Tank maintenance
As the diving tanks work at extremly high pressures they are subject to strict regulations regarding the service and maintenance.
The technical services like the visual inspection and the hydrotest are an obligation for certified companies. The visual inspection is done to check the tank for damages due to moisture or impacts and to determine that it’s still right for using. The hydrostatic test has to be carried out to control, that the tanks will endure the extreme pressures they are subjected to. The dates of services carried out are shown on the tank by a VIP sticker and a hydrotest stamp.
The intervals for the visual inspection and the hydrostatic test are different for steel and aluminium tanks and may vary according to local law.
If the tanks are used heavily or filled in humid environment the visual inspection should be done at least once a year. Also, the tank should be examined if it was completely emptied.
The check you should do on your tank should include a control of the hydo test stamp and the VIP sticker dates as well as an inspection of the outside of the tank walls and valve for any corrosion or damages.
If your tank’s test intervals are overdue or it’s in poor condition, no responsibly working filling station will fill it again.
After the dive rinse your tank with fresh water, if it has a boot, either remove it or make sure the water can run out, to avoid that the humidity causes corrosion. Open the valve shortly to blow out water from its opening.
To store the tank make sure that you never leave it completely full or completely empty. If the tank is completely full it might crack if it’s stored for a long period, if it’s completely empty, humidity can get into the tank, this can cause corrosion. The best is to store it in a cool and dry place with a remaining pressure between 10 and 20 bar, in an upright position, protected from falling down.
To get advice ask the instructors, or share your opinions with other divers in the diving equipment forum.
Look at the diving center directory to find a dive shop or diving center in your region.
All information and opinions provided are general and no substitute for professional advice. Always check with professional diving equipment technicians!
