While servicing a foam system, you discover a low concentrate level, but the owner does not have installation documentation with the concentrate type. How do you determine which concentrate type to use?

While servicing a foam system, you discover a low concentrate level, but the owner does not have installation documentation with the concentrate type. How do you determine which concentrate type to use?

• A. Check with the owner for the historical type.
• B. Use the most common concentrate used on similar systems.
• C. The concentrate tank is labeled with the type of concentrate.
• D. Use a compatible substitute concentrate chosen by the technician.

Answer: (C)

When the documentation isn’t available, the concentrate tank labeling is the reliable on-site indicator of which concentrate to use. The system is designed and tested with a specific concentrate, and the label on the tank confirms that exact type so the proportioning and foam chemistry will work correctly. Using the correct concentrate ensures proper foam expansion, stability, and discharge performance, and helps avoid system damage or unsafe results. Relying on what the owner remembers, guessing based on what’s common on similar systems, or selecting a substitute chosen by the technician can lead to incompatibilities and unsafe conditions. If the label is legible, follow it exactly; if it’s unreadable, pause and obtain the approved concentrate specification from the manufacturer or the system’s service documentation before proceeding.

When the documentation isn’t available, the concentrate tank labeling is the reliable on-site indicator of which concentrate to use. The system is designed and tested with a specific concentrate, and the label on the tank confirms that exact type so the proportioning and foam chemistry will work correctly. Using the correct concentrate ensures proper foam expansion, stability, and discharge performance, and helps avoid system damage or unsafe results. Relying on what the owner remembers, guessing based on what’s common on similar systems, or selecting a substitute chosen by the technician can lead to incompatibilities and unsafe conditions. If the label is legible, follow it exactly; if it’s unreadable, pause and obtain the approved concentrate specification from the manufacturer or the system’s service documentation before proceeding.