What does the acronym "psi" stand for in terms of water pressure?

The acronym "psi" stands for "pounds per square inch," which is a unit of pressure commonly used to measure the pressure exerted by fluids, including water in distribution systems. This measurement expresses the force in pounds applied over an area of one square inch. Understanding psi is vital for water distribution professionals, as it helps in assessing system performance, ensuring adequate pressure for delivery to consumers, and troubleshooting issues related to pressure in pipelines. This unit provides a clear and quantifiable way to communicate pressure levels across various systems and applications.