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