A discharge of 500 gpm of water flows through 300 ft of 6 in steel pipe at a temperature of 100°F. The pipe contains two 6 in steel elbows, two fully open gate valves, and a swing check valve. If the...

A discharge of 500 gpm of water flows through 300 ft of 6 in steel pipe at a temperature of 100°F. The pipe contains two 6 in steel elbows, two fully open gate valves, and a swing check valve. If the discharge end of the pipe is located 20 ft higher than the entrance, what is the pressure difference between the two ends of the pipe?