The planar faces of the base and cover members adjacent the intermediate member each contain a plurality of concentrically spaced circular grooves and a radial conduit affording communication between the grooves, whereby fluid is distributed across the planar faces of the base and cover {HEAD ~ members} adjacent {TAIL ~ the planar filter members} 
The planar faces of the base and cover members adjacent the intermediate member each contain a plurality of concentrically spaced circular grooves and a radial conduit affording communication between the grooves , whereby fluid is distributed across the planar faces of the base and cover { HEAD ~ members } adjacent { TAIL ~ the planar filter members }
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