Description Fleetguard FS53014 is an Elemax NanoNet stacked spin-on fuel/water separator element and pre-fuel filter for FH239 Series Industrial Pro housings. It is a 5 micron primary fuel filter with outside-in flow for heavy-duty diesel applications. Typical installations include Cummins Industrial Pro housings such as FH23901 and related models, DAVCO 69001 systems, and selected Mack and Volvo equipment. Cross-references include Baldwin PF46079, Cummins 4328043 and Hitachi YA00035941.