In one aspect, a method for assembling a filtration system is provided. The method includes providing a filter including a retainer formed therewith. The method also includes coupling a gasket about the retainer such that the gasket circumscribes the retainer, such that the gasket is integrally formed with a clamp and such that the clamp is coupled to the retainer in a friction fit.

A strike or keep assembly comprises a faceplate 5, a backplate 6 including a body portion having a planar front face butting up against a planar back face of the faceplate and one or more projecting portions (12, fig.2) extending rearwardly from the body portion of the backplate into contact with a face 16 of a supporting frame, a screw-threaded member 7 in a threaded hole in the faceplate and ext...