Pentair 011518 1.5 HP WhisperFlo WFE-26 Efficient In Ground Swimming Pool Pump The Pentair WhisperFlo rated 1.5 horsepower high performance pool pump is ultra quiet Single speed, single phase, efficient design Unique FunnelFlo diffuser and high efficiency impeller maximize water flow and energy efficiency while minimizing turbulence and noise WhisperFlo costs less to operate, because it uses less horsepower to produce required water flow 115/208 230 Volts