Hi Janet.This noise could be a couple of different things.My guess is it’s either the angle stop valve supplying the toilet or the fill valve in the toilet tank.Try turning the angle stop valve supplying the toilet slightly and see if the sound ch.gsenaSee if it is open all the way. Just do me a favor and keep writing such <a href="http://kvbioyry.com">trhcneant</a> analyses, OK?