Nozzles & Equipment
Fire Department Connection
FDC
A fire department connection is the inlet on a building where an engine pumps water into the standpipe or sprinkler system. It lets the pump boost a building's fixed fire-protection piping.
The FDC is how the engine supports a structure's built-in system. The operator pumps into it at a pressure that accounts for the system's own allowance, the attack hose inside, and a floor's worth of elevation for each level climbed.
Getting the FDC pressure right matters because the crew operating off a standpipe outlet upstairs has no view of the panel. The pump discharge pressure is what determines whether their line has what it needs.
Where this shows up
Calculator
Standpipe / High-Rise