Which option correctly lists the three standpipe classes?

• A. Class 1 - Fire Personnel Only; Class 2 - Occupants Only; Class 3 - Both Fire/Occupants
• B. Class 1 - Fire Personnel Only; Class 2 - Occupants Only
• C. Class 2 - Occupants Only; Class 3 - Both Fire/Occupants
• D. Class 1 - Fire Personnel Only; Class 3 - Both Fire/Occupants

Answer: (A)

Standpipe classifications define who the system is designed to serve. Class I outlets are 2.5-inch hose connections intended for fire department use, not typically for occupants. Class II systems provide built-in 1.5-inch hoses at outlets for occupants or building personnel to use in the initial stages of a fire. Class III combines features: it has 2.5-inch supply connections for firefighters and also 1.5-inch hose outlets for occupants, offering both options.

The option that correctly maps these roles—Class I for fire personnel only, Class II for occupants, and Class III for both fire personnel and occupants—is the best choice. The other options mix up which class serves occupants or firefighters.