Which standpipe system relies solely on the fire department connection to supply the water and is dry when not in use?

Which standpipe system relies solely on the fire department connection to supply the water and is dry when not in use?

• A. Manual
• B. Wet
• C. Dry
• D. Semi-Wet

Answer: (A)

A dry standpipe. The key is that the piping is empty (dry) when not in use and water is supplied from an external source through the fire department connection. Firefighters connect to the FDC and open the control valve to push water into the standpipe and discharge through the outlets. Wet standpipes, by contrast, are always filled with water and pressurized, so they don’t rely on the FDC for initial supply. This dry configuration helps prevent freezing and ensures water is available at the scene when the fire department makes the connection.

A dry standpipe. The key is that the piping is empty (dry) when not in use and water is supplied from an external source through the fire department connection. Firefighters connect to the FDC and open the control valve to push water into the standpipe and discharge through the outlets. Wet standpipes, by contrast, are always filled with water and pressurized, so they don’t rely on the FDC for initial supply. This dry configuration helps prevent freezing and ensures water is available at the scene when the fire department makes the connection.