To ensure that auxiliary agents do not become packed and unusable you must ____________________ ?

• A. Thoroughly flush the systems after each use
• B. Store in sealed containers
• C. Shake the lines before use
• D. Keep at elevated temperature

Answer: (A)

Regularly flushing the system after use is essential to keep auxiliary agents from settling, drying, or packing in the lines. When foam concentrates or other extinguishing additives remain in hoses and valves, they can harden or separate over time, creating blockages and reducing reliable flow or altering the mix next time you discharge. Flushing with clean water through all lines clears residues, primes the pumps, and ensures nozzles stay unobstructed, keeping the system ready for the next operation. The other options don’t address removing leftovers from the lines: storing containers sealed helps shelf life but doesn’t purge the lines; shaking the lines can move material but won’t remove settled residues and can stress components; keeping equipment at elevated temperature can accelerate deterioration or promote further residue problems.