A filter module for filtering a flow of fluid employs a base member (20) which either mounts a blanking plug (14) or a diverter valve module (60). The plug (14) is replaced by a diverter valve module (60) for use with those engines that require an auxiliary source of low pressure fuel. A solenoid valve is housed in the module (60). A pressure regulator valve positioned in the valve module (60) maintains a backpressure in the filter assembly (10) to insure that there is sufficient head to drive the flow of fuel to the engine.