A portion of the cap defines a large cylindrical cavity having a channel formed therein which is positioned so that an O ring provides a substantially water tight seal when {HEAD ~ the filter cartridge} is in {TAIL ~ an operative position} in a manifold 
is in
A portion of the cap defines a large cylindrical cavity having a channel formed therein which is positioned so that an O ring provides a substantially water tight seal when { HEAD ~ the filter cartridge } is in { TAIL ~ an operative position } in a manifold
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH