The most powerful, efficient Max-E-Pro® Ever - The new Max-E-ProXF® high performance pump was developed using the most advanced computer-aided design and manufacturing (CAD per CAM) plus Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA). The proprietary impeller design delivers a higher level of precision concentricity for increased efficiency. The proprietary hydraulic isolator smooths the priming water at start-up and also smooths the flow inside the volute, raising the efficiency even higher. With outstanding performance from both a maximum-flow and mean-flow perspective, the Max-E-ProXF® is an ideal choice for residential pools with water features such as slides and waterfalls, as well as commercial pools.