• Highlight: Ametek 117478 is a 2-stage 7.2" 120V bypass motor with tangential discharge and ball bearings — the larger-diameter Ametek platform that delivers commercial-grade CFM and water lift.
• Best For: Walk-behind floor extractors, large central-vac power units, and full-size wet/dry recovery vacuums that originally specified a 7.2" Ametek bypass platform.
• Expert Note: Stepping from 5.7" to 7.2" gives roughly a 30%+ open-flow CFM gain at the same stage count — the reason this size shows up in mid-size commercial extractors and central-vac systems.