means coupling said pump inlet to said reservoir for establishing {HEAD ~ fluid communication therebetween} to thereby permit {TAIL ~ withdrawal} of exterminating liquid from said reservoir by said pump; and 
to permit
means coupling said pump inlet to said reservoir for establishing { HEAD ~ fluid communication therebetween } to thereby permit { TAIL ~ withdrawal } of exterminating liquid from said reservoir by said pump ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH