I just had a hot water heater replaced, I tried just replacing the thermal coupler as suggested on this site. (It was a nice try!) Anyway, all of my faucets are flowing fine except for one lavatory sink. When I first turned the hot water to this faucet on the water was "rusty" a little air came through the line and then the flow went to a trickle. It is this way now for both the hot and cold water.