WhisperFloXF™ from Pentair

The WhisperFloXF^™ pool pump was developed using the most advanced engineering tools available -- CFD (Computational Fluid Dynamics) and FEA (Finite Element Analysis). The proprietary impeller design delivers a higher level of precision concentricity for increased efficiency. The proprietary hydraulic isolator smoothes the water flow inside the volute, raising the efficiency even higher. With capabilities in excess of 200 gpm, WhisperFloXF is an ideal choice for many residential and commercial applications; especially those involving water features, negative edges and slides.

Features
  Dual-compartment motor for simplified field wiring
  Union connectors included for connecting directly to 2.5" or 3" plumbing
  Diamond seals made of oxidation-resistant, self-retaining EPDM rubber for increased durability and tighter seal
  Extra-large, robust basket with smooth surface for easy debris removal
  Drop-in replacement for original WhisperFlo; and optional riser plate enables easy Challenger replacement
  Modular plumbing system means less need to cut and glue pipe
  External port threading and tool-free union nuts need only hand tightening
  Easy-carry handle; easily removable, ergonomic lock ring; and see-through lid for easy basket inspection
  Hydraulic isolator separates priming water from pumping water for faster priming, more turbulence-free flow and increased efficiency