In another preferred embodiment, the inlet port is defined by {HEAD ~ a generally radial bore} in {TAIL ~ the first hub collar} 
in
In another preferred embodiment , the inlet port is defined by { HEAD ~ a generally radial bore } in { TAIL ~ the first hub collar }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL