Wanted to share my Hill Mk4 pump set up, two inline gas filters from Wal Mart, clear plastic tubing from Lows, couple packs of desiccant to fill the filters and lines, use small hose clamps for filters and to attach hose to brass inlet filter on desiccant housing, when filling gun put the end of hose deep in a freezer, chest type works best, (I read this some where, wasn't my idea). Used this setup some months now, when bleeding during filling or bleed off when complete I have never seen ANY water expelled, even in this humid time of year!!! I've been using hand pumps over 14 years I'm sold on this. Resealed a Mk4, ( after 3 years hard use never touched it ) not to bad to work on if you have the tools, there very well built, had problems, 
springy handle both directions, contacted Hill Pumps in England by Email, I read somewhere Hill has great customer service, they had me "sorted" in two Emails. I didn't replace an o ring I thought was ok, #18 on the Mk4 IPB. A big thumbs up to Hill pumps really helped me.
