93mm / 3.54″ dia. x 1″-14

Donaldson’s 93mm x 1″-14 family of spin-on fuel assemblies features two head options and a range of filter lengths with various efficiency ratings to protect your fuel system and address today’s fuel challenges. Choose the media type and drain valve configuration that’s best for your application. Whether you are looking for high-efficiency particulate removal or fuel and water separation, the options are available for your needs. 


Wide applicability and flexibility for on- and off-road applications


For water maintenance flexibility, Donaldson fuel filter water separators have a connection that can accommodate multiple drain valve types, as well as a water collection bowl. The clear water collection bowl (80ml capacity) is a separate component that can be added on for easy, visual water inspection and maintenance. A variety of other Twist&Drain valves options are available so you can configure the exact system needed.

Easy to service, no special tools needed – removing and replacing spin-on filters is hassle free. By using field proven designs, Donaldson is able to offer robust, leak free performance while avoiding the need for specialized tools.

Wide range of efficiency ratings – you can rely on Donaldson’s advanced filtration technology to provide the performance needed

Mix and match system of in-stock heads and filters – create the system to fit your needs


Side mount, single port heads

7/8″-14 UNF2B ports (2x)

½”-14 NPTF ports (2x)

Spin-on filters

B20 compatible – a wide range of fuel compatibility, including biodiesel up to B20, allows for use with most modern fuel chemistries

Twist&Drain™ valves minimise components – provides flexible options that make routine maintenance clean, easy, and efficient. Twist&Drain™ valve include:

Standard drain

Drain valve for Deutsch water-in-fuel (WIF) sensor

Drain valve for 1/2″-20 UNF threaded port sensor

Add-on water collection bowl available for easy water inspection

Available Media Types

Treated cellulose


Donaldson’s exclusive Synteq™ synthetic

Wire mesh

More Filtration

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Bulk Fuel & Lube
Cabin Air

Make Largo your first choice when looking for a leading supplier of filtration