Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.
Check the water level in the toilet tank. Is it over the top of the overflow pipe?
Ok then you'll need to replace the fill valve and the flapper in the toilet. The best option for a new fill valve is a Fluidmaster 400. They are inexpensive, reliable and widely available. It also comes with good instructions.