Question: An Mvrated self-priming centrifugal pump will be used to dewater a trench during pipeline construction. The required pumping volume is estimated at 200 gal/min (757 Clmin). The pump will be located 10 ft (3.1 m) above the trench bottom. The suction line will consist of 25 ft (7.6 m) of 3-in. (7.6-cm) hose, and the discharge line will consist of 75 ft (22.8 m) of 3-in. (7.6-cm) hose. Water will be discharged 20 ft (6.1 m) above pump level. What is the total head developed? What is the minimum-size pump required?