Product Information

When it comes to reliable, no-fuss scuba diving cylinders, aluminium tanks remain a favourite among recreational divers worldwide, and the Thunderbird 80cuft Aluminum Scuba Diving Tank - Cylinder/Valve is a solid example of why. Built from 6061-T6 aluminium alloy and manufactured in North America, this cylinder meets both US Department of Transportation (DOT-3AL) and Transport Canada (TC-3ALM) safety specifications, so you know it's been held to a serious standard. With a water volume of 11.1 litres and a service pressure of 207 bar (3,000 psi), it delivers 77.5 cubic feet of usable gas, making it the classic "80 cuft" workhorse that underpins recreational diving around the globe. It comes complete with a Thermo by Thunderbird convertible K-valve, tank boot, and valve cap, so it's ready to pair with your regulator straight out of the box.

Thunderbird 80cuft Aluminum Scuba Diving Tank - Cylinder/Valve Key Features

Material - Aluminum 6061-T6 Alloy: A high-strength aluminium alloy that won't rust like steel cylinders, making it well suited to saltwater diving environments and reducing long-term maintenance concerns.
Water Volume and Service Pressure: 11.1 litre internal volume rated to 207 bar (3,000 psi), providing 77.5 cubic feet of gas capacity, the standard recreational dive tank volume.
Buoyancy Characteristics: Slightly negative at -0.7 kg when full, transitioning to +1.5 kg positive at 500 psi. This buoyancy shift as the tank empties is a known characteristic of aluminium cylinders and is worth factoring into your weighting setup.
Valve Type - Convertible K-Valve: The included Thermo by Thunderbird chrome-plated brass K-valve features a removable 230 bar (3,336 psi) DIN insert, allowing you to switch between yoke (A-clamp) and DIN regulator connections as needed.
Valve Usability Features: Fitted with an easy-grip rubber hand-wheel for straightforward operation, a one-piece safety plug, and a 5/32" hex wrench dip tube for positive retention, keeping the valve assembly secure and reliable.
Nitrox Ready: Suitable for use with Nitrox mixtures up to 40% O2, giving recreational divers the option to run enriched air without needing a dedicated nitrox-specific cylinder.
Regulatory Compliance: Manufactured to meet US DOT-3AL and Transport Canada TC-3ALM specifications, ensuring the cylinder has been independently certified to recognised pressure vessel safety standards.
Dimensions and Weight: 184 mm diameter, 663 mm length, and 14.5 kg empty weight. A compact and manageable profile that suits most dive travel and boat diving scenarios.
Cylinder Thread: 0.750-14 NPSM thread, the standard sizing compatible with the vast majority of recreational dive valves and regulator first stages.
Included Accessories: Comes with a tank boot for upright storage and a valve cap to protect the valve opening during transport and storage.

The Thunderbird 80cuft aluminium tank is a dependable, well-specified cylinder that ticks all the boxes for recreational divers looking for a quality entry into tank ownership. Whether you're diving locally or heading on a live-aboard, having your own cylinder means you're not at the mercy of hire gear, and this one is built to last.

Brand: Thunderbird
Product: 80cuft Aluminum Scuba Diving Tank - Cylinder/Valve
Our Price: $599.99
SKU: TBCAL80B-PACK

Water Volume Liters: 11.1
Color: Silver
Gas Capacity Cubic Feet: 77.5
Service Pressure Psi: 3000
Service Pressure Bar: 207
Empty Weight Kg: 14.5
Empty Weight Lbs: 31.9
Diameter Mm: 184
Diameter Inches: 7.25
Length Mm: 663
Length Inches: 26.1
Buoyancy Full Kg: -0.7
Buoyancy Full Lbs: -1.5
Buoyancy At 500 Psi Kg: 1.5
Buoyancy At 500 Psi Lbs: 3.3
Material: Aluminum 6061-T6 alloy
Cylinder Thread Size: 0.750-14 NPSM
Valve Type: Convertible K-Valve
Valve Brand: Thermo by Thunderbird
Valve Material: Chrome Plated Brass, Rubber

What is the actual gas capacity of this tank, and what does the "80cuft" name mean?

The tank holds 77.5 cubic feet of gas at its service pressure of 3,000 psi (207 bar), with an internal water volume of 11.1 litres. The "80cuft" designation is a common industry name for this size class. It's one of the most popular sizes for recreational scuba diving, offering a solid balance between gas supply and manageable size.

Can this tank be used with Nitrox, and does it need any modification?

Yes, this tank is Nitrox Ready straight out of the box for mixes up to 40% oxygen — no additional cleaning or modification required. The included Thermo by Thunderbird K-Valve supports this, making it a practical choice for divers who want the flexibility to dive with enriched air without purchasing a separate dedicated cylinder.

Does this tank use a DIN or yoke (A-clamp) regulator connection?

