Here is what I did last week, following the infos
from an A.I. (USA)
I when to a Diving shop (which sells all the stuff
for people who love to
dress in latex and breathe underwater) they took my
(steel) tank for
hydro testing, it will (hopefully) come back with the
new numbers
stamped on the metal. It has to be done every five
years.
Take a long breath
C.