The Case Construction FS19700 Fleetguard Spin-On Fuel & Water Separator is a spin-on fuel & water separator for Case IH agricultural equipment. It measures 107.95 millimeters across the outside diameter and 171 millimeters tall, with 7/8-14 UN-2B threads.

Water in diesel fuel causes corrosion inside injection pumps and injectors, promotes microbial growth in fuel tanks, and can cause catastrophic injector failure through hydrolock at the point of injection. The FS19700 combines free water separation and emulsified water removal in a single spin-on canister, replacing both contamination threats before they can reach the injection system.