system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a scientific benefit of water towers being bulb-shaped and sitting on a long pole? 

Why so high in the air? Does this have any certain effects on the water itself? Or is it just to create pressure leading out to the pipes?
gpt
There is no chemical change to the water at the top of a water tower; the goal is to give the water enough potential energy that it will flow through the pipes in the surrounding area with enough pressure to reach the upper floors of nearby buildings without backflow. In some cities (like New York city), you can also see water towers atop individual buildings. They don't sit very far above the roof, but work well for supplying water to that particular building.