a. Dry system - not connected to water supply
1) Interior system has at least one outlet on each floor
2) Exterior system usually runs along fire escape
3) May include multiple interconnected systems
b. Wet system - connected to one or more sources of water
1) Minimum flow of 250 gpm at residual pressure of 65 psi on roof or
2) Minimum pressure of 40 psi on 1-1/8-inch tip connected to 100 feet of 2-1/2-inch hose attached to highest outlet with nozzle on roof
3) May include multiple separate or interconnected risers
3. Fire department siamese
a. Water should be pumped into any standpipe system being used for firefighting
b. At least two lines should be connected
1) First line to left intake and charged
2) Second line to right intake
c. If supply line cannot be connected to siamese, water can be supplied to system through outlet on first floor
d. Pumper should be positioned within 50 feet
4. Fire attack from standpipe systems
1) 150 feet of 1-1/2-inch or 1-3/4-inch hose
3) Gated wye
4) Pipe wrench in the event the hand wheel on outlet missing
5) Secondary standpipe pack consisting of 2-inch or 2-1/2-inch hose
6) Short section (5 feet) of 2-1/2-inch or 3-inch hose to go between outlet and gated wye
7) Gated wye may be equipped with 1-1/2-inch to 2-1/2-inch increaser to permit connection of larger attack hose
b. Beginning attack operations
1) Connect to outlet in stairwell on fire floor (Firefighter I teaches to connect on floor below fire floor)
2) Pull excess hose up stairway toward next floor before charging
3) If outlet in corridor, connect on floor below fire floor
4) Be careful not to impede evacuation or allow great volumes of smoke in stairway
B. Automatic Sprinkler Systems
1. Types of systems
a. Wet system - piping completely filled with water from source to heads
b. Dry system - system contains water only from source to control valve
c. Pre-action system - dry system with air exhausters controlled by heat detectors
d. Deluge system - designed to deliver large volume of water; water only from source to control valve
2. Water supply
a. Can be supplied by gravity tank, pressure tank, fire pump, or water main
b. Engine company should attach two lines to siamese and prepare to pump system
III. Hose and Nozzle Selection (3-3)
A. During the evolutions below, the students will demonstrate their proficiency in the handling and use of various hoses and nozzles used to control and
extinguish a fire.
B. The nozzles will first be reviewed by the instructor. All water will be discharged outside the structure.
C. The student should already be familiar with the appliances required and the techniques involved in the evolutions. What is being emphasized here is teamwork and operating efficiency.
IV. Hose Stream Placement (3-4)
A. The student will perform the following evolutions:
1. Advance an uncharged 1-1/2-inch, 1-3/4-inch, or 2-inch line up an interior stairs to a location above the ground floor.
2. Advance a charged 1-1/2-inch, 1-3/4-inch, or 2-inch line up an interior stairs to a location above the ground floor.
3. Advance a charged 1-1/2-inch, 1-3/4-inch, or 2-inch line down an interior stairs to a location below the entry floor.
4. Advance an uncharged 1-1/2-inch, 1-3/4-inch, or 2-inch line up a ladder to a floor above the ground floor.
5. Advance a charged 1-1/2-inch, 1-3/4-inch, or 2-inch line up a ladder to a floor above the ground floor.
6. Advance a charged 1-1/2-inch, 1-3/4-inch, or 2-inch line to the fire floor and a second charged line of the same size to the floor above the fire floor.
7. Advance a charged 2-1/2-inch line up an interior stairs to a location above the ground floor.
8. Advance a charged 2-1/2-inch line up a ladder to a floor above the ground floor.
9. Advance a charged 1-1/2-inch, 1-3/4-inch, or 2-inch line to the fire floor and a 2-1/2-inch charged line to the floor above the fire floor.