An annular groove is disposed between the sealing portion and the tip portion wherein the tip portion is spaced from {HEAD ~ the tip wall} to provide {TAIL ~ a leakage path} between the annular groove and the second check end 
to provide
An annular groove is disposed between the sealing portion and the tip portion wherein the tip portion is spaced from { HEAD ~ the tip wall } to provide { TAIL ~ a leakage path } between the annular groove and the second check end
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH