Which statement is true regarding mixing foam concentrate brands?

Which statement is true regarding mixing foam concentrate brands?

• A. Different brands of the same type may be mixed if compatibility data provided by the manufacturer is accepted by the AHJ.
• B. Different brands of the same type can be mixed regardless of compatibility data.
• C. Different brands of different types may be mixed for storage.
• D. All brands may be mixed without regard to type or compatibility data.

Answer: (A)

Compatibility and approval by the AHJ when mixing foam concentrates. In foam-water systems, you shouldn’t blend concentrates from different brands unless the manufacturers provide compatibility data showing the blends will perform safely, and the Authority Having Jurisdiction has accepted that data for the specific installation. This ensures the mixed solution preserves foam quality, avoids precipitation or phase separation, and doesn’t damage the system. When the compatibility data exists and is approved, mixing different brands of the same foam type is allowed. Without that data, or if the brands are of different foam types, mixing can lead to unreliable foam performance or equipment problems, so it isn’t permitted.

Compatibility and approval by the AHJ when mixing foam concentrates. In foam-water systems, you shouldn’t blend concentrates from different brands unless the manufacturers provide compatibility data showing the blends will perform safely, and the Authority Having Jurisdiction has accepted that data for the specific installation. This ensures the mixed solution preserves foam quality, avoids precipitation or phase separation, and doesn’t damage the system. When the compatibility data exists and is approved, mixing different brands of the same foam type is allowed. Without that data, or if the brands are of different foam types, mixing can lead to unreliable foam performance or equipment problems, so it isn’t permitted.