This would not test all the available leak paths but would check {TAIL ~ the integrity} of {HEAD ~ the plug} itself 
This would not test all the available leak paths but would check { TAIL ~ the integrity } of { HEAD ~ the plug } itself
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH