It takes air that has be vaporized to travel 36 feet before it condenses back to a liquid. If you mount your water trap right off these little compressors you well have a huge water problem.
The way to get around this is to coil a 50ft hose from the air compressor into a 5 gal bucket of cold water, put a little ice in. Attach your water filter to the end of the hose as it comes out of the bucket, then attach your spray line to the water trap. By the time the air gets to the trap, it has condensed back to a liquid and your trap will work very well.
I`ve done custom painting for many years and know this works for sure.