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<grin> Thank you for your amusing reply valveman! <grin> I am the first to admit that I DON'T know pumps. (Thus my original question.) After pondering the question for a while it seems to me that reducing a pump's output flow with a valve on the output side is equivalent to moving up and to...

Can a pump's output flow rate be reduced by inserting a valve at the pump's outlet? Specifically, I am talking about a centrifugal submersible pump, and about inserting a globe or gate valve at the pump's outlet. I have been given both yes and no answers to this question by people whose...