I was thinking more along the lines of the tank that holds the flushing water...but I guess all "fresh" water could be held in 1 large tank on a ship? (seems like a diff distaster waiting to happen to me and again I'm deff no engineer or ship designer, was just a thought) =)

if I knew fresh water was surrounded by sewage water but kept seperate by a bladder and the crew were all drinking it then yes I'd drink it too esp if I had no other choice.