if you get a trigger you ll have a loop of hose at the bottom of the pole.itll drive your nuts!i used to use aqua-daptors but broke 2 in the space of a few months(screw threads snapped off!)so i binned them.
i now use a little pole hose tap at the top of the pole just before the brush.you cant turn the water off when extending or collapsing the pole but its still handy for ground floor work.i lose a bit of water.maybe 20L a day but im not bothered(i have a 500L tank).i turn the water off between windows by kinking the hose at the bottom of the pole when extended.
Funny that, on ground floor work the aquadapter is brilliant for turning the water off
Also I dont view the aquadapter as a water saving device anymore as I have a 650 ltr tank
I like to turn the water off on top Windows to brush sills and stop dripping
A tap at the top of the pole has never appealed to me, except that its lighter.