Which conversion factor is used to relate feet of head to psi?

The conversion factor used to relate feet of head to psi is 0.433. This conversion factor is derived from the relationship between pressure, height of fluid column, and the density of the fluid. Specifically, for water, 1 foot of head is equivalent to approximately 0.433 psi. This means that for every foot of height that a column of water is raised, it exerts a pressure of 0.433 pounds per square inch at the base.

This conversion is fundamental in plumbing design as it enables engineers and designers to translate measurements of water head, which are often provided in feet, into pressure values expressed in psi. Understanding this relationship is crucial for calculating system pressures, selecting appropriate pumping equipment, and ensuring effective fluid distribution in plumbing systems.

It’s essential to remember that this conversion factor is specific to water at standard atmospheric conditions. Different fluids with varying densities would require different conversion factors. Thus, when dealing with design calculations, using the correct factor helps maintain accuracy and effectiveness in plumbing systems.