of inlet valve 20 a filter outlet selector 77 which controls the positioning of outlet valve 28 and pressure gage 42 as shown in fig2 bleed valve 48 is attached to conduit 43 b housing 60 further comprises an on off switch 70 which can activate deactivate boost pump 36 not shown housing 60 also comprises annunciators comprising a check filter indicator 71 and an indicator that boost pump 36 not shown is on off 73 an exemplary application of the multiple filter controller as disclosed herein is depicted in fig5 fig5 depicts an exemplary fuel system comprising multiple filter controller 10 in line downstream from a fuel tank 72 and in line upstream from a fuel pump 74 a secondary filter 76 and an injector pump 78 in this embodiment fuel pump 74 pumps fuel from fuel tank 72 such that the fuel enters at least one of filters 12 and 16 the fuel then enters the remainder of multiple filter controller 10 as disclosed above exits multiple filter controller 10 through outlet 50 and proceeds to flow through fuel pump 74 secondary filter 76 and fuel injector pump 78 via respective conduits 80 and 82 although fig5 depicts a fuel tank 72 depending on the use of the multiple filter controller fuel tank 72 may instead comprise for example an engine oil sump transmission sump or other source of fluid used with an internal combustion engine similarly fuel pump 74 may be an oil pump transmission fluid pump or other pump associated with an engine or vehicle system the system being the receiver of the conditioned fluid in an exemplary application of fuel system 20 valves 20 and 28 are positioned to allow the fuel to pass through filter 12 fuel pump 74 suctions the fuel from fuel.