Yes! It is possible to add a tank to a tankless air compressor to increase the consistency of air flow and prevent losing pressure. This can be great if you only occasionally want to use your tankless air compressor with air-hungry tools like air ratchets and air drills but want the convenience of a tankless air compressor the rest of the time. A spare tank can also be added to an air compressor with an existing tank to expand its capacity. Note, however, that whenever you add a tank to an air compressor you will increase the amount of time that the compressor needs to run to fill the tank and reach your desired pressure, which can increase the chances of burning out your compressor’s motor.