Chris, I followed that same line of thinking with a Mag 5 and 1/2" pipe going up
to the tank, and I had slow flow. I'm no physics-whiz, but I'm betting on the
smaller 1/2" (or 3/4" on the Mag 9.5 and up) inlet and outlet being a way to
really move the water quickly through the pump.

After all, we want good flow, not spa jets.

Marc


Chris wrote:

But doesn't a thicker water column mean your producing more head? from what
i'm reading your suggestion to potentially double the ouput pipe size. is
the pump has a 1/2 inch output shouldn't you use that all the way up?

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