Which statement best describes the required characteristics of storage tanks for foam concentrates?

Which statement best describes the required characteristics of storage tanks for foam concentrates?

• A. They may be constructed of any material
• B. They may be relocated without inspection
• C. They shall be constructed of materials compatible with the liquid, solidly mounted, and permanently located
• D. They do not require permanent location

Answer: (C)

Foam-concentrate storage tanks must be constructed of materials compatible with the liquid, solidly mounted, and permanently located. This combination ensures reliable performance and safety in foam-water systems. Material compatibility matters because foam concentrates can be reactive or corrosive to certain metals and coatings. Using a tank material that’s not compatible can cause degradation, contamination, or leaching of additives into the concentrate, which can impair foam quality and system effectiveness. Being solidly mounted prevents movement that could stress connections, cause leaks, or misalign piping and fittings linked to the foam proportioning system. A stable, rigid setup reduces the chance of damage from vibration, impact, or seismic events and supports consistent metering of the concentrate. Locating the tank permanently ensures the system has a fixed, known supply source, simplifies inspection and maintenance, and prevents cross-contamination or dilution that could occur if the tank were moved or substituted. It also ensures the required accessibility and arrangement for testing and replenishment. The other options fail because they allow incompatible materials, movement or relocation without inspection, or a non-permanent location, all of which undermine safety, reliability, and code compliance.

Foam-concentrate storage tanks must be constructed of materials compatible with the liquid, solidly mounted, and permanently located. This combination ensures reliable performance and safety in foam-water systems.

Material compatibility matters because foam concentrates can be reactive or corrosive to certain metals and coatings. Using a tank material that’s not compatible can cause degradation, contamination, or leaching of additives into the concentrate, which can impair foam quality and system effectiveness.

Being solidly mounted prevents movement that could stress connections, cause leaks, or misalign piping and fittings linked to the foam proportioning system. A stable, rigid setup reduces the chance of damage from vibration, impact, or seismic events and supports consistent metering of the concentrate.

Locating the tank permanently ensures the system has a fixed, known supply source, simplifies inspection and maintenance, and prevents cross-contamination or dilution that could occur if the tank were moved or substituted. It also ensures the required accessibility and arrangement for testing and replenishment.

The other options fail because they allow incompatible materials, movement or relocation without inspection, or a non-permanent location, all of which undermine safety, reliability, and code compliance.