Wow, haven't been on this forum in over a year! Too busy building trailers
Anyways, yes the tanks and the water system are definitely "potable". The confusion may come from discussing my personal methods and camping habits. I, personally, do not use the on-board water for drinking. Main reason is that I am horrible with remembering to empty my tanks when I park my trailer between trips. I don't like the taste of tap water that has been sitting for a month or two. I use my on-board water for cooking, cleaning and washing dirt off my feet/face (not usually in that order, LOL).
Hope this clears up any confusion. Back to building trailers!
Gabe