Harris pole from b &Q a hose lock sprayer with hose from b&Q some 5mm tubing from guess where, a drill and jobs a gooden.
I will try and do a vid so show others when I can, if you want to see the most part look on you tube for: water fed pole under £30
you can see a bit, just add the hand pump sprayer and the connections with it, reply if you need help after you try and I will help you out.
it is easy
Ian
p.s I use this every week and have done for long time now.