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Course Outline

Your dive center can help you with any issues with your cylinder. Further professional training is required to do any maintenance work on the valve or cylinder. The following are general common-sense rules and guidelines when dealing with scuba cylinders.

  • Get your cylinder filled only by a reputable dive center.
  • Don’t have them overfilled. If the + indicator is stamped on a steel cylinder, 10% over the rated pressure is okay. Aluminum cylinders must never be overfilled.
  • Never fill a dedicated oxygen cylinder with any other gas. Fill with oxygen ONLY. If you do fill with any other gas by mistake, empty the cylinder. Do NOT refill with oxygen before it has been oxygen cleaned by a qualified certified technician.
  • Don’t completely empty a cylinder during a dive. Leave some remaining pressure inside because this keeps moisture, along with the increased likelihood of corrosion, out.
  • Have all inspections, tests, and repair work completed by formally trained and certified technicians (once a year).
  • Personally inspect your cylinder before every dive.
  • Store cylinders upright with 20 to 30 bar/300 to 500 psi of pressure in them.
  • When assembling equipment, never leave an unattended cylinder standing up.
  • Handle cylinders carefully so they don’t drop or fall over.
  • Inspect the valve outlet O-rings.
  • After diving, once you remove the regulator, partially open the cylinder valve to blow out water droplets that may accumulate.
  • Keep the cylinder away from heat as much as possible.
  • Always analyze your gas before equipment assembly to verify cylinder content.
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