For halocarbon clean agents in a multiple container system, what is required for containers supplying the same manifold outlet for distribution of the same agent?

• A. All containers must be the same color
• B. All containers must be interchangeable and of one select size and charge
• C. All containers must be manufactured by the same company
• D. All containers must be operated at the same temperature

Answer: (B)

When feeding the same manifold outlet from multiple cylinders of the same halocarbon clean agent, the containers must be interchangeable and of a single size and fill. This ensures each cylinder provides the same flow characteristics at the same pressure, so the agent is discharged evenly through the manifold to the protected area. If the cylinders differed in size or charge, their pressures and flow rates would vary, leading to uneven delivery and potential under- or over-coverage. Color, manufacturer, or temperature alone don’t control this balance, whereas having identical-size, identical-fill cylinders ensures reliable, predictable distribution from the shared outlet.