My toilet will run for like 5 seconds about every 3 minutes does anybody know what I can do ? Or what's causing it?

my toilet will run for like 5 seconds about every 3 minutes does anybody know what I can do ? Or what's causing it?

99.5% odds Flapper valve needs replaced.

Take your hand and run it around the flat side of the flapper. If you feel rough or wavy edges you have a bad flapper the you should replace. Good luck, Tom

take your hand and run it around the flat side of the flapper. If you feel rough or wavy edges you have a bad flapper the you should replace. Good luck, tom thanks ill try that