Lots of good advice thanks,got a good idea what i have to get,one other question what size ro unit and and di unit do i need for a 500lt a day set up. not sure static or van mount yet,it would be the same units,Please tell me if i am wrong. I think static may be best for me,and also i could stock UP extra water over a weekend as back up for the week ahead,or is this wrong. Any advice would be great. THANKS ps the Protecta-kote kit didnt turn up, due wednesday fair enough i think silly time to order,want to order all the rest this week xmas/new year out the way now. Hope everyone had a good time over xmas/new year. THANKS AGAIN.