What term refers to the pressure on the discharge manifold of the fire pump at the gauge's attachment point?

Discharge pressure is the term that refers specifically to the pressure at the discharge manifold of a fire pump, measured at the point where the gauge is attached. This pressure is an important indicator of the pump's performance, as it reflects the pressure being delivered to the fire hoses or other equipment being supplied by the pump.

Understanding discharge pressure is crucial for fire operators because a stable and adequate discharge pressure is essential for ensuring that water is effectively delivered to the fire scene for firefighting operations. It can influence how far and how quickly water can be discharged through the hoses, making it a vital metric to monitor during operations. High discharge pressure is generally desirable as it ensures that water can reach greater distances or heights.

In contrast, intake pressure measures the pressure of water entering the pump, flow pressure refers to the pressure measured at a certain flow rate during operation, and residual pressure is the pressure remaining at a discharge point while water is flowing, which helps to assess the available pressure under operating conditions. Each of these pressures provides different insights into the pump’s functioning but does not specifically indicate the conditions at the discharge manifold in the way that discharge pressure does.