{HEAD ~ A pair} of {TAIL ~ flanges} 27, protrude centrally from opposed ends of cylindrical valve member 24b along cylindrical axis C thereof, perpendicular with the longitudinal axis of reservoir 2 
of
{ HEAD ~ A pair } of { TAIL ~ flanges } 27 , protrude centrally from opposed ends of cylindrical valve member 24b along cylindrical axis C thereof , perpendicular with the longitudinal axis of reservoir 2
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL 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