[Blackhawk]

I actually turned off my angle stop a few days ago just to keep my kids from using the hot side. I just opened it back up and now the knocking is gone. I tried opening the angle stop 1/2, 3/4, and full and never got the noise. I am leaving it at 3/4 where I still get nearly full flow and see what happens over the next few days. It will probably come back, but who knows.

If it comes back, I will take the angle stop apart and see if I can find anything there.