What is the approximate pressure at ground level for a building that is 100 feet tall with water lines all the way to the top?

To determine the pressure at ground level for a building that is 100 feet tall specifically regarding water lines reaching all the way to the top, we can use the principle that pressure increases with depth in fluids. The pressure exerted by a column of water is given by the formula:

Pressure (psi) = Height (feet) x 0.433

In this scenario, height is 100 feet. By applying the formula:

Pressure = 100 feet x 0.433 psi/foot = 43.3 psi

Thus, at the base of the building, the approximate pressure due to the weight of the water at the top is indeed 43.3 psi. This calculation is crucial for understanding how water pressure works in tall buildings and ensures that the plumbing systems can adequately deliver water to all levels of the structure. The correct answer captures the basic principles of hydrostatics relevant to the operation and design of water systems in multi-story buildings.