a sectional housing containing an enclosed filter chamber and including {TAIL ~ a cover member} and a base member {HEAD ~ each} having an outer surface and a planar inner surface, each of said planar inner surfaces containing a plurality of circular, concentrically spaced grooves and a radial groove defining a passage affording communication between said circular grooves, respectively, said cover member containing an inlet opening communicating with said cover member radial groove and said base member containing an outlet opening communicating with said base member radial groove 
a sectional housing containing an enclosed filter chamber and including { TAIL ~ a cover member } and a base member { HEAD ~ each } having an outer surface and a planar inner surface , each of said planar inner surfaces containing a plurality of circular , concentrically spaced grooves and a radial groove defining a passage affording communication between said circular grooves , respectively , said cover member containing an inlet opening communicating with said cover member radial groove and said base member containing an outlet opening communicating with said base member radial groove
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH