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P550785

F/W SEPARATOR CARTRIDGE

This is a Donaldson fuel/water separator filter cartridge. It removes water droplets and solid contaminants from diesel fuel before they reach sensitive injection components, helping prevent injector and pump damage. The cellulose media is rated 99% efficient at 10 microns and removes 95% of emulsified water. You replace it on a regular service interval (typically every 10,000–15,000 miles) or whenever the water-in-fuel warning light comes on.