Use a cloth or towel to dry up any remaining water before disconnecting the water supply to the tank with a set of channel locks. Take out the old flush valve by disconnecting the flapper and removing the tank-to-bowl bolts.
Carefully lift the tank off of the toilet so that you can access the toilet-to-bowl gasket and loosen the flush valve nut. Consider having a partner to help make this process easier. Install the new flush valve, tighten the flush valve nut, and replace the tank-to-bowl gasket. Carefully put the tank back into place and reinstall the tank-to-bowl hardware. Reconnect the water supply to the toilet and turn the water back on. Check for any leaks at the base of the tank to avoid accidental water damage.
Flush the toilet to test the new flush valve and then verify that the toilet stops running with the new part installed by allowing the toilet to fill up.
If the water keeps running, then the tank-to-bowl gasket or the flapper may not be properly installed. The fill valve controls the flow of water into the tank from the main water supply. It's designed to continue filling the toilet until the float arm or float cup reaches the set level, but a broken valve may continue running non-stop or may even turn on and turn off inconsistently.
The excess water flows into the overflow tube, preventing the tank from overflowing, but the toilet will keep running.
To verify whether the issue is the fill valve, remove the top of the toilet tank and check the set water level, as well as the height of the overflow tube. If the overflow tube is an appropriate height for the toilet and the water level is set to about an inch below the top of the overflow tube, but the water continuously flows into the overflow tube, then the problem is the fill valve. Replacing the fill valve isn't as difficult as replacing the flush valve, though you will still need a set of channel locks and a cloth, towel, or sponge.
Start the replacement by turning the water off to the toilet with the isolation valve on the water inlet line, then drain the tank by flushing the toilet. Soak up the excess water with a cloth, towel, or sponge to make sure the tank is dry before removing the water supply line with a set of channel locks.
Take the old fill valve out by unscrewing the locking nut on the bottom of the tank and pulling the fill valve assembly out of the tank.
Place the old fill valve in a sink or bucket to catch any excess water. Adjust the height of the new fill valve to suit the specific toilet tank and the desired water level, then insert the threaded end of the valve into the bottom of the tank. Secure it to the tank with a locking nut to create a watertight seal. Reconnect the water supply, then turn the water back on. If the flush valve is the issue, the fault is almost certainly due to the lack of a watertight seal via the main washer.
Replacing the washer or even simply refitting it upside-down should solve the problem. This content is blocked. Accept cookies to view the content. DIY Plumbing supports the information, tips and guides you need with advertising.
We strive to show you only the ads we think you might be interested in. To do this, the website uses cookies. By clicking I agree, you agree to the use of cookies. DIY Plumbing. Why is my toilet constantly running? What happens next is they're generally wondering what the problem could be and start to jiggle the flush valve to see if that fixes anything but the running water noise never stops A running toilet left unrepaired can leak approximately a gallon an hour.
The stats tell us that's 26 gallons a day or a whopping gallons a month! For the most part, staring at it and shaking the flush valve won't fix anything. Luckily, there are a few straightforward things you can do to fix your constantly running toilet and reduce your water usage.
The first step in troubleshooting any problem is determining the cause, and then acting accordingly to stop a running toilet. Blog Table of Contents. Why does my toilet keep running? How to Fix a Running Toilet. Lowering the Float Valve. Replace the Toilet Flapper.
Shorten the Refill Tube. Get Expert Plumbing Help! Float Height needs adjusting. Toilet Flapper is leaking and needs replacing. The fill tube needs shortening. This is a DIY article though we strongly advise that you contact your local plumber to inspect the situation. You shouldn't let a running toilet keep running, you could be wasting hundreds of gallons a day, running up your water bill. There could also be other issues with your toilet that may need more in-depth repair and maintenance.
However, that doesn't mean that you can't inspect your own toilet and figure out if it's an easy fix. So without further ado, here are some things that you can do yourself to get your running toilet back to its regular operation.
Don't overtighten. If the leak doesn't stop, you need to replace the washer. Empty the tank and sponge out the water in the bottom. Loosen and remove each bolt and replace the rubber washer between the head and the bottom of the tank.
Tighten the bolts and turn the water back on. If you see water seeping from a hairline crack on the tank, replace the tank or the entire toilet. You can't repair such leaks. If you can't find a leak anywhere, the toilet fill valve may be defective. This doesn't happen often and can be remedied by replacing the valve.
Chris Deziel has a bachelor's degree in physics and a master's degree in humanities.
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