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Pro Tip: How to Turn off Your Main Water Valve


Where is the main water shut off valve? Why might you need to use it? Let's uncover the mystery in this month's Pro Tip. Whether you have sewage backing up or need to fix a pipe, it’s important to know how to turn off the main water valve, as well as locate it.

Why Would I Need To Shut Off This Valve?

There are multiple reasons as to why you would need shut off the main water valve. Such instances would include:

For other damaging instances and assistance, check out our sewer and drain repair services.

Uh… Where Even Is My Main Water Valve?

Depending on where the problem is, the first step is to try to cut off the water near the source. Some typical areas could be under the sink, behind the clothes washer and against the wall under the toilet.

Next, you’ll have to find the main water valve. Unfortunately, each house is different so there isn’t just one location. Some of those locations could be:

  • In the basement:

    The shut-off valve is typically found near the front foundation wall.
  • In the crawlspace with a basement:

    In this case, the valve is where water enters the basement. If your home is older, it may be in the crawlspace.
  • In the crawlspace with no basement:

    Anywhere in your house is a possibility, but it would most likely be near the water heater or under the kitchen sink.
  • A part of the slab-on-grade construction:

    This could be in the garage, near the water heater or under the kitchen.

Make It Stop! How Do I Shut Off The Valve?

Once you find the valve, you have two choices of how to shut it off: 1) simply the turning of the handle clockwise or 2) contacting the water company and then using a wrench to turn the valve clockwise.

By learning how to locate the main water valve and how to shut it off yourself, you will be saving hundreds of dollars and protecting your house from further damage while waiting for a plumber. Remember, if you are ever unsure, contact a Superior Drain expert today!