The device 1, wherein said housing includes an outlet connection communicating with said outlet chamber for {TAIL ~ connection} to a pressure indicator for indicating the pressure in {HEAD ~ the outlet chamber} 
The device 1 , wherein said housing includes an outlet connection communicating with said outlet chamber for { TAIL ~ connection } to a pressure indicator for indicating the pressure in { HEAD ~ the outlet chamber }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD