The 8 Best Portable Air Tanks
Updated by · How we research
Eight steel and aluminum air tanks compared by capacity, pressure rating, weight and fittings. The Performance Tool W10005 leads for simple tire top-ups. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki.
Steel air tanks usually fail from the inside, where leftover moisture turns to rust, so draining one after each use matters. A portable air tank is a sealed steel or aluminum vessel you fill from a compressor or a shop air line, then carry to a low tire, a boat trailer or a job with no power. Drivers, racers and DIYers keep one handy.
Editor's Notes
October 18, 2026, by Ezvid Wiki Admin:
This list needed more than a reshuffle. The Craftsman Horizontal and the Larin AT-11 are gone from sale, and we couldn't confirm a current listing for the Metabo HPT UA3810AB. We dropped the SKS RideAir because it's a bicycle gadget rather than a shop tank, the Jegs 81001 because it's nearly the same tank as the California Air Tools CAT-AUX05A, and the Allstar Performance and Pro-Lift W-1005 because better-known tanks do the same job for less.
The Performance Tool W10005 stays and takes first place. It's plain and cheap, and owners have relied on it for years. The California Air Tools CAT-AUX10A and the Pro-Force FT5 stay too. New picks add more capacity, an upright aluminum tank and a 225 PSI tool tank.
One correction: the old buyer's guide said these tanks store compressed oxygen. They don't. They hold ordinary compressed air, and putting oxygen in one is a fire risk. We found no lab tests of portable air tanks, so each maker's capacity and pressure ratings, OSHA's rules for air receivers, owner reports and recall records guided the ranking.
October 21, 2020:
Since these air tanks are designed to be portable, the majority of the ones we selected have a 5-gallon capacity, with the exception of the Larin AT-11, which holds 11-gallons, making it a bit more cumbersome, but allows for a greater range of uses. The Allstar Performance and the California Air Tools AUX10 come in several sizes with the latter being available in a steel or a lightweight aluminum version. They are primarily designed to be filled with an air compressor then carried to wherever the air is needed. Generally speaking, a 5-gallon tank will not hold enough air to fully inflate a flat car tire, however, they are useful for topping up the pressure, inflating bicycle tires or pool toys, or for using pneumatic tools for a short period of time.
In our latest edit, we included the new Metabo HPT UA3810AB due to its versatile design, which allows it to be used as a portable tank, or thanks to its five outlets, as a booster vessel for maintaining pressure over long distances. The Allstar Performance and the Jegs 81001 are both made from aluminum, making them up to 50 percent lighter than their steel counterparts, and therefore a good choice for lifting in and out of vehicles. Those looking for a truly portable option for small tasks such as inflating a football or a bicycle tire, may want to consider the SKS RideAir. It is small enough to fit in a bottle cage and features an unobtrusive pressure gauge.
May 10, 2019:
It has currently become difficult to find the Hyundai HHT5GAT, so we decided to remove it, but there remain plenty of worthy options. These still include the California Air Tools AUX10 and the Larin AT-11. The California Air Tools model is particularly useful, as it comes in either steel or aluminum and in 5- or 10-gallon sizes. This flexibility ensures you can choose exactly the right model for your particular shop or home. We also added the Longacre Lightweight on the strength of its inlet valve that's designed for speed. It'll probably only realistically save you a few minutes with each fill, but if you're working in an environment where speed is critical, it adds up. Finally, after some debate, we have elected to keep the Pro-Lift W-1005. Its main issue stems from the included hose and chuck, but it's also one of - if not the - lowest priced options. Plus, it is a horizontal/vertical model. These benefits may, for some, outweigh any issues caused by the hose or fittings.
Special Honors
Milton Industries Milton Industries, based in Chicago, has sold pneumatic accessories since 1943. Its range covers tire chucks, inflator gauges, couplers and plugs, hoses and blow guns, so it's a good place to look when the chuck or gauge on a portable tank wears out. Some of its products are assembled in the U.S. from U.S. and imported parts. Check the thread size on your tank's hose before ordering. miltonindustries.com
How Much Air A Tank Really Holds
Compressed air is counted as free air, the space it would fill at normal atmospheric pressure of about 14.7 PSI.
