flow. There is a flat flange with a hole in it at the base of the “T” flange, so that when the valve is in the off position, you can put a lock on it. This valve will not budge. Is there something I can put on this valve to loosen it up? I am afraid to put too much torque on it. Any suggestions?

  • Wendy Webster

    Where does the water supply come from for an outside toilet. The pipes are old. I’ve turned off the stopcock, but the pin hole is below this, the cistern is now empty. Do I have to turn off anything inside the house or outside the property to stop the leak enough to repair the pinhole leak?

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