really cheap trick I use - I leave the petcock at the bottom of the tank juuuust cracked opened enough to hear it hissing, and I do the same with one on the separator.. this allows water to drip out instead of following the air line to your tools. Older Ingersoll-Rand upright - as in circa 1990, silly trick, works like a charm. I admit it doesn't get it all if I am running the compressor a lot, but for short stints (say less than 3hrs) I do not get water in the line at the tool. If condensation is a problem where you are, you should always purge your compressor when you're done for the day.. it's amazing how much water will spill out.
