Class I and Class III standpipes require how many FDC connections?

• A. One
• B. Two
• C. Zero
• D. One or More

Answer: (D)

Fire department connections exist to supply water from external sources into a standpipe system. Both Class I and Class III standpipes rely on this external connection, so there will be at least one FDC, but the exact number depends on how the system is laid out in a building. In smaller buildings, one FDC may be enough, while larger or more complex buildings with multiple standpipe risers or exterior access points may require additional FDCs to serve all zones and elevations. Because of this variability, the correct understanding is that there can be one or more FDC connections.