Lordo wrote: what do you know about gravity fed water supply.
since you know everything about gravity fed water, i have a water tank at my orchard that's placed on a tower 3 meters high. I fill the tank from a water well.
The pipe from the bottom of the tank goes 2 meters horizontal then straight down to ground level to a water tap. Every time the tank gets empty and I fill it up, the water refuses to flow. It flows "damla damla'. Why?