Just getting some input the ups and downs of using a 2 1/2 inch line as a IA attack line would like all input. thanks

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In my department...no. If you have the people to move it and can make an effective attack with a large volume of fire then more power to ya. I wouldn't rule it out, but as a common place tactic I think it has too many negatives. If you can make a differance then go for it. You can always break it down into a wye and run hotel/structure bundles off of it when you don't need it anymore.
We use inch and a half lines and have no problems at all. One man can advance it with no problem if need be.
I view 2 and a half as supply line and see no reason to stick a nozzle on it......but to each their own, and good luck moving the supply line once its charged!!!
In my country we use 1 1/2 for interior attack and 2 1/2 for exterior operations. It's pretty rare for interior or never experience it to use 2 1/2 lines for attack.
I'm not horrified, I thought others may be!

Hose reel differences? From all I've read (on forums) I have the impression that the reels that used to be common in Norh America were very different to the HP reels used in Europe and here. My Brigade pump's own reel has 70 metres of 25mm internal diameter hose that is run at around 3000 kPa. (230 feet, 1 inch, 435 psi) Our career pumpers have a 90 metre hose and a larger pump. If I'm now to be told that hose reels used over there are similar, I'm happy to sit corrected :-)
Yes it is, on my engine we run 1- preconnect 1 3/4" trash line on the front bumper, 2- preconnect crosslays 1- 13/4" 1- 2", and run a 2 1/2" preconnect of the hosebed. So the option is there based on the size of fire and personnal. But I prefer the 2" for more water and it isn't much different than an 1 3/4". Highly recommended.
Michael wow 2.5" supply line with a nozzle on it???? Thats funny. Your 1.5" attack line is flowing at most 125 gpm with 60-70lbs of NR and tremendous amount of FR.

1.75" lines offer more water, less FR and coupled with the right nozzle it can offer FAR less work for your firefighters to manuever... like 40-50lbs NR less. Besides the average household furnishings require about 170-175 gpm now-a-days for proper interuption of the fire curve. This leads me back to my comment of where do you want to interrupt the fire curve...

You must think our 5" LDH is overkill too?

DT- Not many around us have 2". But I loved the gpm it offered when we did use it...
I have used 2 1/2 attack lines with other companies and I do not care for them on interior attacks, we usually do not have adequate manpower on our first due engine to assist with advancing that size line, if anyone has ever had the pleasure of trying to maneuver a charged 2 1/2 up and around a stairwell with a very tight stairlanding to begin with ,then u know where i am coming from. I was also on the receiving end of a 2 1/2 in a structure because a 2nd crew came in the back door where the fire originated while my crew was advancing toward the fire through the front, and i thought we crawled into a tornado,lol . and they blew the fire through the roof. other words i hate them. we have a 3" line preconnect on our first engine that we use if ther is no interior attack being initiated due to heavy involvement, and that itworks perfectly.
WOW FETC - other people in other places seem to be doing perfectly well with their equipment and systems. Strange isn't it?
After years of watching too small a line pulled in the first place, I remember my asst. chief standing on a pile of charcoal spraying water from a forestry can, that eventually took app 30,000 gallons of water to extinguish , a conservative mindset must be overcome. It took years to get rid of soda and acid, then high pressure fog, and now we have foam, NEVER be afraid to pull a big line. It is water that deals with fire.
Twenty years ago I was teaching FF1 at a midsize dept along the Mn Ontario border, and was sitting in a restaurant before the class getting supper, and noticed a guy running out the back door from a body shop across the street. I could see by his gait he was not going over to the gas station to take a poop, then a not sogentle puff of smoke from around the doors. I decided to put my gear on ipo taking photos, and was standing in the street when my students pulled up with the pump. I hollered "big Line", and they put the fire out with the 2-1/2 just like that, and the two cars in the shop were started and driven out. It takes an entire engine co of 5 men to handle a 2-1/2 . Ya gotta train for it.!!!
For IA exposure coverage maybe, providing you have a great water source. Thats not to mention the wear and tear it puts on your personnel, too much line inside.
Big fire.... big hose... small fire... smaller hose. 2-1/2" hose is going to wear you out but you have ALOT of water. 1-3/4" is easier to maneuver and lighter... but not as much water. If I was thinking about pulling a 2-1/2" I would also think about whether this should simply be an external defensive attack.

My $.02...
Tony P,

I know you are a high pressure guy and that has no relation to the agruement about 2.5" interior attack lines used in the US. As I stated two pages ago, you can piss on it and eventually the fire will go out, it just depends on how fast you want to stop the fire growth and what you want to actually save...

So I guess the larger cities are doing it all wrong then... we all need high psi little lines right with zero roof ventilation.

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