General Purpose Motor: Totally Enclosed Fan-Cooled, Rigid Base Mount, 4 HP

Split-phase carbonator pump AC motors are single phase with a lower starting torque for softer startup where the pump must gradually come up to speed after startup. They have an open dripproof (ODP) enclosure with ventilation openings in the endshields and shell positioned so that drops of liquid falling within 15? from vertical will not affect motor performance.

Three-phase fire pump AC motors are highly efficient with a high starting torque compared to single-phase models of the same HP, rpm, and frame size. They operate without start or run capacitors that can wear out and fail.