Which member of an attack team is responsible for securing water to rupture the fire hose?

The member responsible for securing water to rupture the fire hose is known as the plug man. This individual's specific role is to establish a reliable and adequate water supply for firefighting operations. The plug man connects to a hydrant or water source and ensures that water flows through the hose with sufficient pressure to effectively combat the fire. This role is crucial since having immediate access to water can make a significant difference in controlling and extinguishing fires.

The other roles, while important in their contexts, do not focus on the water supply process in the same way. The water supply officer oversees the entire water supply operation but does not physically secure the water; the hose handler is responsible for managing the hose itself during deployment and operation; and the firefighter executes various firefighting tasks but may not specifically handle water supply logistics. Therefore, the plug man's role is pivotal in securing water to rupture the fire hose.