Pipe and associated fittings shall be of ________ material having physical and chemical characteristics compatible with the wet chemical solution.

• A. non-combustible
• B. flammable
• C. wood
• D. metal

Answer: (A)

Pipes and fittings in a wet chemical kitchen system must be noncombustible and physically and chemically compatible with the potassium acetate solution. This ensures the piping won’t ignite or degrade under fire exposure and won’t react with or corrode due to the extinguishing agent, so the system remains intact to deliver the agent when needed. Using a combustible material would add fuel to a fire, and while metal is noncombustible, the requirement emphasizes noncombustible materials in general that are proven compatible with the solution.