The air tank is an old spent fire extinguisher. The stock valve was removed and the insides were cleaned out. Out of curiosity, [Giorgos] figured out the volume by filling the tank with water ...

After coming in contact with the chemicals of a fire extinguisher, the Director of ... Leave the environment to get fresh air when possible can help avoid unnecessary exposure to toxins.

Some fire extinguishers can be recharged if the pressure gets low, assuming there is no other damage to the unit. Likewise, if you use the extinguisher, you may be able to recharge it rather than ...