Well had handyman friend replace the main valve with a ball valve yesterday. Glad I had someone who knew what to do.
Thought we had won the battle as I did not hear any hum from faucet water; however, this AM in the quiet, flushed BA toilet and the finish of the refill was accomplished with 'the hum'. Last May/June new toilet 'guts' installed.
Is it going to be appropriate to start trying to change out faucet washers now?
Confused, but hopeful!!!