I've got an old tank from an air compressor that is being scrapped. I want to mount it into the truck bed, and leave it full of compressed air at all times while driving. Basically, it would become a 'pig.' I'd hook up a schrader valve or a quick connect, and leave a hose in the toolbox or cab. I could even install a pop-off valve set at 100 PSI or so. Having air with me would allow me to air-up tires and provide compressed air when needed.
Does anyone know, first off, if this is legal? It could be dangerous in the event of an accident.