On Nov 19, 3:28*pm, "Roger Long" wrote:
Two meter troll wrote:
four filters. two sets paired with a y valve so you can run through
one or the other in the set. it would save you changing out filters in
bad weather (which IME is when filters clog up) or while running.

That would certainly increase redundancy but, so would a third set of
filters. It has to end somewhere on a 32 foot boat.

The reason filters clog up in bad weather is because the motion of the boat
stirs up the stuff that's been sitting in the bottom of the tank. *The whole
point of the polishing system is to remove that stuff before you get into
bad weather. *Before bad weather or going into a spot where power is vital,
it would be good to take a peek at the filter gauges to see if they show any
restriction. *This would be an especially good thing to do with a new load
of fuel.

With the high capacity of the Shelco filter, it's pretty unlikely I'll be
changing elements underway.

--
Roger Long
IME the fuel polishing only works for stuff suspendid in normal
conditions; I have never seen a tank that didnt have stuff in the
bottom that only got into the filters in really bad conditions.
As you say. Me I like redundancy when I can get it.

Two meter troll wrote:

IME the fuel polishing only works for stuff suspendid in normal
conditions; I have never seen a tank that didnt have stuff in the
bottom that only got into the filters in really bad conditions.
As you say. Me I like redundancy when I can get it.

You have to remember that the polishing pump is drawing at 20 - 30 times the
rate of the normal fuel pump. That makes it much more effective at sucking
stuff up out of the bottom of the tank. With my retrofitted system, both
engine and polishing flow are drawn through the same suction. I actually
can't draw a tank quite as low with the polishing system running as I can
with just the engine drawing because it sucks air down about an inch and
into the intake.

--
Roger Long

On Nov 19, 7:28*pm, "Roger Long" wrote:
Two meter troll wrote:
IME the fuel polishing only works for stuff suspendid in normal
conditions; I have never seen a tank that didnt have stuff in the
bottom that only got into the filters in really bad conditions.
As you say. Me I like redundancy when I can get it.

You have to remember that the polishing pump is drawing at 20 - 30 times the
rate of the normal fuel pump. *That makes it much more effective at sucking
stuff up out of the bottom of the tank. *With my retrofitted system, both
engine and polishing flow are drawn through the same suction. *I actually
can't draw a tank quite as low with the polishing system running as I can
with just the engine drawing because it sucks air down about an inch and
into the intake.

--
Roger Long

Roger I do understand that and i work in an industry where fuel
polishing is SOP because we are out in it all the time. i made the
suggestion because the redundancy to me is paramount and i never ever
trust one system when i can have a backup. I am in no way knocking
your system