Firefighter Training Drill: Do the Twist: FDC Hook Up - Fire Engineering: Firefighter Training and Fire Service News, Rescue

2022-05-14 22:27:06 By : Ms. Demi Lin

Not every fire department will encounter fire department connections (FDC) in their response area. For those departments that are covering suburban and urban areas, you will encounter them. FDCs are not just reserved for high-rise buildings. They will be found on single-story large structures, low-rise buildings, and parking garages.

FDCs will be located on the outside of the building at a spot to be accessible by the fire department; this may be by the front entrance of the building. Some buildings will have the FDC located away from the building and standing alone like a pressure-reducing valve by the street. Regardless of the location, they are designed to allow the fire department to provide water on the inside for interior operations.

The “Ins” and “Outs” of Fire Department Connections

Fireground Operations Using Fire Department Connections (FDC)

FDC Tandem Pumping: High-Rise Building Fire Pumping Operations

There are two types of FDCs: threaded and storz. The storz type will be a single inlet of either 4, 5, or 6 inches, depending on the structure itself and the department’s specifications for their local building code. With the storz being a sexless coupling, there is no problem that can occur when connecting except for damaged lugs on the coupling or the coupling not being perfectly round and somewhat oval, making it difficult to connect.

A problem that can occur with the threaded FDC is the seizing of the couplings on the FDC. Female couplings are present on every FDC and allow the male coupling to be threaded into the FDC. With exposure to weather, dirt, and rust, the couplings on the FDC can seize up and not be free enough to spin. When this happens, the male thread cannot be connected.

One way to alleviate this problem is to twist the hose in the opposite direction about five or six times. This twisting of the hose allows the hose to untwist in the right or clockwise direction while at the same time allowing the male coupling to be threaded into the female coupling without spinning the female coupling.

Preplanning will also alleviate this problem by checking to see if the couplings spin freely or not. If they do not, the property owner needs to be notified so that they can fix the problem.    

Equipment needed: Two 2 ½-inch length of hoses, spanner wrench, access to an FDC

Goal: To practice securing the FDC using the twist method with the hose

Mark van der Feyst has been in the fire service since 1999 and is a full-time firefighter in Ontario, Canada. He is an international instructor teaching in Canada, the United States, and India, and at FDIC. Van der Feyst is a local level suppression instructor for the Pennsylvania State Fire Academy. He is also the lead author of Residential Fire Rescue (Fire Engineering Books & Video).


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