A flow-through fitting and filter assembly is provided including a fitting body with a cavity, and a filter coupled to fitting body and positioned within the cavity. The filter includes a filter support and a filter element mounted on the filter support. A first end portion of the filter support is of a generally cylindrical cup shape including an outer annular wall in close sliding relationship the inner wall forming a fitting cavity to provide a guiding function while passages in the first end portion provide relief of fluid from the end of the cavity. A second end portion of the filter support includes an outer annular surface having an outer annular diameter greater than the inner annular diameter of the inner annular surface of the fitting body to create an interference fit and a fluid seal.