Mike, nice to hear from a fresh source. You have said, albeit a little better than I did in the post I linked above, what I was trying to convey. You seem to know your sh**, um stuff Just to clarify your point for others who might read this, bumping will drop the pressure some but not take it back to 'baseline' or the clean psi, when it stops dropping the pressure more than 3psi, it's time to do what I linked in my previous post as the de is pretty much 'full'. Welcome to the forum