To you guys unsure of the pressure range… This is really a common sense kind of issue. Does it make sense that the pump would generate 0" of vacuum, i.e. a PERFECT vacuum? No, of course not. It’s a $15 part for hobbyists. This means that it generates up to 16" of differential pressure, i.e. at 30" of mercury atmospheric pressure, it can bring that pressure down to ~14" or up to ~46".
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