Problem
Water slowly leaks from the tank into the toilet bowl between flushes.
Possible Causes
Worn flapper valve
Debris on the flush seal
Improper flapper alignment
Aging toilet components
How To Fix It
Turn off the water supply
Inspect the flapper valve
Clean the flush seal
Adjust the chain length if necessary
When To Call A Professional
If the leak continues after replacing the flapper, the flush valve assembly may need replacement.