A propeller pump is a high-flow, low-lift impeller-type device with a linear flow path. Propeller pumps are generally mounted with the impeller below water level and the motor above. However, they can also be installed vertically, horizontally, or at an angle. These pumps draw water through an outer casing and out of a discharge outlet through a propeller-bladed drive head. Propeller pumps are used in water treatment facilities, chemical plants, or agricultural applications where high head values are not required.