3 Ways to Shut Off Your Toilet’s Water Supply

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Master plumber Dave Jones walks through where to find and use water shutoff valves

Co-authored by Dave Jones and Hunter Rising

Last Updated: April 1, 2026 Fact Checked

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Turning Off Fixture Water Supply Valve

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Turning Off Main Water Supply

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Alternate Method

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FAQs

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Toilet Repair Resources

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Video

If you’re trying to fix something wrong with your toilet, the first step for most repairs is turning off the fixture’s water supply. While most toilets have an individual valve to turn off the fixture, older toilets may require you to turn off the main water supply in your home. We spoke with plumbers and home improvement specialists to share their advice on locating and operating the water shutoff valves in your home so you can stop potential leaks and perform the maintenance you need.

How to Cut Off Water to a Toilet

Master plumber Dave Jones recommends looking for the water supply valve behind or underneath your toilet and turning it clockwise. Newer ball valves only require a quarter-turn to shut off the water, but older gate-style valves require several turns before they completely close.

Section 1 of 5:

Turning Off Water with a Toilet Shutoff Valve

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Locate the shutoff valve attached to the pipe behind your toilet. Professional plumber David Balkan explains that “basically every plumbing fixture has their own dedicated valves.”^{[1]
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Expert Source

David Balkan
Professional Plumber & CEO of Balkan Sewer & Water Main

Expert Interview} The toilet’s shutoff valve is usually behind the fixture, and it looks like a football-shaped metal handle that connects a pipe on the wall to the bottom of your toilet’s tank.
- Some older toilets don’t have shutoff valves behind them. If this is the case for you, then shut off the main water supply or use the alternate method without turning off water.
Meet the wikiHow Experts

Dave Jones is a Master Plumber and the Midwest Regional Vice President at Roto-Rooter Plumbing and Water Cleanup.

Patrick Johns is a home improvement specialist and owner of CatchAll Handyman Services, with 28 years of experience.

David Balkan is a Professional Plumber and the CEO of Balkan Sewer & Water Main based in New York City.

James Schuelke is a Professional Plumber and the co-owner of Twin Home Experts based in Los Angeles, CA.
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Turn the valve clockwise until it can’t turn anymore. Jones says that turning the valve to the right, or clockwise, shuts off the water supply to your toilet. He notes, “If it’s an older style gate valve, it will require several turns before it closes. If it’s a quarter-turn ball valve, it only requires turning the valve one quarter of a turn.”^{[2]
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Dave Jones
Master Plumber, Roto-Rooter Plumbing & Water Cleanup

Expert Interview}
- If the toilet water supply valve is stuck or broken, home improvement specialist Patrick Johns suggests using a pair of pliers to gently loosen the handle. Just be careful not to apply too much pressure, as this could snap the stem.^{[3]
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  Patrick Johns
  Home Improvement Specialist
  
  Expert Interview}
- If the water valve looks rusty or is difficult to turn, try applying some WD-40 to it.
- If you’re still unable to turn the valve, Johns says to shut off the main water valve for the entire house. Then, look into replacing the faulty valve.^{[4]
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  Patrick Johns
  Home Improvement Specialist
  
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EXPERT TIP

James Schuelke
Professional Plumber
James Schuelke, along with his twin brother David, is the co-owner of the Twin Home Experts, a licensed plumbing, leak detection, and mold inspection company based in Los Angeles, California. James has over 32 years of home service and business plumbing experience and has expanded the Twin Home Experts to Phoenix, Arizona and the Pacific Northwest.

James Schuelke
Professional Plumber

Make sure to shut the valve securely. When the valve is off, give it an extra quarter-turn to the right to make sure the water is completely off.

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Flush your toilet to make sure the water is turned off. If the water supply is turned off, the water in the back tank will empty into the toilet bowl and not refill afterwards. If your toilet is clogged, you can also test if the water has been turned off by pushing down on the float lever in the tank. This is the lever attached to the ball-shaped float in the tank. If the water supply is turned off correctly, then no more water will enter the tank.
- If the water is still turned on and running into your toilet tank, then check to make sure the valve is completely turned. If it is, then use one of the other methods to shut off your water.
After you’ve done repairs or want to turn your water back on, simply turn the water valve counterclockwise as far as you can. You’ll hear your toilet running as water fills back into your tank. Give the toilet a flush to test it and make sure the water is turned back on.^{[5]
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Section 2 of 5:

Turning Off Your Home’s Main Water Supply

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Shut off the main supply if the toilet’s valve is stuck or broken. If the toilet’s valve won’t turn or you’re unable to move it, don’t try to force it because you may damage the pipes. Instead, use your home’s main shutoff valve to turn the water off to all the fixtures in your home.
- Keep in mind that you won’t be able to use any faucets, showers, or water heaters while you have the main supply valve turned off.
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Look for the valve in the basement if you live in a colder climate. In colder areas where freezing temperatures are more common, the water meter and main shutoff valve are typically located indoors. Jones explains, “If your home has a basement, you’ll likely find the main water shutoff valve on a basement wall facing the front of your house. On slab homes, the valve is often hidden from view inside a closet or wall access panel near the front of the house.”^{[6]
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Dave Jones
Master Plumber, Roto-Rooter Plumbing & Water Cleanup

