I'm stuck on a problem. I know that for 1 psi you need 2.31 feet of water in a column. But I don't believe that water form a tube 1" diameter and 7' tall, (.4870838 pounds of water equals 6.201psi) could lift a weight. My problem is lets say there is a horizontal cylinder tank suspended 7' above ground. And it had a tube attacked to it going down to the ground 7' and then back up 7'. But on the way up it encountered a 25 or 20 pound weight. Now the weight of the water verticle in the tube weighs less than the weights. So I know the water will stop in that case. But if the tank is full of water will the gravitational flow of water push the weights up. Even though the pressure would only be the static pressure from the verticle tube.