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Maybe this has been asked.....but I see some pics of systems with and some without a fuel filter before the pump. I'd be afraid of pump damage due to debris w/o a filter before the pump...then to the vette reg/filter (or just reg. or filter, or nothing) behind the pump. With a new tank one might get lucky, but with an old fuel tank...look out!
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Running a pre-filter is fine, but because of the amount of pressure we run (pressure actually being suction when before the pump) there is a tendency for pre-filters not to have a large enough pass-through and cause restrictions. You can get a large-mesh pre filter to keep rust or in-tank garbage from getting to your pump, although most fine debris that would get in a tank would pass through the impellers on the pump and do no real damage.
You'd have to have something the size of a BB or so to actually damage the impeller.