Expert Interview}
- If you can’t find your water meter and valve in these typical locations, your best bet is to contact a professional plumber to have them locate your meter for you.
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Check outside to find the valve if you live in a warmer climate. Jones continues, “In hot climates, the shutoff valve is often mounted outdoors on the front of your house. However, most homes also have a shutoff valve inside a meter vault buried in the front yard.”^{[7]
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Dave Jones
Master Plumber, Roto-Rooter Plumbing & Water Cleanup

Expert Interview} Check the side of your home or look for the lid to the underground box located somewhere on your property.
- The main shutoff valve will have 1 or 2 “wheel” or lever handles jutting above or next to a metal pipe. They will probably be on either side of a water meter.
- If you have an external water heater on the side of your home, there’s a good chance the water meter will be somewhere nearby.
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Turn the valve clockwise to shut off your main water supply. This will stop all the water flowing into your home, including the water supply to the toilet. Balkan notes that if there are 2 valves on either side of the water meter, turn the one that is closest to your home rather than the one closest to the street. He warns that if the main valve breaks, there isn’t a way to replace or repair it on your own.^{[8]
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David Balkan
Professional Plumber & CEO of Balkan Sewer & Water Main

Expert Interview}
- When you’re finished with your work or repairs, simply turn this valve counterclockwise again to turn the water back on.

Section 3 of 5:

How to Stop a Toilet from Filling without Turning off Water

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Take the lid off the tank and locate the float near the top. The float is usually a ball-shaped piece floating on top of the water. When you flush the toilet, the float falls with the water level and opens the water valve to refill the tank. When the water level raises the float and reaches a certain height, the valve stops letting water into the tank.^{[9]
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- To prevent water from refilling the tank, Johns says you need to hold the float arm up to trick the fill valve into thinking the tank is full, which stops the flow of water.^{[10]
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Slip a narrow length of wood under the float lever to hold it up. For best results, use a piece of wood that is about 1 inch (2.5 cm) shorter than the height of the tank. Position a piece of wood vertically so that the end rests on the bottom of the tank. This way, the top of the wood will hold the float lever up and prevent the tank from refilling after a flush.^{[11]
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- If the sides of the tank are too high to do this, Johns suggests placing a board or stick across the top of the tank to secure the float arm in the “up” position.^{[12]
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- As another alternative, Johns says to use a piece of string to hold the float arm in the “up” position.^{[13]
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  Patrick Johns
  Home Improvement Specialist
  
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- If you don’t have a piece of wood, anything that’s tall and sturdy enough to hold up the float lever can be used in this method, as long as it’s waterproof.
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Flush the toilet to drain the water out of the tank. The tank will empty while the wood or wire holds up the float arm, so the valve won’t open or refill the tank.^{[14]
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- If your toilet is clogged and you can’t flush it, use a bucket or tall cup to lift the water out of the tank until it’s empty.
After you’re finished repairing your toilet, simply remove the board or strapping to allow the float to refill the tank. Place the lid back on the tank, and you’re good to go!^{[15]
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Section 4 of 5:

Toilet Water Supply FAQs

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Can you flush your toilet when the water supply is turned off? Schuelke notes that it’s absolutely safe and okay to flush your toilet after turning off the fixture or main water supply.^{[16]
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James Schuelke
Professional Plumber

Expert Interview} Flushing after you turn the water supply off empties the tank and removes any excess water still in your toilet, so it can help you access parts for repairs.
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How long can you leave a toilet’s water supply turned off? It’s usually safe to leave your water supply off for up to a few days or a few weeks for longer repairs. Just keep in mind that water won’t come out when you try flushing your toilet while you have the supply turned off.
- Some plumbers warn that leaving your toilet’s water supply off for weeks or months at a time could cause sewer gases to travel up your pipes or cause the seals to dry out.^{[17]
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Can you replace a damaged water supply valve? If your toilet’s water valve is stuck or leaking, replacing it is important to prevent any further issues. Typically, installing new water supply valves is as simple as removing the old one and screwing the new one onto the pipe. However, if you have trouble or don’t feel comfortable working on it, contact your local plumber to make the simple repair.

Section 5 of 5:

Additional Resources for Toilet Repairs

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Follow our repair guides to get your toilet working properly again. Turning off your toilet’s water supply is typically the first step required for troubleshooting issues and making repairs. We’ve got tons of expert-backed resources, so check out these pages to help bring your toilet back to working order.