Morning all. Doing some van home work this morning. I'm looking at getting a PureH20 Hard water system (RO -DI) unit. I was thinking of going for 500L unit as in the catalogue it says that will give me 4-6 hours of "Working hours" the payload required for 500L (again according to the catalogue) is 1,000kg. Now. I was hoping to sort myself out a Transit connect or a Volkswagen Caddy. Looking at the weight guides for a standard connect it's around 625kg But then I saw this http://www.ebay.co.uk/itm/Window-cl...omeGarden_CLV_Cleaning_CA&hash=item3ce9a79d8c This lads got a 650L tank? Is it because its a different system? Or because its a high roof long wheel base van? Or am I looking at this wrong? On another note could I get away with a smaller unit? I'd plan to be out all day 9-3/4pm once established. So dont want to get the point where i'm running out of water?