Racor® Fuel Systems

Donaldson replacement filters for Racor® Fuel Systems give you the most options – choose Twist&Drain™ or OEM style filters. Durable and rugged, our replacement filters provide the flexibility to choose the system that you prefer.


  • Complete coverage for on- and off-road vehicles with Racor® Fuel Systems
  • NOT for use in marine applications


  • High performance filtration – performs as well as OE filters
  • Many filters use high efficiency Synteq media for fine particulate removal and longer filter life

Twist&Drain™ Style Fuel Filters


  • Easy to service – wide grip drain valve profile
  • High performance filtration – performs as well as OE filters
  • Self-venting drain – water removal is tool-free
  • Accepts existing OEM water-in-fuel (WIF) sensors
  • Optional water collection bowl for quick visual water inspection

     Twist&Drain™ Filter Kits

  • We offer Twist&Drain™ conversions kits which contain all the components you need to change over to a Donaldson fuel filter water separating system. Kits include a Twist&Drain filter with standard valve, water collection bowl and alternative valve with WIF sensor or threaded port.

OEM Style Fuel Filters


  • Re-use your existing OEM style water collection bowl
  • High performance filtration – performs as well as OE filters
  • Features Donaldson Synteq media technology
  • Accepts existing OEM water-in-fuel (WIF) sensors 
  • Replacement water collection bowls available
Racor® is a registered trademark of Parker Hannifin Corporation.
This servicing information is provided as a best practices guide. It is not intended to replace or supersede the service instructions supplied by your engine or equipment manufacturer.

Spin-on Fuel Filter Water Separator (FFWS)

1.    Disconnect Water-In-Fuel (WIF) sensor if present – reconnect after servicing.

2.    Unscrew and remove the old filter and gasket.

3.    Properly dispose of the used filter according to local regulations.

4.    Wipe filter head with a clean cloth.

5.    Fill with fuel on the dirty side of the filter – per engine manufacturer recommendations.

6.    Apply a thin film of clean motor oil to the gasket.

7.    Align threads; spin filter on until gasket contact.

8.    Follow icons on filter to tighten to tighten the appropriate amount.

9.    Replace water collection bowl gasket if applicable.

10.   Prime fuel system per manufacturer instructions.

11.   Start engine and check for leaks.

12.   Drain water daily.

Donaldson Twist&Drain™ Fuel Filter Conversion Kit

Each kit contains all the components you need to change over to a Donaldson Twist&Drain fuel filter water separating system -- with coverage for over 400 on- and off-road vehicle applications.