Abstract: Filter unit assembly located at an operator-designated position is provided for enabling fluid flow through a removable mesh filter and ready disconnectibility from a vacuum line with the avoidance of liquid spillage from the filter unit assembly. The filter unit has a chamber which is open at one end and closed at its other end except for an outlet conduit displaced from the longitudinal axis of the chamber, first and second outwardly extending grip means which are displaced from each other about the longitudinal axis of the chamber, first and second supports for permitting the unit to rest in different stable positions, and a cap member for which engages and closes the front end of the chamber and has an axial inlet.