This appears to be a well designed and made in China pump. It's one that the knock-offs are modeled after but aren't up to the same quality and reliability of this unit. Side by side, the Infinion pump has a true "split-capacitor motor" with centrifugal starting and decent capacitor. The motor is physically sized correctly such that it doesn't need a run capacitor to make up for weakness like the knock-offs do and runs cool for hours! It can easily a deep vacuum way into the 25-15 micron range where most gauges begin to loose accuracy. I did some studies of it over a few days, with one oil change in between, and found it to be consistent and quiet. It IS a true Two Stage pump and very efficient at pulling a vacuum right to 25microns according to my Thermal Engineering 14571 gauge. It has a reliable, compliant, check ball inside the brass fitting. There is one 1/4" port and one 3/8" port so you can run a two hose system evacuation for speed. Read full review
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