About 6 years ago, I replaced all the galvanized pipe in our house with copper. I also dismantled an old brass laundry-tub faucet (BBW 450), cleaned it in CLR, and replaced the washers. I also had to put on an anti-siphon device per code. Since that time, the faucets (both H and C) screech like an elephant at low-to-intermediate flow rates. (They don't screech at very low rates or with a robust stream).

This hasn't really been a problem for me for the past 6 years. (How often do you really use your laundry-tub faucet?) However, I am in the middle of a kitchen renovation, and this has now become my primary sink. It is starting to drive me bonkers! (Not that I had far to go.... ;-)

Any ideas of what is causing this or how to mitigate?

Thanks!

A_D