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Missing variables


Posted by tomh on June 16th, 2003 10:52 AM
In reply to Water pump by A. Hanes on June 16th, 2003 08:22 AM [Go to top of thread]

What is the pipe size and flow rate desired (gpm) or pressure head. My experience is that a 3/4 HP to 1.0 electric centrifugal pump is adequate for zoned irrigation given the lift you identify. If you don't use a submersible pump you must have a rigid intake (vacuum side) line with a footer valve and the pump must be primed initially. The outlet (pressure) side will be constant flow if you don't use pressure switches and flow tank. A pump dealer will perform your calculations at no cost and recommend appropriate equipment.

Or calculate yourself at:

http://www.hydraulica.net/toolbox/powercalcus.html

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