The FS19947 is a fuel water separator filter designed primarily for diesel engines to ensure clean fuel delivery by removing both solid particulates and water contamination from the fuel supply. It is widely used in heavy-duty trucks, buses, agricultural, and industrial equipment, especially those with International/Navistar diesel engines. Key Features: Type: Fuel/Water Separator Filter Primary Use: Removes water and contaminants from diesel fuel Construction: Spin-on or cartridge-type design with high-efficiency media Micron Rating: Typically 5 to 20 microns (varies slightly by brand equivalent) Water Drain Plug: Integrated (in most variants) to easily remove collected water Gasket Material: Nitrile or similar diesel-compatible rubber High Capacity Media: Designed to support longer service intervals and high-volume fuel flow Applications: International/Navistar DT466, DT466E, MaxxForce engines Functions: Fuel Filtration: Removes dirt, rust, and solid contaminants. Water Separation: Prevents water from reaching the engine by collecting it at the bottom of the filter. Drain Option: Some versions include a bottom drain valve to release accumulated water. Engine Protection: Helps prevent injector damage, rough running, and poor fuel economy. Medium and heavy-duty trucks Diesel-powered off-road machinery Construction and agricultural equipment School buses and delivery vehicles