Waterway Hi-Flo Side Discharge 4HP Dual-Speed Spa Pump, 230V 3421621-10

The Hi-Flo Side Discharge 48-Frame is an efficient pump designed for high volume discharge for faster filtering cycles. It's rotatable wet end and superior design allows for easy installation. The Hi-Flo is ideal for new installations or as a replacement pump. Waterway's commitment to design, innovation and quality American made products makes for a solid combination of style and dependability. Center vs. Side Discharge Pumps Swimming 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 wet end. Water is propelled through the openings and flows out through the jets in your spa. Side discharge pumps are up to 60% more efficient for pumping out high volumes of water than center discharge pumps. What the frame size on a spa pump mean? The frame size on a spa pump is the physical size of the spa pump motor. The frame is the piece that mounts the wet end to the motor. The frame size is located on the motor's ID plate, usually marked with an F for frame size. The thru-bolt spacing is also an indicator of frame size. A 48 frame motor has bolts spaced less than 4 inches apart, and the 56 frame motor has bolts with spacing more than 4 inches apart.