Just sorted through my kit and put together some ideas. I was thinking of feeding direct from the outside tap going into dosatron chemical injector then a propane water heater into the WFP.Does hot water make a difference?Been noticing con roofs over the last weeks and they look simple.....apart from the one that have a hip roof where one side comes down against the side of the house to a valley or gutter ( as in Eds photo above) how do you clean that side?