Thats easy - intermeadiate booster pumping stations at every 30/40stories.
In tall buildings the pressure provided by a municipal
water system is generally not sufficient to provide adequate
pressure at the top of the building. As an example,
municipal water systems typically provide maximum
pressures in the range of 100 to 150 psi. This translates to
buildings of 20 to 30 stories. Above this height the building
will require a water pressure booster system.