LWC i used the backpack today and was surprised how little water it used on a certain house,i used it on setting 1 but in my opinion setting 2 is better.I used 14ltrs to do a 4 bed house which really surprised me,at a guess i would have said that i normally use 50ltrs from the vanmount it just shows on some jobs how little water is needed.I checked after and results were spot on,on setting 1 i found that it wasn`t really enough to get a decent flow upstairs at only 15-20ft,but setting 2 was ideal.