Hiring a professional plumber to fix a toilet tank can be expensive, but with a little bit of knowledge and the right tools, you can save money and tackle the job yourself. One important component of a toilet tank is the fill valve, which regulates the flow of water into the tank. The fill valve is typically controlled by a mechanism called a ballcock or a float valve, which triggers the valve to open or close when the water level in the tank reaches a certain level.
Drain the tank: Flush the toilet to drain as much water as possible from the tank.
By following these steps, you should be able to fix the most common issues with a toilet tank. However, if you are unsure of what to do or if the problem persists, it may be best to call a professional plumber for assistance.