you may want to define space, because if your talking an enclosed tank with a fluid in it, there is a differential in pressure due to the mass of the fluid. typically with gases its so small its considered 0 but with liquids it is accounted for. also if you have a flowing system of tubes with bends, restrictions, ect, you will have a pressure loss due to the headloss of the restrictions.
yes, the water at the bottom of a 1/2 full 55 gallon drum is under greater pressure than the air thats right above the water. those are 2 different places though. and i do understand about head pressure and pressure loss from elbows, fittings and tube length, I.D., etc...
the 'space' im talking about the small space inside of the barbed stinger fitting. it cant be under a vacuum and under pressure at the same time (relative to itself, not atmospheric pressure). if its indeed a venturi setup, it wouldnt only draw in liquid but not air. it would draw air and water WITHOUT THE NEED OF PRIMING. but its not, so it doesnt.
Waterhawks still full of :bs2:.
troo!:haha:
come on wankmaster, lets see that vid!:cheer:
:haha::haha: