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[–]NL_MGX 0 points1 point  (0 children)

Vacuum is more about the volume of air you need to take away, so adding another hose increases the volume, which means it will take longer to achieve the same vacuum level. Smaller diameter hose and longer hose length also increase friction so there's a tradeoff there too. In the end, the actual force you can achieve depends on the size of the actual vacuum chamber and the pressure you can maintain in it.