XWS-3002 – Our New more efficient Extreme Water Separator is rated @ 2 microns absolute. The reason our water separator no longer has a drain is because the filter element itself traps the water.PF-3001- New Particulate Filter is rated @ 144 microns.The 144 Micron Particulate Filter on the suction side will drastically reduce cavitationIncrease flow propertiesLower the sound output of the FASS System, and removes larger fuel particulates.