Which statement about galvanized pipes is correct?

• A. They shall not be used.
• B. They are recommended for these systems.
• C. They are optional.
• D. They must be installed in every section.

Answer: (A)

Galvanized pipes are not allowed in these systems because the piping must be compatible with the extinguishing agent and resistant to the harsh kitchen environment. The wet chemical or other agents used in commercial kitchen fire suppression can corrode galvanized steel, leading to leaks, contamination of the agent, and potential system failure. Approved materials—such as stainless steel, copper, or specific plastics—are specified for use with the system to ensure reliability and safety. Therefore, stating that galvanized pipes shall not be used best fits the requirements, while claiming they’re recommended, optional, or required in every section would contradict the need for approved, compatible materials.