19. The inlet line of a pump is 4-nominal schedule 40 PVC pipe that is 30 ft long and includes one elbow and one well-rounded inlet. The pump conveys 0.5 ft/s of water at 60°F from a tank. The net positive suction head required by the pump is 8 ft. Determine where the location of the water level in the tank should be with respect to the pump impeller shaft to prevent cavitation.

Fig: 1