| In the diagram above, the bottle is holding 50 or
80psi. The pump is pumping the pressures into the bottle, and
the gage is showing what pressure the bottle is at. Barbara is
pumping the bottle up. This is two man job, because the pump
is hard to push down after awhile. When this happens, the pump
is unsteady, and can tip. To prevent this you need two people,
one to hold the bottle and pump, and the other to pump.