The included convertible K-Valve supports both connection types. It comes fitted as a standard yoke (A-clamp) valve but includes a removable 230 bar (3,336 psi) DIN insert, so you can switch between connection styles to suit your regulator — a useful feature if you dive with different equipment or travel internationally.

Will this tank become positively buoyant during a dive, and how does that affect weighting?

Yes — like all aluminium tanks, buoyancy shifts as gas is consumed. This tank is slightly negative when full at -0.7 kg, but becomes positively buoyant at +1.5 kg when nearing empty (around 500 psi). Divers should account for this shift when calculating their weighting, typically by adding extra weight to compensate for the end-of-dive buoyancy change.

We care about your satisfaction. That's why returns to Adreno are fast & easy! If you are dissatisfied with your purchase for any reason, you may return it to Adreno within 30 days of the purchase date, subject to the conditions and exclusions below:

Eligibility Conditions

Please read conditions below. If all conditions are not met, Adreno reserves the right to refuse the return or to charge a minimum 15% restocking fee.

All returned items must be in new condition, in their original unaltered box (including an intact PLU code) and must include all packing material, blank warranty cards, manuals and accessories. We can only refund or exchangeproducts provided theyhaven't been used in the water and are undamaged.
Adreno is not responsible for mis-handling of products or ill-treatment of goods.
Adreno is not responsible for personal data or items left in returned merchandise.
Adreno is not responsible for any consequential or incidental damage resulting from the use of any merchandise bought from us including lost or stolen equipment.
Claims for missing items or items damaged in transit must be received within 7 business days of receipt of merchandise.
If returning a wetsuit for warranty assessment, please ensure the wetsuit is thoroughly dry inside and out, otherwise there will be a delay in processing your return for hygiene reasons.

Final Sale & Non-returnable Items

Purchases via our Tightass Tuesday promotion cannot be exchanged or refunded.
Clearance product from our monthly “Timed Sales” are eligible for return or refund. Exchange as long as stock is available of same item.
Special order products or any other items indicated on our website as "Discontinued" or "Special Order" are non-refundable. These may incur a re-stocking surcharge and be returned as a voucher or store credit.

Defective items may be repaired, exchanged or refunded at our discretion for the same model or manufacturer's equivalent model.

Returns & Exchanges

Securely pack all items that you would like to be returned and post mark via registered mail with tracking info as we are not liable for shipments which may go missing during transit. Please include the following with your package:

Return must be accompanied with completed Return Authorisation form (below) and a copy of original receipt or invoice.
Detailed note as to the reasons of the return
Instructions as to whether you would like a refund or an exchange
All items must be returned in original/unused condition.
Customers are responsible for return shipping costs; however, if an exchange is requested, we will cover the cost of sending the replacement item.

Please allow 7-14 business days for mail-in exchanges to be processed.

Return Authorisation Form - required.

Refunds & Credits

Once we receive and inspect your item(s), we will credit your account. Please allow up to 30 days for a credit to appear on your account from received date. In most cases, we will issue your refund in the same way you made the original purchase.

Purchases made via gift voucher will be refunded as a new gift voucher, they cannot be refunded as cash.

For Returns, Refunds or Exchanges please email sales@adreno.com.au or call us on (07) 3895 8408.

Shipping Terms

Standard - $14.99: Orders shipped to metropolitan areas are typically delivered within 2 - 4 days of the dispatch date, allow an additional 1 - 2 days for picking and packing of your order. Tracking details will be provided so that you can track the progress of your order.

Bulky Surcharge - $15: Many of the items we sell are large, and or heavy and require special handling and shipping services. The list of bulky product types is as follows, but is not strictly limited to: Scuba Cylinders, Spearguns, Long Blade Fins and Blades, Cray Loops, Crooks, Handspears, BCDs.

Jump The Queue Surcharge - $5: Orders placed before 2 pm AEST are packed and dispatched on the same day, while orders placed after 2 pm AEST are packed and dispatched the following business day. You'll receive tracking details so you can follow the progress of your order.

PO Box Surcharge - $10: Shipping to PO boxes incurs an additional charge from our couriers. Any item over 1m in length can not be shipped to PO Boxes.

Remote Area Surcharge - $20: Shipping to certain remote areas incurs an additional surcharge - these remote areas are defined by Australia Post. Use our easy postcode search to check if your postcode is remote - Postcode Search.

Shipping Insurance - $4.99: Protect your order with Australia-wide shipping insurance.

Please contact our customer serviceteamif you have any questions about shipping times for your area.

*Note: Prices are based on shipping to mainland Australia. Offshore islands and territories may incur additional delivery charges, in which case our customer service team will contact you. Large or bulky orders may be shipped by road and may take additional time to deliver.

If you have any questions or would like to discuss your order further please feel free to call our friendly customer service representatives on (07) 3895 8119 or email us at sales@adreno.com.au.