heres a guide for a primative version that somone sent me, exactly the same idea though!
1. Buy a pack of John Guest 22mm pipe inserts from B&Q - about £3 for 5 - Photo1
2. Slide out the No.1 section from a Gardiner (or most other brand poles) pole
3. Wrap tape around the stem of this fitting until it is a tight fit in the base of section 1 - Photo2 and 3
4. Slide a length of pole hose (either PU or PVC) through section 1 and exit through the new fitting at the base
5. Fit a Rectus male fitting to the base of the pole hose, ensuring that the clip is as close to the male fitting as possible - Photo 4 - Then push this tightly into the John Guest fitting as shown
6. At the top end of section 1 fit whichever gooseneck you want to use and then pull the pole hose as tight as possible out of the top of the gooseneck
7. Holding the pole hose tightly just above the gooseneck to stop it pulling back in, cut the pole hose above where you are holding it and push-fit on an 8mm-8mm straight connector with red locking clip already fitted to the pole hose
8. Let go of the pole hose and it will pull the 8mm-8mm fitting tight back against the gooseneck opening- Photo 5
9. Slide the No.1 section back down into the pole
10. Connect your brush to the gooseneck and then connect the Brush T to the gooseneck connector with a short length of hose - Photo 6
11. Remove the end cap from your pole and cut out a much larger hole with a sharp knife. There needs to be enough of a lip for the cap to stay in position on the base - Photo7 & 8
12. In use, connect the female coupling of the hose pack to the base of the pole, extend and use the pole - photo 9 & 9.1
13. When finished with the pole disconnect the female coupling by pulling back the collar and put the pole away
14. The complete kit of parts needed (most you should have already) - photo attached
This will take about 10 minutes at most to do