An elevated storage tank contains water at 82.2C, as shown in Fig. 5.1-4. It is desired to have a discharge rate at point 2 of 100 gal/min (0.223 ft/s). What must be the height H in ft of the water's surface in the tank relative to the discharge point? The pipe used is commercial steel pipe, Schedule 40, and the lengths of the straight portions of the pipe are shown. Solution: The mechanical-energy-balance equation (4.2-28) is written between points 1 and 2. 8 (5.1-20) - + + 21 . + - Ws=2 , P2 8 + 8 2ag. 8c 2ag. 1643 and 0.347