Info needed: Foam extinguishers fitted on trucks

[Jacques Reed]

Originally Posted by Tony Smith

Rather than Water, the Red ones are actually Soda Acid. They contained 2 Gal solution of Bicarb Soda dissolved in water. There was a glass bottle of 50% Sulphuric Acid in the top, which when upturned reacted with the Soda solution to produce Hydrogen Gas and this expanded to expel the water under pressure.

Hi Tony,

I think the gas created in the reaction was CO2 and not hydrogen.
The "Hindenburg" seems to spring to mind! The Germans wanted Helium but were embargoed from it. Bad call.

Cheers,