What method is used when securing additional water from a primary pumper to a second pumper?

Tandem pumping is the correct method used when securing additional water from a primary pumper to a second pumper. This technique involves connecting two or more fire apparatus in a sequence, allowing the first pumper to supply water directly to the second, which can then distribute it to the fire scene or additional locations as needed. This method is particularly useful when the primary water source is insufficient to meet the demand of the incident.

In tandem pumping, the first pumper typically has a larger capacity and is positioned closer to the water source, while the second pumper can operate at a different location, optimizing the flow of water and ensuring a consistent supply. This arrangement helps maintain the pressure necessary to deliver water effectively over distances or to multiple hoses without compromising flow rates.

Other methods like relay pumping, while also involving multiple pumps, focus on moving water over longer distances or elevations, often using several pumpers along a hose line to boost pressure. This is different from tandem pumping, which emphasizes direct water supply between two units. Direct and emergency pumping methods may involve different operational contexts, such as immediate water supply from a single source or quick response situations, but do not specifically address the secure transfer of water between two pumpers in the manner described in tandem pumping.