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Old 06-11-2012, 12:57 PM
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toomany MBZ toomany MBZ is offline
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Inch of mercury - Wikipedia, the free encyclopedia

inHg is it's own measurement.

I would think the pump is a diaphragm unit.
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I don’t know vacuum ?? help requested.-screen-shot-2012-06-11-12.55.38-pm.jpg  
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