I normally use a phoenix hybrid pole with a vikan brush. Recently I bought a SLX-35 with a Medium mixed dual brush. This normally only gets used once every couple of days and then goes back into the van in readiness for the next really high job. Today I decided to use it all day even though it is a little cumbersome for all day use and I flew through my work. All finished and home by 2pm. When I went to refill the tank I was shocked to note that I still had about 200ltrs of water on board. So,.......has the wife been slipping something in my tea to make me work faster, or could it be that the pole/brush combination has had an impact?