Matt,What type of ro unit have you got?I was going to get a van mounted ro system, but now I'm thinking of getting a static ro. All my work is within 9 miles of home so its no problem coming home to have something to eat and fill up.Thinking of cheap 200gall ro- man system or this from gapswater.Which would you buy?I estamite I will use between 1000-1200 ltrs a day for me and the lad.Nel. Price: £553.19 £650.00 (Including: VAT at 17.5%) http://www.gapswater.co.uk/acatalog/Reverse_osmosis_kits.html