Intro: A running toilet wastes water and money, but the fix is usually simple.
1. Check the flapper valve
If it’s worn, water keeps flowing.
2. Adjust the float
If it’s too high, water overflows internally.
3. Check the fill valve
Debris can stop it shutting off.
4. When to call a plumber
If the mechanism is cracked or old.
Summary: Most running toilets are caused by worn flappers or incorrect float levels.