{HEAD ~ A controller} is preferably in {TAIL ~ communication} with each of the valves for selectively moving each of the valves between an open position and a closed position 
is preferably in
{ HEAD ~ A controller } is preferably in { TAIL ~ communication } with each of the valves for selectively moving each of the valves between an open position and a closed position
HEAD HEAD HEAD HEAD HEAD HEAD REL REL 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