What is the term for the process of adding foam concentrate directly into the fire apparatus water tank?

Batch mixing refers to the process of integrating foam concentrate into the water tank of a fire apparatus in a specific volume all at once, rather than in a continuous flow. This method results in a homogeneous mixture of foam and water that can be utilized for firefighting operations.

In batch mixing, the foam concentrate is poured directly into the water tank, and the tank is then filled with water, allowing the foam to mix thoroughly before being drawn off for use. This technique is particularly useful when a specific foam solution is required for a certain type of firefighting scenario.

In contrast, continuous mixing involves the introduction of foam concentrate into the system while water is flowing, creating a continuous blend rather than a one-time addition. Proportional mixing typically refers to systems that automatically control the ratio of foam concentrate to water based on flow rates. Direct mixing could imply any type of mixing method, but it does not specifically denote the batch process. Thus, batch mixing is the most accurate term for the defined process.