The first Supertens were sold with a steel bottle with rounded base, these should no longer be used and anyone with this type of bottle should replace it with a new aluminium bottle. Aluminium bottles without a PI * mark on them should be tested after five years of date of manufacture, bottles with the π mark should be tested after ten years. For details of how to have a bottle tested contact Luxfer Gases +44 (0)115 980 3800 or Midland Diving Centre +44 (0)116 212 4262.
CAUTION: Only dry breathing quality or dry divers’ air should be used in any pre-charged gun. Do not attempt to fill the buddy bottle with oxygen or any other gas doing so could cause a serious explosion.