Air or pump

Some hydraulic air bottle jacks are powered by an electric air compressor, while others utilize a manual hand pump. Air hydraulic pumps are commonly used in mechanic shops, where there is a constant need for a steady jack. They're easier to use, since the air compressor does most of the hard work.

Pump bottle jacks, on the other hand, don't require any outside equipment. They're most common for home use. Most have a long handle that you manually pump up and down in order to raise the jack.

Finding a level surface

The top of a bottle jack (referred to as the saddle) is relatively small. As such, bottle jacks need to be positioned on a steady surface so they don't tip over when placed under pressure. For lifting a vehicle, a flat concrete surface is optimal for keeping your bottle jack in place.

If you're using your bottle jack for lifting a house, then you'll need to know the state of the dirt underneath the house. You need to be sure that the ground is level and stable, otherwise you could have a dangerous and expensive accident if your jack does not stay in place.

Build material

Bottle jacks lift multiple tons of weight at a time, which means that they need to be made from strong materials. Forged steel is the primary material used in most bottle jacks. Unfortunately, this also makes them quite heavy. You can find lighter iron and aluminum bottle jacks as well, though they usually have lower weight capacities than their steel counterparts.

Horizontal work

Bottle jacks are the go-to tool for those trying to straighten a door jam. Most often, a bottle jack that has a weight capacity of four tons will be sufficient to get such a job done.

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