FX4 F2-Fifty
New member
i don't understand why you would want two filters. Just run the smaller micron filter and be done with it...it'll filter both the small and large particles at once. I'm only running one 3 micron filter....that's it. If you run more that one....start with the larger one first then the smaller. That's how the stock system is. The one at the bowl on the factory setup is 4 micron i believe.
Pre pump to catch debris/separate water before it gets into your pump, post pump to catch the smaller stuff, and possibly any debris that the pump creates (bad pump). Two filters are cheap compared to injectors.
IMO 10 micron pre pump might restrict it if it's a large pump.
I would want something to filter any large particles before the pump plus you'll get alot longer service life out of the filters.
This, Not all filters are created equal, even if they cross reference. Check the flow rates, etc.
I just figured it would alleviate one filter from having to do the job of 2 filters. That way one is purely a water separator and the other is for debris, etc.
Seems like a good plan. Hard part is finding a place post pump for the 2 mic filter.