Thought some of you guys might be interested in this. We are having all kinds of rain/flooding in Central NJ. OK, so the Church, my FT job, has 30 foot high gutters. Well, Im too old and its too hard to get up on a ladder and try to run a hose down the clogged spouts so I tried this. I have a 3,500 psi pressure washer, and I had bought this neat drain cleaner thing, which is a 3/8 hose with a sewer cleaner head. The head is about ¾ in diameter with 3 holes facing backwards. There is so much water force that it pushes the head forward into the clog, while the water pushing backwards flushes away the debris.
So, I drilled a hole in the side of all the downspouts and put the cleaner in the spout facing upwards, fired up the pressure washer and damn if the thing didnt climb right up the spout and out the top, cleaning everything. Man, what a time saver