When you drain your compressor there will still be water in the rubber line between the compressor and the dryer. If you mount the dryer just above the compressor with no "drip loop" in the rubber line the water in the rubber line will run back into the compressor tank where it can be drained.
I didn't dream that up by myself. The instructions for the first air compressor I bought in 1986 said to do it that way.
Good idea - thanks.
