[Scan-DC] Apparent working fire in PG

[b_thom at juno.com]

On Wed, 25 Mar 2009 23:18:07 -0400 <gary.mcginnis at dot.gov> writes:
> Air units refill the self contained breathing apparattus (SCBA) that 
> firfighters wear / use for fresh air. Usually called tanks but 
> actually the proper term is a cylinder.

On Thu, 26 Mar 2009 03:22:27 +0000 ltbrown122 at aol.com writes:
> An Air unit is actually an air cascade unit - it is used to refill 
> the SCBA air bottles after the firefighters come out of the fire so 
> they don't have to go out of service to refill them.

Thanks. I learn something every day. The tanks are good for about twenty
minutes, I believe another lister said, right? If they are refilled at a
truck, what sort of operating pressure  do they have?
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