Primary Image1: With a basin positioned below the fuel/water drain plug, remove fuel/water drain plug and drain until fuel stops. Note: Dispose of fuel properly. Use a 6mm allen wrench to loosen plug (Or better yet - get an upgraded drain plug) Also - it is a VERY good idea to get some wax paper or aluminum foil and place it under and behind the HFCM. Shape it to direct the flow of fuel where you want it. It also helps keep the new filter clean when you insert it.