In relay pumping operations, what is the role of the relay pumper?

The role of the relay pumper in relay pumping operations is to act as a booster pump. This function is crucial for maintaining adequate pressure in the fire suppression system over long distances. In relay pumping, water is transported from a water source via a supply line to one or more relay pumpers, which then increase the pressure before sending the water onward to the attack pumper. The relay pumper helps to ensure that the water reaches its intended destination with sufficient pressure to be effective in firefighting operations.

The other options touch on aspects of pump operations or might seem relevant, but they do not accurately describe the specific function of the relay pumper within relay pumping operations. The relay pumper is primarily focused on boosting pressure rather than directly supplying water, acting as a supply hose, or monitoring pressure levels.