Ensures dry air to paint gun, air tool; removes particulates to 40 microns. Moisture Separator assures dry air to your paint gun, to help you achieve a perfect paint job Moisture Separator removes moisture from the air line, ensuring dry air to your paint gun or air tool, and removes particulates down to 40 microns. Avoid contaminants that can ruin paint jobs and equipment. Handles up to 100 cfm at 150 psi, 1/2" NPT threads.