What is a master stream appliance?
132 MASTER STREAM APPLIANCES. Master stream appliances are large-caliber devices that are used. primarily during defensive operations. Conditions on the fire ground may be deteriorating or have already reached that point when these appliances are placed in service.
What is a master stream in firefighting?
The use of a truck-mounted master stream is usually thought of for defensive fire operations. This large water cannon can be used for more than just a defensive fire—it can be used for a quick offensive attack from the outside before crews go in and suppress the fire with regular-sized hoselines.
What is the difference between a handline and a master stream?
The master stream lessens the flames, giving the firefighter on the handline the chance to move in with a more precise attack. Crews can then go interior to finish off the rest or they can stay defensive to keep applying water from the exterior.
What’s considered a master stream?
A master stream is basically defined as a heavy-caliber stream delivered through a master stream water delivery appliance. A master stream is used when flows surpass 350 gallons per minutes (gpm), becoming too difficult to be delivered from a handline operation because of nozzle reaction.
What is the minimum flow from a master stream device?
Master streams are used when large quantities of water are needed to control a large fire. Such a stream can deliver water at a rate of at least 350 gpm (1591 lpm), and some master stream devices can flow more than 2000 gpm (9092 lpm).
What should I pump blitz fire?
- MAXIMUM OPERATING PRESSURE.
- 175 PSI (12 BAR)
- MAXIMUM FLOW.
- 500 GPM (2000 LPM)
What is an effective fire stream?
Effective fire streams consist of three major elements: manageable nozzle reaction, effective reach, and sufficient flow. This series of articles sought to offer ideas and strategies that maximize flow and enhance member safety.
What is a Blitzfire?
About the BLITZFIRE Series The BLITZFIRE™ offers a safe initial attack, even with limited staff. With a flow rating up to 500 gpm (2000 l/min), it integrates an exclusive safety shutoff system that prevents unintentional movement during critical fire-ground operations.
What are master streams used for?
Master streams are an effective tool used to fight and suppress fire, especially in defensive situations or when distance must be maintained while pumping large volumes of water. Master streams, like those mounted on a truck or aerial device, are capable of delivering water anywhere from 500 to 2,500 gpms at 100 psi.
What is the minimum number of firefighters needed to advance?
At least two fire fighters are required to advance and control a large handline, although one fire fighter can control a large handline if it is firmly anchored.
What is an advantage of a straight stream over a fog stream?
What is an advantage of a straight stream over a fog stream? Longer reach. crews are working inside the building. What is the correct method to stop the flow of gas delivered via utility pipeline into a structure?
How big is a master stream in firefighting?
This is to ensure that the stream is being directed where it needs to be for effective fire suppression activities. This operation will take away one firefighter from the engine crew, leaving a three- or four-person crew short one member. Some master streams can be extended up by about two feet as seen in photo 2.
How many liters does a master stream deliver?
A typical master stream mounted on top of a fire apparatus will deliver anywhere from 500 to 1,250 gpms or up to 4,500 liters per minute. There are some that will deliver 5,000 liters per minute or 1,325 gpms.
What can a master stream be used for?
This large water cannon can be used for more than just a defensive fire—it can be used for a quick offensive attack from the outside before crews go in and suppress the fire with regular-sized hoselines. The amount of water that can be delivered by a master stream is vast in comparison to a handline.
Can a master stream be lowered below 0°?
With the master stream retracted, the cab of the apparatus may be in the way, preventing a complete 360° rotation and water application. The master stream can also be controlled to be vertically lowered below the 0° degree plane.