a waste ink outlet in fluid communication with the printhead {HEAD ~ IC} via {TAIL ~ a downstream ink line} 
via
a waste ink outlet in fluid communication with the printhead { HEAD ~ IC } via { TAIL ~ a downstream ink line }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL