Brad.. it isn't very clear as to what he wants to do here.. I was assuming that he wanted to blow into the pressure tube because that's where I would blow into if I suspected a blockage, which I was thinking he was trying to fix but he talks about an air leak.. so I'm not sure what he wants to try to fix here.

Your point is well taken and is a great suggestion. I hope he understands what we are trying to describe in our replies.

CGr.