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About Scuba Tank O-Rings

In a scuba tank, the o-ring located at the opening of the air valve creates an airtight connection between the tank and regulator, or air hose.

  1. Description

    • O-rings in scuba tanks consist of soft black rubber and measure from 0.75 cm to 2 cm in diameter.

    Function

    • The o-ring prevents the compressed air in your tank from escaping. Ring failure under water can lead to lack of air and drowning

    Maintenance

    • To keep the o-ring from hardening and cracking, apply silicon-based lubricant after a dive. You can find lubricants at a dive shop.

    Replacement

    • Every o-ring will wear out and you must replace it before your next dive. You can find o-rings at any dive shop. Remove the old one with your fingers or a soft o-ring tool. Hard tools can damage the valve.

    Keeping a Supply

    • Keep a supply of o-rings on hand. You may need a replacement in a hurry and you can't dive safely without them.

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