A filter funnel and assembly is an important laboratory setup used to separate solid particles, microorganisms, or other unwanted materials from liquids. Depending on the application, filtration can be performed using gravity or vacuum pressure. A basic filter funnel holds the filter paper or membrane in position while the liquid passes through it. A complete filter assembly can include the funnel, filter support, clamp, seal, and receiving flask. Choosing compatible components helps reduce leakage, clogging, and filtration problems.