What unit is commonly used to measure pressure in water systems?

Pounds per square inch (psi) is widely recognized as a standard unit for measuring pressure in water systems, particularly in the United States. It is commonly used in various applications, including plumbing systems, water distribution networks, and pressure gauges. The use of psi provides a familiar reference for those working in the field, allowing for easy communication and understanding of pressure levels in water systems.

While other units such as Pascals, Bars, and Kilopascals are indeed valid and used in different contexts (such as scientific applications or international settings), psi is predominant in many practical, day-to-day applications in North America. This familiarity makes it a preferred choice for those involved in operating and maintaining water systems.