ewan, it is good that you have come up with a solution, i would be crazy if i thought i was the only one to be working on this problem, i love to see other members especialy a w/c coming up with a great idea, i am working on a professional product that folk can buy of the shelf, most would rather buy than do diy methods, hopfully this product will meet that criteria, early days yet but i am very confident, why did you not share this before ewan, all i have seen posted regular is dirt on the pole hose on all the forums,