When an AFFF station is low, AFFF can be transferred from station to station using what and when?

When an AFFF station is low, AFFF can be transferred from station to station using what and when?

• A. Manual hand-pump only
• B. Gravity feed with no valve alignment
• C. Direct pumping from seawater
• D. The injection pump when the correct valves have been aligned

Answer: (D)

The key idea is that moving AFFF between stations requires a defined transfer path that is created by correctly aligning the transfer valves and using the injection pump to drive the transfer. When the valves are set to connect the donor station to the receiving station, the injection pump pulls the concentrate from the donor and injects it into the recipient’s line, efficiently restoring proper AFFF levels. This method is preferred because it provides controlled, reliable transfer of concentrate and keeps seawater out of the transfer path, preventing contamination. A manual hand-pump would be too slow and impractical for station-to-station transfers. Gravity feed without valve alignment won’t establish a proper, isolated path, and pumping directly from seawater would contaminate the AFFF system.

The key idea is that moving AFFF between stations requires a defined transfer path that is created by correctly aligning the transfer valves and using the injection pump to drive the transfer. When the valves are set to connect the donor station to the receiving station, the injection pump pulls the concentrate from the donor and injects it into the recipient’s line, efficiently restoring proper AFFF levels.

This method is preferred because it provides controlled, reliable transfer of concentrate and keeps seawater out of the transfer path, preventing contamination. A manual hand-pump would be too slow and impractical for station-to-station transfers. Gravity feed without valve alignment won’t establish a proper, isolated path, and pumping directly from seawater would contaminate the AFFF system.