What pressure must be maintained just upstream of nozzle

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A fire hose nozzle has a diameter of According to some fire codes, the nozzle must be capable of delivering at least 300 gal/min. If the nozzle is attached to a 3-in.-diameter hose, what pressure must be maintained just upstream of the nozzle to deliver this volumetric flow rate?

Reference no: EM131240877

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