Originally posted by TheBroz
If yes to both of the above then you are a-ok....... if it says DOT on it, no chance
not strictly true, it can be dual tested (old angel air bottles) and it says hse/dot standard.
as long as it has
a)pi
b) hse
c) hse
and dot on it then it can be used
anything else cannot
hope that clears it all up