In various arrangements, the threaded collar is sized for {HEAD ~ threaded engagement} with an inlet or {TAIL ~ outlet} of the storage tank, a drain opening of the tank, or a pressure relief valve of the tank 
In various arrangements , the threaded collar is sized for { HEAD ~ threaded engagement } with an inlet or { TAIL ~ outlet } of the storage tank , a drain opening of the tank , or a pressure relief valve of the tank
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH 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