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Our DOT certified tanks are carbon fiber high-pressure cylinders approved to US Department of Transportation standards, so you can fill, transport, and use them legally anywhere in the United States. Stocked in our US warehouse for fast domestic shipping, this collection covers the most popular 4500 psi carbon fiber tank sizes, including the 6.8L (415 cu in) 68/4500 HPA tank and the 9L (550 cu in) cylinder, with working pressures up to 300 bar. Every DOT certified pcp air tank ships with a high-pressure valve and fill station, ready to refill your PCP air rifle, paintball marker, or airsoft setup the same day it arrives. Divers and rescue teams also rely on these lightweight cylinders as a 300 bar scuba tank alternative. If you need a proven, US-legal HPA tank backed by real safety certification, start here.
How to Choose Your DOT Carbon Fiber Tank
6.8L vs 9L — which size?
6.8L (415 cu in): lighter and easier to carry; a great all-round choice for a day at the range. Fewer fills per tank than 9L.
9L (550 cu in): about 30% more air per fill; better if you shoot high shot counts or share the tank with friends. Heavier to carry.
DOT vs CE — what’s the difference?
DOT tanks are certified for the U.S. market — U.S. dive shops and fill stations accept them for refills.
CE tanks follow the European standard. If you fill in the U.S., choose DOT.
This category lists DOT-certified tanks only.
Valve & filling
All tanks in this category use an M18×1.5 thread valve; each listing states which valve is included.
Fill via a fill station from a larger supply, a high-pressure compressor, or a dive/paintball shop.
What to check before you buy
Size: 6.8L or 9L water volume.
Valve: gauge / fill-station configuration included.
Manufacture date: all DOT tanks we currently stock were manufactured in 2026 (15-year service life, 5-year hydro retest cycle).
FAQ
Can U.S. shops fill these tanks? Yes — DOT certification is the U.S. standard for refillable cylinders.
How long does a tank last? 15-year service life from the manufacture date, with a hydrostatic retest every 5 years.
Do I need a special compressor? Any fill source that reaches 4500 PSI works: a 4500 PSI compressor, a fill station, or a dive shop.
Which bag fits my tank? Our AirPack padded bag fits 6.8L–12L cylinders.
Where do orders ship from? Our U.S. warehouses in Chico and Ontario, California.
Showing 1–12 of 13 results
Combo Deal — Save $28 Get the complete setup in one order: the ACECARE 6.8L carbon fiber cylinder paired with the AirPack made to carry it. Buying the combo saves you $28 compared with purchasing each item separately. This combo includes: ACECARE 6.8L DOT 300 Bar (4500 PSI) Carbon Fiber Tank — Tank Only —…
Combo Deal — Save $28 Get the complete setup in one order: the ACECARE 9L carbon fiber cylinder paired with the AirPack made to carry it. Buying the combo saves you $28 compared with purchasing each item separately. This combo includes: Acecare 4500 PSI DOT Certified 9L Carbon Fiber Tank (97CF) – Tank Only —…
Upgrade your dive or scuba diving setup with the Acecare 6.8L 4500 PSI Carbon Fiber Tank.
Engineered from aerospace-grade carbon fiber with an aluminum liner, this DOT-certified cylinder delivers maximum pressure capacity at a fraction of the weight of steel tanks.
Perfect for scuba divers and professionals who demand reliable performance.
🎒 Pair it with the AirPack bag combo — tank plus padded carry bag, one order.
✅ Tank Only · 15-year service life · 5-year retest cycle · Ships from Chico, California in 1–2 business days.
Upgrade your dive or scuba diving setup with the Acecare 6.8L 4500 PSI Carbon Fiber Tank.
Engineered from aerospace-grade carbon fiber with an aluminum liner, this DOT-certified cylinder delivers maximum pressure capacity at a fraction of the weight of steel tanks.
Perfect for scuba divers and professionals who demand reliable performance.
Upgrade your air system with our DOT certified 415CI (6.8L / 65CF) carbon fiber scuba tank. Built for divers and professionals, it delivers maximum pressure with lightweight durability.
✅ High Pressure & Capacity — 4500 PSI (310 Bar) gives you more air per fill.
✅ DOT Certified — trusted for safety and regulatory compliance in U.S. markets.
✅ Dual Gauge Filling Valve — monitor both tank and fill pressures clearly.
✅ Lightweight Construction — carbon fiber wrap + aluminum liner keeps weight manageable.
✅ Proven Dimensions & Size — dimensions + empty weight listed so you know what you’re carrying.
✅ Ready to Ship & Use — in U.S. stock, free shipping options, secure checkout.
Upgrade your dive or scuba diving setup with the Acecare 6.8L 4500 PSI Carbon Fiber Tank.
Engineered from aerospace-grade carbon fiber with an aluminum liner, this DOT-certified cylinder delivers maximum pressure capacity at a fraction of the weight of steel tanks.
Perfect for scuba divers and professionals who demand reliable performance.
Can be used as: Scuba Diving Cylinder, SCBA (Self Contained Breathing Apparatus), EEBD (Emergency Escape Breathing Device), Breathing Oxygen Cylinder.
For example, a 9-liter gas cylinder can fill a 280cc gas cylinder in 5 to 15 seconds, completing 6 to 7 fillings.
Our cylinders are used in firefighting, technical diving, and emergency air supply. They support mixed gases like He2 + N2 + O2, making them suitable for land and marine applications.
We’re proud to support fuel cells (H2), aerospace, and university laboratories—helping to drive the future of science and energy.
Our cylinders are used in firefighting, technical diving, and emergency air supply. They support mixed gases like He2 + N2 + O2, making them suitable for land and marine applications.
We’re proud to support fuel cells (H2), aerospace, and university laboratories—helping to drive the future of science and energy.
🎒 Pair it with the AirPack tank bag — padded backpack carrier for 9L cylinders.
💰 Bundle & save: 9L Cylinder + AirPack Combo — tank + padded backpack bag in one package.
✅ Tank Only · DOT Certified · Ships from Chico, California in 1–2 business days.
🚚 Shipping: US shipping rates are calculated at checkout — orders $65+ may qualify for free shipping (see Shipping Policy).
Water Capacity: 9L/550CU.IN.
Air Capacity: 2430L/85.8CU.FT.
Empty Weight : 4.9kg/10.8 lb
Diameter: 174mm/6.85 in
Length: 570mm/22.44 in
Working Pressure: 4500 PSI
Thread: M18*1.5
Can be used as:
More about carbon fiber cylinder: As SCBA and life support cylinders feature aluminum alloy liner with thin wall and full-wrapped composite material exterior with carbon fiber and glass fiber which are suitable for SCBA, oxygen respirator, medical aid and emergency, as well as for use in automobile, space industry, etc. 4500 PSI fill pressure. Full 15-Year life. Tank life starts at manufacture date.
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