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Message: <blockquote data-quote="broomvac" data-source="post: 406187" data-attributes="member: 771">There will always be a loss which increases with an increase in hose length. If air were inviscid, this would not be the case, but of course air does have viscosity. However, increasing your vacuum hose length by a foot or two would probably cause only a negligible pumping loss.[URL unfurl="true"]https://en.m.wikipedia.org/wiki/Hagen–Poiseuille_equation[/URL]</blockquote>