Asked on Dec 24, 2012
Recently, our upstairs bathroom sink hot water faucet/plumbing makes repeated rapid noises when turned on. Not everytime. First thought it was water hammering, but it is not a loud banging noise. May be air in the water line, but I can't figure how air got into the line and why has it just started? Bathroom was renovated three years ago and these noises started about two weeks ago. Any ideas? Thanks and Merry Christmas.