High-Pressure Vs. Low-Pressure Scuba Tanks

Scuba divers have a choice in scuba tanks, either low-pressure-rated or high-pressure-rated. Each of these types of tanks has benefits and limitations.

Tank Capacity

The greater the pressure input into a scuba tank, the greater the amount of air that will be held in reserve for the dive.

Tank Size

Lower-pressure scuba tanks will require a larger size of tank to hold the equivalent capacity of air reserve to a higher-pressure tank of the same size.

Pressure on Equipment

Higher pressure can cause increased wear on scuba equipment, such as o-rings, valves and regulators. When using high-pressure tanks, it is advised to inspect equipment regularly and be sure to use equipment intended for use with high-pressure systems.

Valve Considerations

Valves and components used in conjunction with high-pressure tanks must be strong enough to work with higher pressures. When choosing valves for a scuba tank, divers are advised to be certain that the valves they choose are equal or greater to the pressure limitations of their tanks.

Filling Station Limitations

Not all filling stations are capable of filling high-pressure tanks, especially if "overfilling" is needed. This may present a limitation for air capacity when using smaller, higher-pressure scuba tanks.

References

• Low Pressure Vs. High Pressure Scuba Tanks

Resources

• Diver's Emporium Scuba Tank Information