pushing water

Take the weight of water, find the area inside the tube, determine your volume of water you wish to move, factor in gravity to find the force needed to push up on the water to counteract gravity. you will need a force just greater than this force. Then, you'll at least have a start on enough information to ask the question in a way to get a good answer.

But you need to keep in mind, that water is heavier than air, the air will not "push or move" the water unless you create a piston/seal to keep them separated, or you'll just have a nice bubbling tube. So your/were going to need to know a bit more...

.433 PSI per foot of rise if you are pushing water.

Just out of curiosity, what are your assumptions?

.433 PSI=1 foot of head.

You are correct when you say, "But you need to keep in mind, that water is heavier than air, the air will not "push or move" the water unless you create a piston/seal to keep them separated, or you'll just have a nice bubbling tube."

Happy Turkey Day.

HAPPY THANKSGIVING..........Here is a recipe I thought you would like for the holidays


Ingredients:
1 whole turkey
1 large lemon, cut into halves
salt and pepper to taste
butter or olive oil, whichever you prefer

Heat oven to 350 degrees

Rub butter or oil over the skin of the turkey until it is completely coated.
Sprinkle with salt and pepper and any other seasonings you prefer.

Take a knife and gently separate the skin from the breast meat;
Slide lemon halves under the skin with the peel side up, one on
each side. This way the juice from the lemon will release into the breasts.

Cover and bake for 30-45 minutes. Remove cover and continue
to roast until juices run clear, basting every 15-20 minutes.

If you've followed these steps correctly, your turkey should
look like the one in the picture.

Bon Appetit!

Take a knife and gently separate the skin from the breast meat;
Slide lemon halves under the skin with the peel side up, one on
each side.....

This is an engineering forum, not a "breast implant one"

Just a little lemon zest.

If you measure the pressure in inches of water, you don't need any maths.
The tube diameter is irrelevant, as the pressure is measured 'per square inch' .

E.G. 40 psi on a tube of 1inch section will exert 40pounds, but if you double the tube section, you have twice the weight of water, but you now have 80pounds of pressure as it was 40pounds per square inch and you have 2 square inches.
Del

The pressure needed is the depth of the water using the expression

P=ρgh,

where P is the pressure, ρ the density (which varies with salinity and temperature), g the acceleration due to gravity (which planet is this pipe on?) and h the height of the water column above the air inlet point.

That's physics.

How fast the water moves up the tube is a function of the tube diameter, the flowrate of air into the tube, the viscosity of the liquid, the temperature, etc., etc.

That's process engineering.

• Interestingly, there is a sewage treatment process involving the construction of a cylinder deep into the ground, fitted with a divider plate across its diameter almost to the bottom so as to make two interconnected shafts of semicircular cross-section. Sewage flows into one side of the cylinder. Air is blown in through a diffuser pipe near the bottom of the other side of the cylinder, and the air causes the sewage that side to rise. The pressure experienced at depth causes a high rate of take-up of oxygen from the air, and the time taken for an aliquot of sewage to get from the bottom of the cylinder to the top is an input into the reduction of biological and chemical oxygen demand in the sewage coming off the top of the second cylinder by the bugs present in the sewage. In one fell swoop one has processed a lot of sewage for a very small plant footprint!

Maybe you want this?

http://www.fao.org/docrep/010/ah810e/AH810E07.htm

See 3.9 Air lift pumps