12 Water Supply Flashcards
Why is Water a primary extinguishing agent?
- Inexpensive
- Universally abundant
- Ability to absorb heat
- Can be conveyed long distances
- Easily stored
Pressures within the water distribution system?
- Static pressure -pressure when water is not moving
- Normal Operating pressure - pressure during normal consumption demands
- Residual pressure - total available pressure not used to overcome friction or gravity when water is flowing through the system
- Flow pressure - forward velocity pressure at any discharge opening.
Small Gate Duties?
- Safely dismount the apparatus wearing all PPE carrying a radio.
- if riding on a new smeal pumper ensure the coffin doors are electrically opened. -allows for free travel of hose when vehicle is in motion. - parking break must be engaged.
- Retrieve hydrant kit from the driver rear compartment of the unit.
- Place hydrant kit near the hydrant in practical location for Big Gate
- Help Big Gate with the supply line and wait for ready signal
- Return to your position on the unit and relay the ready signal to the driver and officer
- At the scene: safely dismount the unit and uncouple the supply line at the nearest joint.
- Attach the supply line to the appropriate apparatus at the scene. * Utilize the pony length when it is advantageous to do so
- If located at the intake connection, open intake drain valve.
- Communicate to the driver of the apparatus that the line is ready.
- Report to your officer for reassignment.
Big Gate Duties
- Safely dismount the apparatus wearing all PPE carrying a radio.
- Remove the hydrant gate from the rear of the apparatus.
- Wrap 125mm hose around the hydrant
- Stand on the hose and signal Small Gate when ready
- When the apparatus is stopped or when it is safe to do so, remove the streamer cap from the hydrant
- Inspect the barrel of hydrant and connect gate
- Ensure that the drain valve on hydrant gate is in the open position
- Radio or signal driver or sector officer that you are ready to turn on the hydrant.
- Open the hydrant when ordered by driver or sector officer, close drain valve.
- Gather tools, remove kinks in the hose and report to your officer for reassignment.
Hazards to fire hose?
- Mechanical
- Thermal
- Organic
- Chemical
Formula to calculate PDP?
PDP = NP+FL+APL+/-EP
Flow capacities of Hydrants?
Blue/Black/Silver - greater than 5700 LPM
Green - 3800 - 5700 LPM
Yellow/Orange - 1900 - 3800 LPM
Red - Less than 1900 LPM
Three forms of Hydrant gate valves?
- Gated (about 12 turns)
- Compression
- AVK (20+ turns
What are the 4 hydrant rings?
Orange - out of service (non operational)
Blue - Hydrant in use (with permission)
White - Fire department use only
Green - Under construction (do not use - no water)
Reasons to not use the closest hydrant?
- The closer hydrant has significantly lower flow than one more distant
- The closer hydrant may be damaged or out of service
- The hydrant is too close to the building and exposes FF and equipment to the effects of the fire
- The hydrant is on the other side of the street
Alternative water supplies for EFRS?
Rivers
Pools
Pools cisterns
Portable tanks
The 3 basic elements of a water shuttle operation?
- Dump site
- Fill site
- Shuttle
Tanker capacities?
Smaller smeal tanker 4500l
Supertanker 13500l
On board water capacity of the EFRS units?
Pumpers - 1890 l Ladders - 1134 l Tankers - 4500 l Super tankers - 13500 l ATP - 1442 l Mule trailer - 250
The EFRS utilizes hoses in the following diameter?
20 mm Booster reels (tankers/ATP)
38 mm Wildland (seasonal)
44 mm Hi-combat attack hose
65 mm Hi-combat attack hose
125 mm Hi Vol - supply
150 mm Hard suction - lightweight - draft only (Salisbury, smeal pumps and tankers)
150 mm Hard suction - Heavy black - Hydrant and draft (found on some older reserve E-One pumps)
