How much pressure is needed to pump up water up 800 meters in psi

Hey, how much pressure is needed to pump up water up 800 meters in psi, or psc(lb per sq cm)

More specifically, how much pressure is used to pump water to the top floor of the Burj Khalifa.

Atleast 176.4 lb/cm^2 without booster pumps.

In reality, modern high rises use a system of booster pumps to lift the water, rather than using high pressure at the base. So it may enter the building at around 80 psi and free flow to the 8th floor or so, where a pressure pump will boost its pressure back up to 80 psi for the next few floors and so on.

The required pressure depends on the diameter of the pipe carrying the water. The thinner the pipe, the less pressure is required for any water to make it to the top, but the pipe can carry less volume.

Look at a tree. It has lots of thin tubes that run from the bottom to the top. The thin tubes require very little pressure at the bottom to push the water all the way to the top of a very tall tree.

Seven double-storey mechanical floors house the equipment.
Distributed around every 30 floors, the mechanical floors house the electrical sub-stations, water tanks, pumps and air handling units that are essential for the running of the building.
These mechanical areas typically serve the 15 floors above and below them.