Usually use a trigger, but as you may be aware sometimes a trigger can be a little awkward. Found it strange when doing bottom windows as the end of the pole is not so accessible but discovered you can turn it on and off manually at the brush head. Doh! As for the price I got in there early so got a bargain. I would rather it was cheaper but lets face it if it makes your working day that little bit easier its worth splashing out a little.
Original post: http://www.window-tools.com/windows/water-fed-poles/aqua-dapter/msg81887/#msg81887
