I think the whale system is how I'm going. I have been through the attwood drill quite a few times. Even when they do work they jam up with hair and stuff... They don't pump all of the water so they have a little stink to them.
Lastly the charter boats in the BVI all seem to use a version of the whale pump so they must last!
Lastly the charter boats in the BVI all seem to use a version of the whale pump so they must last!