A tank's gallon rating is its inside volume, not the amount of air you get out. Compressed air is counted as free air, the space it would fill at normal atmospheric pressure of about 14.7 PSI. By our arithmetic using Boyle's law, a 5-gallon tank holds about two-thirds of a cubic foot, and at 125 PSI that's roughly 6 cubic feet of free air. You can only use the part above the pressure you're filling to, so the tank stops helping a 35 PSI car tire once it drops to 35 PSI itself.
In practice, a full 5-gallon tank can add about 10 PSI to four or five car tires, or bring one flat tire up to pressure, before it's spent. A 10- or 11-gallon tank roughly doubles that. Air tools use stored air much faster. The Engineering ToolBox explains that shops use air receivers as a buffer for a compressor, not a replacement, and a portable tank works the same way: it covers a short burst, not a long job.
Weight follows material. The California Air Tools aluminum tanks weigh 10 pounds at 5 gallons and 13 pounds at 10 gallons. Painted steel tanks run about 14 to 16 pounds at 5 gallons and about 24 pounds at 11 gallons.
Tank, Inflator Or Compressor
A portable air tank makes no air. You fill it from a compressor or a shop or gas-station air line, then carry that stored air to where you need it. That works well when there's no power nearby, when you want more than 100 PSI right away, or when you need to blow dust out of a radiator or an air filter. If you mostly top up tires at home, a 12-volt or cordless inflator is often simpler, since it never runs empty, though it's slower and louder.
Look closely at the fittings. Some tanks fill through a valve that takes a standard tire chuck, while the California Air Tools tanks use a quarter-inch quick connector. A shut-off valve at the inlet, like the one on the Torin 7-gallon tank, lets you disconnect the fill hose without bleeding the tank. Tool tanks with several quick couplers and a regulator act as an extra reservoir for a compressor, so the motor cycles less often.
Chucks and gauges wear out first. Replacements from fitting makers such as Milton Industries thread onto the quarter-inch NPT ends used on many tank hoses. A gas-station hose works for filling, but it may stop short of a tank's full rating.
Safe Filling, Draining And Storage
A portable tank is a pressure vessel, so treat its rating as a hard limit. Most tanks in this class are rated for 125 PSI, and tool tanks can go higher. Fill them only with air. These aren't oxygen, breathing-air or scuba tanks, and oxygen near oil or grease can start a fire.
OSHA's rule for air receivers at work, 29 CFR 1910.169, is a sound guide at home too. It calls for a drain at the lowest point so water can be removed often, and a safety valve sized so pressure can't climb more than 10 percent above the rated maximum, with no shut-off valve between the tank and the safety valve. It also says safety valves should be tested regularly, so pull the ring on yours now and then.
Water from compressed air collects inside a tank, and internal rust is how steel tanks fail. The U.S. Consumer Product Safety Commission warned about portable air tank explosions in 1978, and in 2002 it announced a compressor recall because internal corrosion could rupture the tank (CPSC SaferProducts). Drain the tank after each use, store it empty in a dry place, and retire it if it's badly dented, rusted or leaking at a seam. Never weld, drill or patch the shell. We found no ASME pressure-vessel stamp claimed for the consumer tanks on this list.
How we researched this
We compared 22 portable air tanks and reservoirs, read the makers' listings, spec charts and maker pages for the 8 finalists, analyzed owner feedback patterns, checked every brand for recalls with the U.S. Consumer Product Safety Commission, and read OSHA's rules for air receivers. We found no independent lab tests of portable air tanks. The air-volume figures are our own estimates from Boyle's law.
Frequently asked questions
Is a portable air tank the same as an air compressor?
No. A tank only stores air. You fill it from a compressor or an air line, and it runs down as you use it.
How many tires can a 5-gallon air tank fill?
By our estimate, a full 5-gallon tank at 125 PSI can add about 10 PSI to four or five car tires, or fill one flat tire. Bigger tires mean fewer.
Where can I fill a portable air tank?
From any air compressor that reaches the tank's rating, or from a shop or gas-station air line. Stop at the maximum pressure printed on the tank, usually 125 PSI.
Can I put oxygen or another gas in an air tank?
No. Use compressed air only. Oxygen near oil or grease is a fire hazard, and these tanks aren't made for breathing air or scuba use.
Is an aluminum or steel air tank better?
Aluminum weighs less and won't rust inside, but it costs more. Steel is cheaper but has to be drained after use to keep rust from forming.
How do I keep an air tank safe?
Drain it after use, test the relief valve now and then, never fill it past its rating, store it dry, and never weld or drill it. Retire a tank with rust, dents or leaks.
