A removable clamp, for supporting a membrane filter in a medical infusionsystem, includes connected and opposingwalls. A locking feature, which may be connected to an end of one of thewalls, engages and disengages a terminal end of theother wall. The filter may be inserted between the opposing walls of theclamp, and an inner surface of each of the opposing wallsmay be secured against corresponding major surfaces of the inserted filter, byonly pressing at least one of the opposing walls ofthe clamp toward the other of the opposing walls.