N nutastr New member Joined Aug 4, 2007 Messages 11 Reaction score 0 Nov 13, 2007 #1 I have noticed that after the coffee returns south, there is a bubbling/gurgling that occurs. I assume this is caused by the remaining vacuum. I would like to know why and/or how this affects the end result.
I have noticed that after the coffee returns south, there is a bubbling/gurgling that occurs. I assume this is caused by the remaining vacuum. I would like to know why and/or how this affects the end result.
