HD Filter FS20083 Fuel Water Separator-Key Features Effective Water Separation – Removes water and contaminants from diesel fuel. Enhanced Engine Reliability – Protects injectors and fuel pumps from corrosion and damage. OEM-Standard Filtration – Designed to meet OEM performance and durability requirements. Simple Installation – Direct-fit replacement for FS20083 and cross-references. Fleet-Proven Value – Cost-effective choice for heavy-duty applications.