In my country we built a water tower (cylinder shape) , so if it in (20) meters height it will give you (2) bar for agricultural regulations.
so this design is a (20) cm height and (4) cm width to be ( 1:100) scale to give you (0.02) Bar :).
You can print it without any support
You can re scale it and the sticks will fit
The author hasn't provided the model origin yet.