WIX HD Fuel Water separator filters feature an enhanced cellulose silicone treated media or a new generation full synthetic media that provides excellent contaminant holding capacity for super clean fuel and water removal. High strength, corrosion resistant cans, center tubes, and end caps with superior sealing components ensure a leak resistant, long lasting, high performing fuel water separator filter. Some models feature a water drain port with a threaded plug or patented self-venting drain valve for efficient water purging as needed.