I’m looking for some help researching how to clean long tubes, such as maybe 1/4 inch pickup tubes for a water pump that may be 20 feet long. I’ve been able to find hydration bladder cleaning kits that allow for cleaning the first 2 or 3 feet of these tubes, but beyond some sort of high pressure/high flow system with high caustic cleaning solutions, I haven’t found a good way to swab out a long tube.
If you can angle the tube and open both ends, would a weighted string attached to a brush work? If you’re worried about it getting stuck inside due to blockage, attach two weighted strings to it but only send one through and let the other hang out from the end you stick the brush through.