Hi All,
I have a Shurflo Backpack and I wouldn't use anything else.
The key, I find to useing a Backpack efficiently is to set it up on your vehical so as you don't have to lift it and mess about pouring water in it when filling up.
I have mine mounted on the back of my trailer at about back hieght so as I can back up to it and don it effortlessly.
I also use a pump to transfer water from the barrels to fill it while it is mounted.
Now as for how long will a tank last. It depends on the setting you use. Shurflo has a button on the underneath which you press once for 1st setting twice for 2nd and so on to 4th setting then 5th time turns it off. Now I only use it on 1st setting for normal cleaning up to about 18 ft and at that setting mine lasts about 45 mins to an hour.
Put it this way - in a full day, about 6 - 7 hrs working, I will use 120 to 150 ltrs of water.
I find a backpack is best for me as I do mainly houses and not too big commercials. But I do find on the one big job I do (where I use 4 fillings!) it's a pain keep filling it up and a trolly or direct from tank would be better.
Iff you want to see how I have setup please feel free to E-Mail me at
david@salkeld95.freeserve.co.ukand I will send you a write up I did about my setup
David