Pentair 011518 WhisperFlo High Performance Energy Efficient Single Speed Up Rated Pump, 1 1/2 Horsepower, 115/208-230 Volt, 1 Phase The Pentair WhisperFlo two-speed full rated 1-1/2-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 Oversized strainer basket extends time between cleanings; see-through lid makes inspection fast and easy Compatible with all cleaning systems, various filters and jet action spas; 1-year limited warranty