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 ...
Read more: 5 Lesser-Known DeWalt Tools That Can Come In Handy Around Your Home When you buy a traditional fire extinguisher, you should see the acronym "UL" somewhere on the label. That stands for ...