Flask filtering with side tube


A thick-walled Erlenmeyer flask with a short glass tube and hose barb protruding about an inch from its neck, the short tube and hose barb effectively act as an adapter over which the end of a thick-walled flexible hose can be fitted to form a connection to the flask, the other end of the hose can be connected to source of vacuum such as an aspirator, vacuum pump, or house vacuum. It is used in the Laboratory as a vacuum trap in a vacuum line to ensure that no fluids are carried over from the aspirator or vacuum puump to the evacuated apparatus or vice versa.


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