What size is a fire department connection?
The required number of inlet connections varies depending on the type and demand of the system being served. For fire sprinkler systems, NFPA 13(99) 5-15.2. 2 requires a 4″ pipe size for fire engine connections. Exception #2 allows a single-outlet FDC where piped to a 3″ or smaller riser.
How do I test my fire department connection?
To conduct a hydrostatic standpipe test, a qualified fire safety professional needs to introduce water through a hose connected to both a water supply and a test pump at the lowest point in the system, which is typically from the city water supply to the fire department connection.
What is the purpose of a fire department connection on a building?
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.
Which is a common size of hydrant outlet?
Most fire hydrants have two 2.5 inch hose connection outlets with 7.5 threads per inch (TPI) and one 4.5 inch-pumper connection outlet with 4 threads per inch.
Why do fire hydrants not freeze?
These drain valves are closed when the hydrant is fully open. This means that when water is no longer needed, and the hydrant valve is closed, it will drain, and not freeze solid.
How many FDCs are required?
A typical standpipe system in a fully sprinkler protected facility may need up to four (4) FDC inlets to satisfy the system demand.
Are FDCs required?
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 5 year hydrostatic test?
Since the inception of NFPA 25 in 1992, hydrostatic testing has been required on specific systems typically at five-year intervals. It is conducted to verify the integrity of a system. Typically, the requirement has been to test systems at 200 psi or 50 psi above the maximum pressure for two hours.
When attacking a vehicle fire crews should?
When attacking a vehicle fire, crews should: Approach at a 45-degree angle from the side of the vehicle. Which type of alternative vehicle fuel has a flame that is invisible during the day and should be allowed to burn itself out?
What is PIV valve?
Installed in the main water line serving a building, the Post Indicator Valve (PIV) is a valve used to control the water supply to the fire sprinkler system. The PIV has a display that shows whether water is being pumped into the system (“OPEN”) or not (“CLOSED”).
What is a fire department connection?
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.”
What is fire department sprinkler 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 a fire department Siamese connection?
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).
How does a FDC work?
The FDC allows the engine to hook up and supply the sprinkler system to help extinguish the fire. Water pressure loses about 5 psi every floor, so if there’s a fire on the 20th floor, there wouldn’t be very much water coming out of the sprinklers at all after the initial building supply ran out.