What is an FDC connection?

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

What is a Siamese connection used for?

The Fire Department Connection, also commonly known as the siamese connection, is an important component found on most sprinkler and standpipe systems. When a fire sprinkler system activates, the FDC provides a means for firefighters to connect hose lines to supplement the fire sprinkler system’s domestic water supply.

What is an FDC Clapper?

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. If the flow of water to one hose stops (or a hose bursts) a clapper will close to prevent backflow.

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What pressure do you pump a FDC?

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.

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.

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 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.

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.

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.

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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 ).

What is a standpipe system?

Standpipe systems are a series of pipe which connects a water supply to hose connections that are intended for fire department or trained occupant use. At times building are provided with only piping for the standpipe system.

What does auto spkr mean?

connection you will see ” auto spkr ” which means it is connected to the automatic fire sprinkler system. If there is more than one it should also indicate which areas it covers. Some FDC’s only are connected to a standpipe.

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.

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