This 3/8" NPT Milton micro filter is supplied with pre-assembled automatic overnight drain, which will operate when an air supply is shut down or when liquid has gathered in the filter bowl. The included 3 stage baffle system offers exceptional moisture renewal. This micro filter includes a porous bronze 40 micron filter element which allows fewer pressure drops and longer cleaning intervals. Micro filters remove harmful water or oil condensate, pipe scale, dirt and rust from compressed air systems and are used as pre-filters to coalescing type filters to ensure high efficiency and long element life. This polycarbonate bowl has a bowl capacity of 5 ounces and is protected by a safety metal bowl guard. Maximum of 150 PSI and 48 SCFM.