Fuel filter and water separators that make maintenance easy Regardless of how carefully fuel is handled, dirt and water manage to find their way into your tank. A fuel filter/ water separator traps contaminates before they damage injectors and other sensitive engine parts. For almost 50 years, Racor has been a leading force in removing harmful debris and water from fuels. The 400 Series fuel filter/water separators share a compact design and can be engine mounted or mounted to a bulkhead. Each 409MAM10 assembly includes a corrosion resisting powder coated cast aluminum mount head, 10 micron filter element, and bowl. Each Spin-On element features Aquabloc which removes nearly 100% of the water by repelling moisture and directing it downward into the bowl where it can be drained safely with larger particulates through a 1/8" drain plug. Deep pleats in the filter media trap debris and help to extended service life. Filter element bodies are easy to grip for removal and installation. We recommend having spares aboard in preparation for unexpected clogs caused by tainted fuel from the dock or tank debris and algae stirred up by rough seas.