How to Store Your Scuba Tank Correctly Between Dives

Proper storage of your scuba tank between dives isn’t just about keeping your gear tidy—it’s a crucial step in ensuring safety, extending the tank’s lifespan, and maintaining optimal performance for your next underwater adventure. Whether you're a recreational diver or a seasoned pro, taking care of your tank can prevent corrosion, leaks, and other long-term damage. Here's how to store your scuba tank correctly between dives.

1. Rinse and Dry Before Storage

After a dive, always rinse your scuba tank thoroughly with fresh water. Saltwater is highly corrosive and can cause premature wear, especially around the valve and tank neck. Pay close attention to the valve area, removing any sand, salt, or grit. Once rinsed, dry the tank completely with a clean cloth. Letting it air dry is also recommended to ensure all moisture has evaporated before storage.

2. Store with a Positive Pressure

Never store a scuba tank completely empty. Instead, keep it with a small positive pressure of about 200 to 500 psi (14 to 35 bar). This slight pressure prevents moisture or contaminants from entering the tank and keeps the interior safe from corrosion. A completely empty tank may also develop internal oxidation, especially in high-humidity environments.

3. Keep Upright and Secure

Storing tanks upright is generally recommended, especially for steel tanks. This position minimizes the risk of internal corrosion because any moisture that may be present will settle at the bottom, away from the neck and valve. However, if upright storage isn’t possible, lying tanks horizontally in a stable and secure position is acceptable. Just be sure they can’t roll or fall, which could damage the valve or pose a safety risk.

Use tank holders, racks, or even bungee cords to secure your tanks and prevent them from tipping over or rolling around during storage.

4. Avoid Heat and Direct Sunlight

Scuba tanks should always be stored in a cool, dry place away from direct sunlight and extreme heat. High temperatures can increase the internal pressure of the tank, which can be dangerous. Over time, UV rays and heat exposure can also degrade the tank's exterior paint or markings and contribute to metal fatigue. Ideal storage locations include a shaded garage, dive locker, or a ventilated shed.

5. Inspect Regularly

Even when not in use, scuba tanks should be checked periodically. Look for signs of corrosion, dents, or wear around the valve. Ensure the O-ring is intact and not dried out. If you store tanks for extended periods (e.g., during off-season months), it’s a good idea to visually inspect them at least once a month.

Additionally, always ensure your tanks are within their hydrostatic test and visual inspection dates. Expired tanks should not be used and must be re-tested by certified professionals before diving.

6. Label and Rotate Your Tanks

If you own multiple tanks, labeling them and tracking their fill levels, last inspection dates, and use cycles can help you rotate their usage evenly. This avoids letting one tank sit idle too long, which can lead to internal degradation. Keep a log or simple tag on the tank with key info for easy reference.

7. Valve Protection is Key

Keep the tank valve closed tightly to prevent dust, insects, or moisture from entering. You can also use a valve cap or dust cap for added protection. Be careful not to overtighten the valve—just snug is enough.

Conclusion

Caring for your scuba tank between dives is essential for safety, performance, and long-term durability. By rinsing, drying, storing upright with positive pressure, and inspecting regularly, you ensure your tank stays dive-ready whenever you are. A well-maintained tank not only saves you money but also gives you peace of mind every time you take that giant stride into the blue.