Clever solutions! I live in Oregon where it rains occasionally so I also had trouble with water in my air lines, especially when painting. I discovered that when the compressed air leaves the gun nozzle that it expands and gets colder resulting in condensation. My solution was to fill about 3' of schedule 40 PVC pipe with reusable desiccant that I can remove by removing the pipe caps on the PVC. The desiccant can then be rejuvenated by placing on a cookie sheet in an oven at 175 degrees F for approximately 30 minutes. I also use a HF "final filter" at the gun just in case.
