toilet sizzles and hisses
A plumber replaced the toilet insides about 6 months ago, but lately we've noticed a "sizzling" or "hissing" sound coming from it. Sometimes this happens when we use a faucet or toilet in another room and sometimes we hear it in the middle of the night. I think it's coming from the fill valve. The water at the overflow is about a half inch from the top.
We began having problems a few months ago after two new homes tapped into the water supply which has not been tapped into since the development was built 12 years ago. Could pressure or debris be causing this problem? I hate to pay a plumber to come out again and we are not too handy.