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

What is the purpose of a Fire dept connection ( FDC )? Allows FIre dept to pump supplemental water into a standpipr system or sprinkler system.

Which is the most common type of FDC connection?

One of the most common FDCs, known as a Siamese or two-way connection, has two 2 1/2-inch female swivel connections. NFPA requires that all fire department connections use 2 1/2″ National Hose (NH) threaded female couplings unless the authority having jurisdiction designates another specific connection type.

Why is a Siamese connection used?

Siamese connections are to be equipped with plugs or caps. This is to prevent dirt and other foreign objects from entering the piping, which would inhibit water flow or prevent the connection from being used during an emergency.

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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Why is it dangerous to work below the hot gas layer without attempting to cool it?

Why is it dangerous to work below the hot gas layer without attempting to cool it? The hotter the gas layer is, the more toxic the fumes are. The smoke contains fuel, and it may ignite at any time.

What are the components of a standpipe system?

While each system can vary, a standpipe generally consists of an interconnected series of pipe, pumps, valves, alarms, drains, and fire department connections. Over the course of this article and the next, we’ll discuss each of these components in detail including maintenance and regulatory requirements.

What pressure 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. If your pumper is equipped with a multi stage pump, place the pump in the volume stage.

What does FDC mean?

FDC

Acronym Definition
FDC Floppy Disk Controller
FDC Factory Direct Craft (Springboro, OH)
FDC First Data Corporation
FDC Funds Dissemination Committee (Wikimedia)

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What is a Storz connection?

Invented by Carl August Guido Storz in 1882, a Storz connection is a type of hose coupling used to connect large diameter hose to a fire sprinkler or standpipe system. Storz solves a common problem faced by firefighters: mismatches between couplings.

How does a Siamese valve work?

Siamese FDCs will contain either a single or double clapper to channel the flow of water coming into the system. If two hoses are connected, the equal pressure will cause the clapper in the middle of the body to let water flow in from each side. Double clappers provide greater control.

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How does a fire riser work?

As a fire sprinkler discharges, water flows out of the pipe, or branch line, it’s connected to. When that happens, water moves through the system riser to refill the branch line. These changes in flow and pressure are monitored at the riser by electronic devices called water flow switches.

How do Siamese connections work?

Inspired by the Y-shaped Siamese twins, a Siamese connection is a Y shaped fire department connection with two female inlets through which firefighters can attach two hoses and refill standpipes or sprinkler systems with water. The siamese connection is alternatively called FDC ( Fire Department Connection ).

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.

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