How To Make A Portable Air Tank From A Fire Extinguisher

Take an old fire extinguisher and turn it into a useful portable air tank.

I used a 5lb ABC dry chemical fire extinguisher. These commercial tanks are pressure tested to 3x their operating capacity (195psi) to 585psi. However, dealing with pressure vessels is never considered safe especially when modifying them. Be careful out there…

See Also: How To Make A Portable Air Tank From A Propane Tank

Simply the best lock-on tire chuck ever made:

Brass tank valve:

1/8npt tap:

What’s inside a Fire Extinguisher?

What’s the YELLOW powder in ABC fire extinguishers? It is mainly 60% mono ammonium phosphate (common plant fertilizer) and 40% Ammonium Sulfate (another common plant fertilizer) with a tiny bit of the natural mineral Mica and yellow dye. BC fire extinguishers are just plain white baking soda. The yellow dye in ABC extinguishers sets them apart from BC dry powder units.

YouTube channel What’s Inside? We cut open a fire extinguisher to see how it works, but first, they had to test it and have some fun…