Podcast
Questions and Answers
What is the maximum flow for a Blitz Fire stream?
What is the maximum flow for a Blitz Fire stream?
Which hose size has the highest friction loss for a flow of 200 GPM?
Which hose size has the highest friction loss for a flow of 200 GPM?
What is the pressure required for a master stream with a stack tip of 80 PSI?
What is the pressure required for a master stream with a stack tip of 80 PSI?
For a 3" hose, what is the friction loss at a flow rate of 325 GPM?
For a 3" hose, what is the friction loss at a flow rate of 325 GPM?
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Which tip size produces the highest flow rate in the Master Streams table?
Which tip size produces the highest flow rate in the Master Streams table?
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Which type of hose has a friction loss of only 5 PSI at a flow of 250 GPM?
Which type of hose has a friction loss of only 5 PSI at a flow of 250 GPM?
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What is the friction loss for a flow of 400 GPM?
What is the friction loss for a flow of 400 GPM?
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What is the flow rate of the Elkhart Brass Scorpion fog nozzle?
What is the flow rate of the Elkhart Brass Scorpion fog nozzle?
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Study Notes
Master Streams
- Master stream tip sizes and corresponding flow rates (GPM):
- 1-3/8" -> 500 GPM
- 1-1/2" -> 600 GPM
- 1-3/4" -> 800 GPM
- 2" -> 1000 GPM
- Operating pressure for master stream stack tip is 80 PSI.
Blitz Fire
- Blitz fire tip sizes and GPM:
- 1" -> 250 GPM
- 1-1/4" -> 400 GPM
- 1-1/2" -> 600 GPM
- Maximum flow set at 500 GPM.
Handline 3" Hose
- Handline tip sizes and GPM:
- 1" -> 200 GPM
- 1-1/8" -> 250 GPM
- 1-1/4" -> 325 GPM
- Handline stack tip operates at 50 PSI.
Friction Loss in Hose
- Calculated per 100 feet of hose.
- 1-3/4" hose friction loss:
- 95 GPM -> 15 PSI
- 125 GPM -> 25 PSI
- 150 GPM -> 35 PSI
- 200 GPM -> 60 PSI
- 1-1/4" Key Combat Hose friction loss:
- 95 GPM -> 5 PSI
- 125 GPM -> 10 PSI
- 150 GPM -> 15 PSI
- 200 GPM -> 30 PSI
- 2-1/2" ECO-10 Hose friction loss:
- 250 GPM -> 10 PSI
- 300 GPM -> 20 PSI
- 350 GPM -> 25 PSI
- 500 GPM -> 50 PSI
- 3" Hose friction loss:
- 250 GPM -> 5 PSI
- 325 GPM -> 10 PSI
- 500 GPM -> 20 PSI
- 5" Hose friction loss:
- 750 GPM -> 5 PSI
- 1000 GPM -> 10 PSI
- 1250 GPM -> 15 PSI
- 1500 GPM -> 20 PSI
Fog Nozzles
- Common fog nozzle specifications:
- 1-3/4" Akron -> 200 GPM at 100 PSI
- 1-3/4" Metro 1 -> 150 GPM at 75 PSI
- 2-1/2" Metro 2 -> 250 GPM at 50 PSI
Ladder 34 Elevated Master Stream
- Uses Elkhart Brass Scorpion 3-1/2 fog nozzle, rated at 1250 GPM at 75 PSI.
Appliance Loss
- 0 PSI for flows below 350 GPM.
- 10 PSI for flows over 350 GPM (applies to reducers, gates, wyes, water thief, manifolds).
- 25 PSI for master streams at or above 350 GPM (deck gun, ground monitor, blitz fire).
Elevation Loss
- Loss of 5 PSI per 10 feet after the first floor.
- Standpipes and sprinklers require an initial 150 PSI plus 5 PSI for each additional floor.
Other Calculations
- Engine pressure formula: EP = FL + NP + AL + EL
- 5" hose calculation: holds 1 gallon per foot (e.g., 400' hose = 400 gallons).
Key Abbreviations
- NP = Nozzle pressure
- FL = Friction loss
- AL = Appliance loss
- EL = Elevation loss
- EP = Engine pressure
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Description
Test your knowledge on fire hose flow rates, including master streams, blitz fire, and handline hoses. This quiz covers various tip sizes, GPM, and the corresponding friction losses for different hose types. Perfect for firefighters and those in the emergency services field!
