a first flexible tube communicating by {HEAD ~ one end} with {TAIL ~ said reservoir} and by its other end with the suction side of said pump for delivering said liquid from said reservoir to said pump 
with
a first flexible tube communicating by { HEAD ~ one end } with { TAIL ~ said reservoir } and by its other end with the suction side of said pump for delivering said liquid from said reservoir to said pump
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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