The tube initially has one end extending through the bottom or closed end of the plastic bottle and an opposite end which is open and positioned at a predetermined distance from {TAIL ~ the discharge end} of the bottle, in order to develop an effective hydrostatic pressure head at the point of {HEAD ~ said predetermined distance} 
The tube initially has one end extending through the bottom or closed end of the plastic bottle and an opposite end which is open and positioned at a predetermined distance from { TAIL ~ the discharge end } of the bottle , in order to develop an effective hydrostatic pressure head at the point of { HEAD ~ said predetermined distance }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD