What should be monitored closely when drafting water from a static source?

Monitoring discharge pressure levels when drafting water from a static source is critical because it provides essential information about the system's performance and the effectiveness of the water supply being utilized. The discharge pressure indicates the amount of pressure being produced by the pump and ensures that it is sufficient to push the water through the required hoses and to the desired location, such as an attack line or master stream.

If the discharge pressure is too low, it may indicate that the pump is not achieving optimal performance or that there is an issue with the water source, such as insufficient flow. Conversely, if the discharge pressure is excessively high, it could lead to equipment failure or dangerous conditions for responders. Monitoring this parameter allows for adjustments to be made promptly to ensure effective firefighting operations.

Other options, while potentially relevant in certain contexts, do not specifically align with the immediate concerns when drafting from a static source. For instance, pressure readings alone do not provide the complete picture, as it is necessary to consider both intake and discharge pressures. Temperature fluctuations are important in certain scenarios but are not directly tied to the operation of a pump while drafting. Pump efficiency ratings are significant for long-term performance analysis but are not as critical in immediate operational contexts when drawing from a static source.