The FASS WS-1001 Water Separator Filter has a recommended change interval of 15,000 to 30.000 miles. Regular draining of this Fleetguard FS1001 filter element helps insure the life of the filter and prevent freeze ups in the colder temperatures.
KLM Performance recommends keeping a spare set of the FASS 150 Replacement Filters in your truck at all times. Having an additional set of filters onboard will save you a lot of time and trouble when you get a bad load of fuel. The WS-1001 Water Separator Filter has now been replaced with the new and improved FS1001 Fuel Water Separator manufactured by Fleetguard.
This Fleetguard FS-1001 Water Separator is the FASS 150 Series Replacement Filter, which is an upgraded Fuel Water Separator. The FS-1001 filter ensures the removal of entrained and emulsified water from your diesel fuel.
KLM Performance recommends that you change your FASS Lift Pump filters on a regualr intervasl to promote optimum engine effiency.