Fuel Pump Pre-Filters

check out this question & answer from another forum:

Question:
What is the difference between a pre and post filter?
Is it plausible to use a pre filter as a post filter?
or is the pressure drop too much? or is it filter size related (to large/small)?

Thanks in advanced
Choco

Answer:
A prefilter makes a great post filter as long as the micron rating is small enough. Our 40 micron filters work great as post filters.

In general, a prefilter is overkill when used as a post filter. A filter placed before a pump must be a lot freer flowing than a post filter because it is on the vacuum side. A post filter is on the pressure side and need not flow as freely to achieve the same number of gallons per hour.

RobbMc

George,

I agree I think the filter should be after when the pump is pumping, not when its pulling. But I still think a screen for large particles before would save some lives !! LOL

All I am saying is that for those who want to run a pre-filter, a properly engineered pre-filter is now available.

RobbMc's answer to the question explains why a normal fuel filter, designed for the discharge of the fuel pump, is not a good filter to use as a pre-filter.

George