Base port 10 may be connected to {TAIL ~ a vacuum} to facilitate {HEAD ~ fluid pull} through 
Base port 10 may be connected to { TAIL ~ a vacuum } to facilitate { HEAD ~ fluid pull } through
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH