Air & Gas Fills

Pure Fills for Every Diver

The Great American Diving Company is a full service fill station. Each of our locations can provide you with air fills from their on-site compressors. All air is tested on a quarterly basis by Trace Analytics and the air quality certificates are available for your inspection. Air fills are $5.00 per cylinder.

Nitrox, Oxygen, Trimix and Argon fills are also available. All fills are done by our oxygen clean system at our Main Street St. Charles store but you can conveniently drop off and pick up your cylinders at any of our locations and we'll take care of the drive for you.

• Nitrox fills are $12.00 / cylinder for up to 50% O₂ and $15.00 / cylinder for up to 100% O₂.
• Oxygen fills are $0.40 / cubic foot
• Argon fills are $0.80 / cubic foot
• Helium fills are $1.90 / cubic foot
• Trimix fill costs are computed based upon the fill requested and the above prices

Certification cards are required for all air fills, Enriched Air certification cards are required for all Nitrox fills, technical diver certification cards are required for all Oxygen, Helium & Trimix fills.

All takes being filled must have current visual inspection decals identifying the facility that performed the inspection and a current hydrostatic test stamp. Cylinders receiving oxygen, nitrox or trimix fills must also be oxygen clean and have a current oxygen clean decal. The Great American Diving Company reserves the right to inspect all cylinders prior to filling and to reject any deemed unsafe based upon current industry and US DOT standards.