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 an operative position in {TAIL ~ a manifold} 
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 an operative position in { TAIL ~ 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 OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL