The Original Blue Cup People

The vacuum source, normally a pump, is important to making the vacuum cup perform.

A single source of vacuum (one pump to one vacuum cup) is the ideal as sharing the vacuum source can cause many problems.

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Specifically if one vacuum cup leaks it can inhibit or reduce the effectiveness of the other cups. If however this is not possible consider using a cluster of smaller cups mounted on a manifold that distributes vacuum equally (when one cup cannot do the job).

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Furthermore, you can consider several vacuum sources and distribute the vacuum to separate cups or consider mixing the vacuum source lines - if one cup leaks it will not affect the neighbouring cup.