Where should the Fire Department Connection (FDC) be located in a single zone dry system?

The Fire Department Connection (FDC) should be located between the dry pipe valve and the control valve in a single zone dry system because this positioning allows for efficient access by the fire department to charge the system with water in the event of a fire emergency. By placing the FDC in this location, firefighters can effectively fill the system with water while ensuring that the dry pipe valve, which controls the flow of water to the sprinkler heads, remains operational.

This setup is critical because the control valve is the point where the sprinkler system can be isolated from the water supply. If the FDC were placed at the riser or between the dry pipe valve and the sprinkler heads, it might impede the operation of the system and complicate the task of supplying water. Properly connecting the FDC in the designated location simplifies the process, enables rapid response, and ensures the sprinkler system functions correctly during an emergency.