If your toilet is making a vibrating sound around the wall whenever the toilet is flushed the problem usually has to do with the fill valve. More specifically, the diaphragm gasket inside the fill valve can wear down, lose elasticity, and harden. … Perhaps your toilet is noisy because it is running constantly.
Keeping this in view, what to do if toilet keeps making noise?
A toilet making an air noise or a whistling or hissing sound is a sign that the fill valve is not closing and sealing properly, and air or water is leaking from the fill valve. If the fill valve isn’t closing properly, begin by replacing it. If this doesn’t solve your problem, call a plumbing professional.