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Air bag jack buying guide

Updated: 21.10.2026

You already own a compressor, or you are about to buy one, and the search has mixed a scissor jack, a 12 V electric jack and a rubber bag that needs shop air. This air bag jack buying guide is the check before prices. On 19 October 2026 the five amazon.co.uk listings in our [compressed air jack comparison](/hub/compressors/compressed-air-jack) were four 3 ton triple bags from £79.99 to £99.99 and one 20 ton air bottle at £93.97. A qualifying purchase can earn a commission at no extra cost to you. The decision is whether the corner, the gap under the car and the pressure printed on that listing actually match.

You already own a compressor, or you are about to buy one, and the search has mixed a scissor jack, a 12 V electric jack and a rubber bag that needs shop air. This air bag jack buying guide is the check before prices.

Our top picks

KATSU KATSU 3 ton air bag jack 161200

Best overall

KATSU KATSU 3 ton air bag jack 161200
7.7/10about £89.99
View offer
AIM Tools AIM Tools 3 ton air bag jack 161207

Best value

AIM Tools AIM Tools 3 ton air bag jack 161207
7.4/10about £79.99
View offer
US PRO US PRO 3 ton air bag jack 8820

Alternative

US PRO US PRO 3 ton air bag jack 8820
4.9/10about £99.99
View offer
On this page
  1. 1.What counts as a compressed air jack
  2. 2.Capacity and height
  3. 3.Air, inlet, and the safety valve
  4. 4.What the listing will not prove

What counts as a compressed air jack

A compressed air jack in this set lifts one corner with air from a compressor, not with a hand pump and not from the car battery. A scissor, a 12 V jack or an impact wrench is a different product. The five that pass are AIM Tools 161207, AIM Tools 161202, KATSU 161200, US PRO 8820 and US PRO 8819. The first four state 3 tons. The fifth states 20 tons and a manual override.

Capacity and height

Match the stated capacity to the corner you lift, not to the whole kerb weight. HSE says not to exceed the rated capacity. A 3 ton figure is the seller’s rating for the jack, not a promise to pick up a 3 ton vehicle in one go. A 20 ton bottle is a different class. It is not, by the number alone, a safer car jack. The air bag jack vs air bottle jack page holds that split, including the height the bottle leaves blank. These bags start between 140 and 150 mm and stop between 400 and 450 mm. The bottle states no height. Measure the gap at the maker’s jacking point, because a lowered sill can sit below 140 mm.
KATSU KATSU 3 ton air bag jack 161200

Testsieger

KATSU KATSU 3 ton air bag jack 161200
7.7/10about £89.99
View offer

Air, inlet, and the safety valve

Only US PRO 8820 prints a working pressure: 87–116 psi, which is 6–8 bar, plus a 1/4 inch inlet. AIM Tools 161207 and the KATSU state a G1/4 inlet and no bar figure. AIM Tools 161202 states input, outlet and safety valves, and not the inlet size or the pressure. The bottle states neither. An 8 bar or 8–10 bar line on another UK seller’s bag is that model. Copying it onto AIM Tools or KATSU would invent a rating. Tank and adaptor are on the compressor size for a compressed air jack page. Both AIM Tools bags and US PRO 8820 name a safety valve. KATSU and the bottle do not. Do not adjust a safety valve to chase height. None of the listings itemise a UK adaptor.

What the listing will not prove

BS EN 1494:2000+A1:2008 covers mobile or movable jacks, including pneumatic ones. Its catalogue summary says work under the raised load is not permitted unless the load is secured another way. None of these five claim that standard or show a declaration of conformity, so this page does not call them UKCA marked. The Consumer Rights Act 2015 gives you 30 days to reject goods that are not of satisfactory quality.

Common questions

Is a 3 ton bag enough for my car or SUV?
A 3 ton rating is the seller’s figure for the jack, not the kerb weight of the whole vehicle. HSE says not to exceed the rated capacity. These bags name cars and SUVs, and one UK review of AIM Tools 161202 describes a Porsche Cayenne lifted on a small compressor. That is one vehicle, not a test of every SUV. If the corner load is in a heavier class, a 3 ton bag is the wrong tool.
What minimum height will go under the sill?
The bags in this set start at 140 mm, 145 mm or 150 mm. Measure the gap at the maker’s jacking point before you buy, because a lowered car can sit below the lowest of those figures. US PRO 8820 states the 140 mm start and a 450 mm top. The 20 ton bottle states no height at all. A non-UK comment on the KATSU says that jack was too tall for a lowered car.
Does every air jack need 8 bar?
No. Only US PRO 8820 prints a range, and that range is 6–8 bar, also written as 87–116 psi. AIM Tools and KATSU state an inlet on two of the three bags and do not state a pressure. An 8–10 bar line on another brand’s bag is that brand’s figure. Use the number on the jack you are buying, and treat every other bar rating as someone else’s model.
What does the safety valve actually do?
Where a listing states a safety valve, it is there to limit pressure in the bag. Both AIM Tools jacks and US PRO 8820 state one. KATSU and the 20 ton bottle do not. Do not adjust it to gain height. If a hose has already split, stop and support the vehicle another way. The valve is not a substitute for axle stands.
Will Amazon’s star rating tell me which is safest?
The three bags that have a star line all sit at 4.4. KATSU has 72 reviews, AIM Tools 22 and 18. Most of the captured KATSU text is not from the UK. The US PRO listings have no review line, which is missing evidence rather than zero stars. Safety in this comparison is the stand, the jacking point and a pressure the listing actually prints. It is not the star average.
Do I still need axle stands?
Yes. The jack raises the vehicle. It is not the support while any part of you is underneath. HSE says not to work under a vehicle held only by a jack, and BS EN 1494’s catalogue summary says the same thing in the language of the standard: secure the load another way before you work under it. Have rated stands and chocks within reach before you open the air valve.

Related pages

Best air bag jack UK

Compressed air jack

Air bag jack vs air bottle jack for one car corner

What size compressor for an air jack on these listings

How to use an air bag jack before you go underneath

Sources

Public UK sources below. amazon.co.uk listings for these five jacks, shelf date 19 October 2026.

  1. HSE: Working under vehicles (retrieved 19 October 2026)
  2. HSE: HSG261 (retrieved 19 October 2026)
  3. HSE: OC 803/69 (retrieved 19 October 2026)
  4. BSI: BS EN 1494:2000+A1:2008 mobile or movable jacks (retrieved 19 October 2026)
  5. BSI: BS EN 13731:2007 lifting bag systems for fire and rescue (retrieved 19 October 2026)
  6. GOV.UK: Supply of Machinery (Safety) Regulations 2008 (retrieved 19 October 2026)
  7. legislation.gov.uk: Consumer Rights Act 2015 section 22 (retrieved 19 October 2026)
  8. amazon.co.uk listings for the five jacks in this comparison (retrieved 19 October 2026)