Problem

Water flows from tank A to tank B (Figure), and the water surface elevation difference is...

Water flows from tank A to tank B (Figure), and the water surface elevation difference is 60 feet. Assume the water temperature is 68°F, the pipe material is cast iron, and the pipeline has the following characteristics:

large pipe:	1,000 ft long (D = 16 in.)
bends:	four (R/D = 4 in large pipe)
small pipe:	1,000 ft long (D = 8 in.)
expansion:	sudden

Determine the system’s existing flow rate. What percentage increase in the flow would occur if the 8-in. line were completely replaced with the 16-in. pipeline?