Whisperflo Pump 3 HP 3 PH TEFC Super-Duty Robust thermoplastic with the Cam & Ramp™ "see thru" lid design. Self-priming, high flow with patented Funnel-Flo diffusers. 2 in. suction and discharge ports. Motor features threaded shaft and durable commercial duty 56 frame motor with NEMA square flange. Features: • 2-speed Whisperflo® 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. • Oversized strainer basket and volute - industry standard in pool pumps • Standard and Energy-efficient Square Flange Motors available • Lower HP's deliver higher performance than industry standard • Compatible with all cleaning systems, various filters and jet action spas • Heavy-duty/durable construction is designed for long life • Designed for residential and commercial applications • New motor increases life, energy, efficiency, ease of installation and better cooling for long service life