Yesterday I saw the water of my toilet kept running. The gap at the arrow did not close.
May I know what should I buy to fix it?
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It only takes a minute to sign up.Sign up to join this community
First, clean the base of your toilet tank and, with a soft cloth, the underside of the existing flapper. Don't worry, that's clean water.
Second, if after cleaning you don't get a good seal, then what you want is a "toilet flapper".
Such as this example.