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