It is always necessary to verify if a pin is present
on the fire extinguisher; should the opposite occur, it is necessary to consider him
as unusable and to take the other one.
All the used fire extinguishers are then put on the ground
to indicate that they are already used and thus
unusable has new without the intervention of a professional of
fire extinguishers. But before, they must be completely
empty and for it, we have to continue to use them even
if there is not a fire anymore.
