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Why Is My Toilet Running?

Is there anything quite as annoying as waking up in the middle of the night to the sound of a running toilet? If your toilet is running at random intervals or just won’t stop running, you have more than just an annoyance- you have a money issue. A slow leaking toilet uses up to 30 gallons of water a day, while a medium link can use up to 250 gallons a day. That can result in quite an increase in your water bill.

Fortunately, most issues with running toilets are fairly easy fixes. It is best to contact a professional plumber to evaluate your leak and fix it properly. Most running toilets are caused by one of four things.


One of the first things you should check if your toilet keeps running is the flapper. When the toilet is flushed, the flapper allows the water out of the tank and into the toilet bowl. It then closes, and the tank refills.

If the flapper does not properly seal, water will continue to flow into the bowl and the tank will continue to fill. Check the chain length and make sure it isn’t too long and getting caught underneath the flapper. You may need to replace an old flapper that has deteriorated and no longer forms a seal.

Fill Valve

A fill valve controls how much water goes in and out through the flapper. If it becomes clogged with debris, it will not function correctly. You may also have a faulty fill valve or an old deteriorated fill valve that leaks.

Water Level

If the fill valve float is not working as it should, the water level in your tank will be in a constant state of fill and release. Check the float to make sure it is not stuck. You also may need to adjust the float to reach the proper water level to stop the toilet from running.


If your handle is not operating properly, it can also result in a toilet that keeps running longer than it should. Check to make sure it connects properly to the flapper and that the handle is screwed in tightly.

A toilet that won’t stop running can also be a symptom of a bigger problem. If you have issues with your home’s plumbing, you need to call a professional plumber to stop the leak. Contact us today, and one of our trained technicians will have it fixed in no time.