A smooth pipe of a total length of 20 m/s used to supply water into the house from an overhead tank. The pipe line has a protruded entrance, 4 standard 90° elbows, one tee (straight flow), and one...

A smooth pipe of a total length of 20 m/s used to supply water into the house from an overhead tank. The pipe line has a protruded entrance, 4 standard 90° elbows, one tee (straight flow), and one fully open globe valve. Determine the size of the pipe to maintain a flow rate of 30 L/ min for water at 20°C, if the available head is 5 m.