Compressor water separator: The main problem with pneumatic tools is the drainage system. The water separator has a built-in button drain valve for easy cleaning. Just press the release valve to drain the remaining water, oil and dirt. Wide range of applications: They are standard 1/4 inch inlet and outlet, so they are suitable for most pneumatic tools, easy to use, used as a spray gun, air compressor filter dryer for sanding and cutting, suitable for plasma The cutting air filter is a special filter for plasma cutting machine and other compressed air.