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Common Locations of the Main Water Shut-Off Valve

Where is my main water shut-off valve? This is a common question.

The basement, Meter Room, mechanical room, exterior wall, or yard are where the main water shut-off valves are usually installed. These places are generally suitable for maintenance personnel to find quickly or for centralized management. You can see the main water shut off valve in these places.

Types of Main Water Shut-Off Valves

There are two types of main water shut off valves: ゲートバルブ そして ボールバルブ

Gate valves are valves that need to be turned multiple times to close completely, and can more accurately control the flow of water.

しかし, gate valves may become hard to rotate after long periods of inactivity due to corrosion and sediment buildup.

Ball valves can be completely opened or closed by turning 90 degrees, which is simpler and faster to operate. It has a longer service life.

When the handle is parallel to the pipe, it is in the open state, and when the handle is perpendicular to the pipe, it is in the closed state.

How to Turn Off the Main Water Shut-Off Valve

Turn Off the Gate Valves: Clockwise rotation closes, and counterclockwise rotation opens. (Righty tightly, lefty loosely)

Turn Off the Ball Valves: The handle of a ball valve typically has a protrusion that prevents overly turning the valve and turning 90° only.

When to Turn Off the Main Water Shut-Off Valve

When a water pipe bursts or leaks, the water main shut off valve should be closed immediately. It will not only waste water, but also soak the floor and furniture, and even cause circuit breakage, causing huge losses.

When it is necessary to repair and replace pipes and water meters, the main water shut off valve should be closed in advance.

When you are not living for a long time, traveling for a short time, or on a business trip, you should close the main water shut-off valve to prevent water leakage while you are away.

In the cold winter, the pipes located outdoors may be frozen and cracked. Closing the valve and draining the remaining water in the pipe can prevent the pipe burst.

What to Do If You Can’t Find the Water Main Shut-Off Valve

In an emergency, if you cannot locate the main shut-off valve in your home, like when there is a leak in the water pipes at home.

First, you can turn on other faucets to reduce the water pressure at the leak point, making it easier to temporarily block the leak with clothes or towels.

Then you can call your local water utility, and contact the plumber who installed your pipes. Or ask your neighbors for assistance.