10.17 Performance data for a pump are

Estimate the delivery when the pump is used to move water between two open reservoirs through 1200 ft of 12-in.-diameter commercial steel pipe containing two 90 elbows and an open gate valve with an elevation increase of 50 ft. Determine the gate valve loss coefficient needed to reduce the volume flow rate by half.

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(ft) 179 176 165 145 119 84 43 Q (gpm) 0 500 1000 1500 2000 2500 3000