And if you're depending on the venturi-effect to get the
water into the lift-column, how do you expect to get ENOUGH
water in there to seal in the next bubble? All you're
going to get is an atomized spray. That will, admittedly,
get a nominal amount of water to the top of the exhaust
port, just not enough to matter.

Wrong. The tube starts out empty. Tube goes to bottom of tank into a
"bell" with the air inserted under it. Not a big trick.


Ok, when YOU use the word "venturi", what do you mean?