P550851 Donaldson Fuel Filter Water Separator Donaldson P550851 Fuel/Water Separators. Cross References: Baldwin PF7930 Carquest 96005 Fleetguard FS19765 Luber-Finer L9765FXL Napa TWD P550851 Wix WF10005 MSRP: Was: Now: $23.00 Add to Cart