Which method is NOT used to resupply foam?

The method that is not typically used to resupply foam is discharging through a hose reel. While hose reels are commonly utilized for quickly deploying firefighting agents and delivering water or foam to a fire, they are not practical for the purpose of resupplying foam. Hose reels are designed for active firefighting, where foam is applied to a fire or hazardous material, rather than for the refill process.

Resupplying foam usually involves methods that accommodate larger volumes and more efficient transfer. Overhead gravity systems allow foam to be deployed from a higher reservoir by using gravity, which facilitates a steady and controlled flow. Transferring foam through a tender is another effective method, as it allows large quantities of foam to be transported and resupplied rapidly. Filling directly from a 5-gallon container is a standard way to supply smaller quantities but is also not the most efficient method for large-scale foam operations compared to other methods.

In summary, for efficient resupply of foam in firefighting operations, the correct resupply methods focus on adequate volume transfer and accessibility, which makes discharging through a hose reel unsuitable for this specific function.