How Do I Fix a Running Toilet?

A running toilet can waste up to 200 gallons of water per day, significantly increasing your water bill. Fortunately, the problem is usually caused by one of a few common issues inside the tank that are relatively easy to diagnose.

The most frequent cause is a worn or warped flapper valve. The flapper sits at the bottom of the tank and creates a seal that holds water until you flush. Over time, the rubber deteriorates, allowing water to continuously leak from the tank into the bowl. Replacing the flapper is inexpensive and often solves the problem immediately.

If the flapper is in good condition, check the fill valve. A malfunctioning fill valve can cause water to run continuously because the tank never reaches the proper level to trigger the shutoff. Adjusting the float arm or replacing the fill valve assembly typically resolves this issue.

The overflow tube is another component to inspect. If the water level in the tank rises above the top of the overflow tube, water will drain constantly. Adjusting the float to lower the water level should stop the overflow.

While these repairs are manageable for handy homeowners, persistent running or unusual noises may indicate a deeper issue like a cracked tank or a problem with the supply line. In these cases, a professional assessment is the safest route. Agent Rooter offers fast, affordable toilet repair services throughout Los Angeles with no hidden fees.