ive got a 750l layflat in a swb 2900 115 trafic, the tank is placed over the rear wheels a foot away fromt he back doors leaving plenty of room to use the slidng door foor hose reelwhen i swap my vans over later i will post a picture for you
most window days I probably use bout 500 - 600 litres a day . sometimes only 300. depends on the day / round. very soft water here so i just keep topping up or connecting to amy svailable tap . Pressure washer is run from same tank so that is connevted to water supply and left to fill. 650 is a lot of weight to lug around I'm being tight thinking of mpg !!