filter pump

noun

1. a vacuum pump used to assist laboratory filtrations in which a jet of water inside a glass tube entrains air molecules from the system to be evacuated

Example Sentences

Air is often partially exhausted from receivers or vessels by the use of a filter pump or aspirator.

From Project Gutenberg

In the filter-pump, water is used instead of mercury, the pump being connected to an ordinary water-tap.

From Project Gutenberg