And I bet if you propped the center of the hose over 33 feet, it will split the water and stop the flow. So...I have to agree pressure is required to keep the water from splitting, provided the tube is large enough for capillary action to make the water “stick” to the tube.
My point is, the pressure is not required for the water to flow. But I can see how you need it to keep the water from splitting into the two sections of the tube.
There are two things at work: Keeping the water in the tube, and making it flow from a higher container to a lower one. So, odd as it seems, we’re both correct.
provided the tube is too large for capillary action to make the water “stick” to the tube.