EFFICIENT: Ultra low flow requirements allow the booster pump to operate on the low speed of a 2-speed or variable-speed pump for energy savings. Find electronics. fashion. accessories. grocery and more.3 by 4 horsepower booster pump.New and improved-easy pump seal replacement.Heavy duty single piece base.Captured backplate nut fasteners.Ergonomic drain plug with o-ring.New larger volute seal o-ring Specifications.Voltage: 115VUPC: 658934754393EAN: 658934754393Package Dimensions: 17.