Update your semi with pure and clean burning fuel, with the Fleetguard FS20121 Spin-On Fuel / Water Separator Cartridge that ensures you're Ready for the Road Ahead™. Due to its ability to filter out both water and contaminants, this replacement device is the ideal solution to ensure combustion chambers only burn clean fuel. Fashioned to help maintain consistent fuel flow and injection, leading to a smoother running engine. FleetPride is your First Click in Heavy Duty®.