How is water pressure typically measured in a distribution system?

Water pressure in a distribution system is measured in pounds per square inch (PSI). This measurement indicates the force exerted by the water against the walls of the pipes or other containers. PSI is a standard unit in both the water industry and many other engineering fields because it provides a clear and consistent way to express pressure levels in systems.

Using PSI allows water operators and engineers to assess whether the pressure in the system is adequate to deliver water effectively to consumers and to assess the health and functionality of the distribution system. Understanding this unit of measurement is crucial for maintaining appropriate pressure levels for safe and efficient water delivery.

The other measurements listed do not accurately measure pressure. For instance, gallons per minute (GPM) refers to flow rate, liters is a volume measurement, and cubic feet per second (CFS) also pertains to flow rather than pressure. Thus, PSI is the appropriate and widely accepted unit for measuring water pressure in distribution systems.