HP stands for operational horse power and is a notation specific to Aqua-flo
Certifications : UL1563 class2
slim and built to take full advantage of its cutting edge electronics
highly versatile 6-1/2"diameter wet end for higher head pressure
along with a three year warranty on its motor and wet end
Waterway Hi-Flow, 1.5HP, 115V High Flow, 48fr, 2Sp validate-product-description HP stands for operational horse2 HP Hi Flo Side Discharge Spa Pump Features: 1. 5 HP, 120 v, 2 Speed, 48 frame motor. 2" union connections, WW 4005570 (not included). High volume side discharge efficiency. 60% more efficient than our center discharge pumps. 2" intake and discharge. Wet end can be rotated for easy installation. Large 6 1 2 diameter wet end for higher head pressure. Viton Seals. Part # HP Volt FRAME AMP high vs low 3420610 10 KIT 1. 5 HP 120V High Flow, 48fr, 2Sp 16.