Which of the following are typical pump suction configurations?

• A. Flooded suction pump only
• B. Booster pump systems only
• C. Flooded suction, Booster, Suction lift, Submersible
• D. Submersible with flooded intake

Answer: (C)

Understanding pump suction configurations helps manage suction head and cavitation, which are central to reliable irrigation pumping. Flooded suction means the suction line is full of liquid and the source is at or above the pump, giving a positive suction head and minimizing cavitation risk. Suction lift is used when the pump sits above the liquid source and must draw the liquid upward, which requires sufficient priming and NPSH margin and is more sensitive to vapor pressure limits. Submersible pumps are fully immersed in the liquid, so there is no suction head to deal with, reducing cavitation risk and simplifying installation for wells or submerged basins. Booster pump systems come into play when extra pressure is needed in the main line, often after the suction side has already been set up for adequate flow; they are a common enhancement in irrigation where longer runs or higher heads are required. Since real installations often involve a mix of these approaches, the option that includes flooded suction, suction lift, submersible, and booster pump systems best represents typical suction configurations.