Best of all, you can remove an old ballcock valve and install a new fill valve in under 10 minutes. Here’s how: Close the shutoff valve to stop the flow of water to the toilet.

Most people are reluctant to take on any job that involves fiddling with water-supply pipes, and because toilets perform such unsavory work, people are doubly hesitant to risk trying to fix them. I… ...

It's also sometimes called a ballcock. To test to see if your fill valve is functioning normally, remove the lid from your tank and flush your toilet. Look to see if water is leaking from any part ...

The valve may not be closing fully and shimmering on the water causing the noise. This is a common problem with a ballcock and is usually a relatively low-cost repair.