FEATURES 2-speed WhisperFloXF pump models are now ENERGY STAR® Certified: meets strict energy efficiency criteria set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. Drop-in replacement for all WhisperFlo® Pump models. Simple replacement for Challenger® Pumps.* Hydraulic isolator separates priming water from pumping water for faster priming, more turbulent-free flow and increased efficiency Dual-compartment motor for simplified field wiring

Go to link