What pressure is represented by each inch difference in the level of water columns?

The correct value representing the pressure change produced by a one-inch difference in the level of water columns is 5.2 lbs per square foot. This relationship arises from the basic principles of fluid statics, where the pressure exerted by a column of liquid is derived from its height, density, and the acceleration due to gravity.

In the case of water, one inch of height in a water column exerts a specific pressure determined by the density of water (approximately 62.4 lbs per cubic foot) and the relationship involving feet to inches. Thus, when converting and calculating the pressure exerted by a vertical column of water, a common approximation notes that each inch of water produces about 0.433 psi. When converted into pounds per square foot, this translates to approximately 5.2 lbs per square foot for every inch of water height.

Understanding this principle is crucial in scenarios like mine safety, where accurate measurements of pressure are essential for maintaining safe working conditions.