A three way valve operates to direct {HEAD ~ the flow} of the concentrates into or bypassing {TAIL ~ a container} located at a filling station in which the chemical composition is formed 
into
A three way valve operates to direct { HEAD ~ the flow } of the concentrates into or bypassing { TAIL ~ a container } located at a filling station in which the chemical composition is formed
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH