If you fill in the US, the certification stamped on the tank matters more than the brand name on it. This page answers the questions US airgunners ask most, honestly and without exaggeration. For the brand site, visit acecareus.com, and see also DOT Tanks for US Airgunners.
Will a dive shop fill this tank?
A DOT tank removes the certification reason for a refusal, because US shops recognise DOT. A shop can still refuse under its own policy, and some shops will only fill to 3000 psi rather than 4500 psi. Before you travel, call ahead and ask whether they fill DOT tanks, whether they fill to 4500 psi, and whether they top the tank up after it cools down.
DOT vs CE — is one safer?
This is not a claim that CE is unsafe; the difference is recognition in the US. DOT is the US standard for transport and commercial filling, while CE is the European standard. If you plan to fill at a US shop, buy DOT, and if you will only ever fill at home, CE is an option to consider. When you compare prices, compare DOT against DOT only, so the comparison is like for like.
How long does a DOT tank last, and when is hydro due?
A DOT tank has a 15-year service life, with a hydrostatic test every 5 years and a visual inspection every year. A hydro test at year 14 does not extend the tank beyond its 15-year life. The DOT tanks listed here are 2026 production, not second-hand ex-fire-service bottles.
Can I fill at home AND at a shop?
Yes, as long as the tank is a DOT tank and still within its hydro period, you can fill at home and at a shop. A shop will check the markings stamped on the tank and its hydro status before filling. Keep the inside of the tank dry, and do not leave an empty tank standing open.
Why is DOT more expensive?
The higher price reflects certification costs, holding stock in the US, and providing after-sales support in the US. A figure often quoted in forums is that a DOT tank costs 150–200% more than a comparable CE tank. That is exactly why price comparisons should be DOT against DOT only.
6.8L or 9L?
The 6.8L is lighter and easier to take out with you, while the 9L holds more air and means fewer trips to a fill station, but it is heavier to carry. A small single-cylinder home compressor is best matched to a 1–2L tank. For a 6.8L or 9L tank, a mid-range dual-cylinder compressor means a longer, staged fill, or you can simply fill at a shop.
What do I need besides the tank?
Check the product page “What’s Included” section first: the Tank Only listings state 1 × cylinder, with the valve fitted as shown in the product images. No fill hose is listed as included, so you will also need a fill hose or adapter that matches your own airgun. Do not assume a hose or adapter is in the box unless the product page says so.