Waterway Executive 48 – 3421221-1A – 3HP Dual-Speed 48 FR Spa Pump, 2″ Intake, 2″ Discharge, 230V spa pump has increased efficiency with its 2-Speed design. The Waterway Executive 48 is thermally protected to extend the life expectancy of the motor and a highly versatile wet end with a large 6-1/2diameter that can be rotated 90 degrees. Side Discharge PumpsSwimming pool and spa pumps are classified, in part, according to the orientation of their discharge openings. Center discharge pumps have an opening located in the center of the wet end, while side discharge pumps have an opening located on the side of the.