In the embodiment, a rotational stop cock valve 24 is positioned forward of threaded cap portion 25 in {HEAD ~ nozzle coupling assembly} 21 to selectively permit and restrict {TAIL ~ flow} therethrough 
to selectively permit
In the embodiment , a rotational stop cock valve 24 is positioned forward of threaded cap portion 25 in { HEAD ~ nozzle coupling assembly } 21 to selectively permit and restrict { TAIL ~ flow } therethrough
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 OTH REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH