Fuelab 85801-4 Series High-Flow In-Line Fuel Filter with Integrated Check Valve Micron Long Length - 858 10

The Fuelab 85801-4 is a high-flow, long-length in-line fuel filter from the 858 Series, featuring an integrated check valve that keeps your fuel system pressurized after engine and pump shutdown. By combining the filter and check valve into a single unit, the check valve assembly is fully protected by the filter housing — eliminating the need for extra fittings or separate components.

Constructed from billet aluminum with a military-grade Type II anodized finish (MIL-A-8625), this filter is built for durability and precision. Machined internal radii minimize pressure drop across the filter, while the compact design supports flow rates up to 200 GPH with a 200 PSIG maximum pressure rating.

Key Features:

• Integrated check valve maintains fuel pressure after engine and pump shutdown
• Check valve helps prevent vapor buildup in fuel rails during engine cooling
• 10-micron replaceable fabric (cellulose paper) element — 5-inch long length for increased filtration capacity
• -8AN male inlet and outlet with AN 37° flared fitting end caps for direct connection to fuel system components
• Billet aluminum housing with anodized finish per military spec MIL-A-8625, Type II
• Supports up to 200 GPH flow rate
• 200 PSIG maximum pressure rating
• Compatible with gasoline and diesel fuels
• Replaceable filter element for reduced long-term maintenance costs
• Includes low-profile saddle clamp mounting bracket
• Backed by a limited lifetime warranty

The 85801-4 is ideal for high-performance fuel system builds requiring reliable post-shutdown pressure retention. The replaceable cellulose element is the most economical and widely used option, providing excellent filtration in a disposable format.