What term describes the pressure at a specified point in the distribution system without any hydrants flowing?

The term that describes the pressure at a specified point in the distribution system without any hydrants flowing is known as static pressure. Static pressure reflects the amount of water pressure present in the system when no water is being discharged or flowing from hydrants or other outlets. It is a critical measurement in assessing the performance of fire service mains, as it indicates the potential available pressure that can be utilized during firefighting operations.

Understanding static pressure is essential for ensuring that the system can adequately supply water under non-flow conditions. By knowing the static pressure, fire safety professionals can determine the capacity and reliability of the water supply system before any operational use begins. This measurement is typically higher than residual pressure, which accounts for discharge and the flow that occurs when water is being used.