Ben,
I'd be very well pleased with a set up doing 3gpm. But what pumps are there that can push a real 3gpm through a system? Little Giant # ? , Iwaki # ? or any others?
A pump that can give a real 3gpm would have a much higher rate at 0 head. So I'm unsure what pump would be needed to drive a 3gpm set up.
Not as much a cost consideration here as where the line is on gain vs gone to far.
That is not to say that when I buy a pump I won't consider the cost, I will. But would really hate to discover to late that the money spent bought a pump that crossed beyond the point of gain while costing me more.
My best guess (and that is all it is, a guess) would be that a Iwaki md-30 rlzt would be the upper limit in that companys line if it isn't over the line it's self.
Just plain unsure on this part of a strong, but proper, system.:shrug: My choice of a rad (single pass 2-342) has turned out better than I hoped for. And I'm confidant I understand what I should get in way of blocks. But don't want to screw up in my pump choice.
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