Subject: Fuel transfer/polishing pump
From: "Len Krauss"

Second step is to, while polishing, agitate fuel at bottom of tank using a
small L-shaped air discharge pushed down to tank bottom on a rod or dowel
and turned about as much as possible. Obviously the fuel furthest away from
the discharge will get the least agitation and baffles will reduce degree of
agitation for sure. But with the L-shaped discharge at the bottom and
turned, disturbance will flow through baffle bottom notches. The basic idea
is to get crud in suspension and moving so it can be captured by the
polishing pick up and filtered out.

If you're going to bother to do this I would spray clean fuel out of the nozzle
at high pressure not air. That might get the bottoms of a couple of the
adjacent baffles stirred up a bit.
Some companies use a soft tube on the end of the wand that flops around as the
fuel comes out to further aid in the agitation. Or so they claim.
And you can get a longer soft tube into the tank through the fill than you can
an "L" bend.


Capt. Bill