KSPRICE@aol.com wrote:

Kenny,

Don't think it should really matter, although if I was going to split
hairs it seems like having the return fuel shooting out (or oozing,
depending on volume of flow and size of orifice) in the vicinity the
bottom of the tank might stir up a bit of crud.  Which would be good,
assuming the system ran long enough to digest it.  In the real world,
however, I suspect the crud would quickly form into little sandbars
where the fuel stream wasn't and it would be irrelevant.  Having some
sort of agitator going in the tank while polishing would seem to be a
good idea, though.

Regards,

Ken Phelps

"Application denied.  One cannot fertilize with flatus."
-Abraham Lincoln, on rejecting homeopathic medications for the
dispensary of the US troops.

For the polishing system to work best, you need to circulate all of the tank
contents through the polishing system.  That is best done if the supply and
return connections into the tank are as far apart as possible.  The best
compromise is to return to the top of the tank through the normal engine
return  line.  If the return from the polishing system is near its supply,
you will likely get a short circuit and polish only part of the fuel.

CaptnWil

to the top of the tank?  Is that important (as opposed to returning it to
the bottom of the tank)?