How are fire department connections used?

The Fire Department Connection (FDC), also know as the Siamese Connection, is an important component found on most sprinkler and standpipe systems. When a sprinkler system activates, the fire department connects hose lines from a pumper truck to the fire department connection.

What is the purpose of a fire department connection FDC )?

A Fire Department Connection ( FDC ) is “A connection through which the fire department can pump supplemental water into the sprinkler system, standpipe, or other system, furnishing water for fire extinguishment to supplement existing water supplies.” FDCs are required on all standpipe systems per NFPA 14, Standard for

How high can a fire department connection be off the ground?

Fire department connections ( FDC ) shall be located not less than 18 inches and no more than 48 inches above the level of the adjoining ground (NFPA 14 Section 6.4.

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What is a fire department connection Clapper?

Clappers guide water through fire department connections Pressurized water moving through fire department connections can close built-in clappers. These clappers prevent water from exiting through open inlets. On an FDC with two or more inlets, clappers allow firefighters to add or remove hoses as needed.

What is an FDC sign?

Fire Department Connection ( FDC ) signs allow for fire department personnel to easily determine the location of a building’s water supply port in event of a fire. Glow-in-the-dark signs ensure the fire department can easily find connections during an emergency or blackout.

What do you pump a FDC at?

All pumpers will pump their capacity at 150 psi at the pump, so increase the throttle slowly until your discharge pressure is at 150 psi while being careful not to run away from your water supply.

What psi do you pump into a standpipe?

Therefore, the minimum hose valve outlet pressure at 250 GPM total standpipe flow is 100 psi, and the minimum hose valve outlet pressure at the maximum standpipe flow is 100 psi.

How does a standpipe work?

A standpipe is an open-ended, metal pipe that can be screwed into a basement floor drain to permit the flow of water back up as high as necessary, thereby delaying or preventing a basement flood.

What is an FDC unit?

Posted May 28, 2020 by Koorsen Fire & Security. FDC stands for Fire Department Connection. It is part of a fire sprinkler system or standpipe system. Though easily overlooked by most, the FDC’s role in ensuring the effectiveness and success of a fire sprinkler system to suppress a fire is pivotal.

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Is a PIV required?

Up until the 2010 Edition, NFPA 24 required a listed post indicator valve on every connection from a private fire service main to a building unless special criteria were met (NFPA 24 Section 6.3).

What type of sprinkler system is not required to have a fire department connection?

A fire department connection ( FDC ) is required for most NFPA 13 and 13R automatic sprinkler systems and standpipe systems. They are not required for automatic sprinkler systems protecting one- and two-family dwellings and townhomes.

How far can an FDC be from a fire hydrant?

I. FDCs shall be no more than 150 feet from a public hydrant. The FDC may be located within 150 feet of a private hydrant if the FDC is connected to the fire sprinkler system by a dedicated pipe that connects on the system side (i.e., downstream) of the sprinkler system check valve.

Can you park next to a fire department connection?

Unless the curb in front of it has unrelated marked rules, feel free to park in front of it. That is called a siamese connection; it is linked to a building’s standpipe system. You can park in front of one.

Why it is called Siamese connection?

A siamese connection or splitter in fire protection engineering is a pipe fitting that allows two or more fire hoses to be connected to a single standpipe riser at the same general location. It is so- called due to the visual similarity to siamese twins.

What type of sprinkler system is full of water under pressure at all times?

Wet-Pipe Sprinkler System This type of system is the most common and is typically the easiest to design, install, and maintain. Wet-pipe systems contain water under pressure in the overhead piping at all times and utilize a series of closed sprinklers.

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