when I get my van will need the tank waterproofing and van RO/DI etc I spoke to a guy today who got his van all fitted out with his gear for a good price with these guys- Industrial Cleaning Supplies UK | Cheap Cleaning Equipment from The Cleaning Warehouse Good place to go? I will take little boy in van sometimes so need tank put in safely maybe 400 litres. Don't want to do it myself ! Might as well get RO and DI fitted on board so I can just plug it in. Although where I live will be difficult to leave a hose plugged in all night with me not in van at the time (as I live in flat and can't have hose trailing across the road all night! but I guess having the option of either using twin DI for speed or RO if possible would be great.