What is the static pressure at a discharge point without water flowing?

The static pressure at a discharge point without water flowing is referred to as available pressure. This measurement indicates the potential pressure that can be exerted by the system under ideal, non-flowing conditions. It reflects the pressure available to move water through the system when there are no losses due to flow.

When the system is not under flow, the pressure measured at the discharge point is stable and indicates the maximum potential pressure available before any demand is placed on the water supply. Understanding available pressure is critical for firefighters and operators, as it informs them of the resources at their disposal for effective operations.

The other terms, such as residual pressure, discharge pressure, and retained pressure, have specific definitions that pertain to different states of water flow or operational statuses. They do not accurately describe the static pressure measurement in a non-flowing scenario.