How to Adjust Your Toilet’s Water Level
Is the water in your toilet tank sitting too high or too low? You may be able to fix it with a quick adjustment to the fill valve.
A toilet needs the right amount of water in the tank to flush properly. Too little water can lead to a weak flush, while too much can cause water to run into the overflow tube and waste water.
Here’s how to check and adjust it.
What You’ll Need
Usually, you won’t need much. Depending on your toilet, you may need:
Carefully remove the lid from the top of the toilet tank and set it somewhere out of the way.
Look inside the tank and check where the water is sitting. Many toilets have a water-level line marked inside the tank. If yours does, that’s the easiest way to tell where the water should be.
If there isn’t a marked line, the water should generally sit about an inch below the top of the overflow tube.
The fill valve is the part inside the tank that lets water in after you flush.
Look for an adjustment screw, clip, or dial on the fill valve. The exact setup will depend on the type of fill valve your toilet has.
If the water level is too low, adjust the fill valve so it allows more water into the tank.
If the water level is too high, adjust it in the other direction to lower the amount of water entering the tank.
Make a small adjustment first. You can always adjust it again if needed.
Flush the toilet and let the tank fill back up.
Check the water level again. If it still isn’t where it should be, make another small adjustment and repeat the process.
You want enough water in the tank for a good flush, but you don’t want water constantly running into the overflow tube.
What If Your Toilet Is Still Running?
If your toilet keeps running after you’ve adjusted the water level, the water level may not be the problem.
A worn-out flapper is a common cause of a toilet that won’t stop running. The fill valve or another part inside the tank could also be the culprit.
If you can hear water running even when the toilet hasn’t been flushed, it’s worth taking a closer look.
When Should You Call a Plumber?
Not every toilet problem is a DIY fix. Give a plumber a call if:
A simple water-level adjustment can take care of a minor problem, but if the issue keeps coming back, there may be something else going on.
The Bottom Line
Adjusting your toilet’s water level is a pretty simple job on most toilets. Start by checking the water level in the tank, make a small adjustment to the fill valve, and flush the toilet to see if it helped.
If your toilet is still running or isn’t flushing properly after adjusting the water level, there may be another issue that needs attention. A worn or damaged part may need to be repaired or replaced. If you need help, contact us today or learn more about our plumbing services.