This non-jacketed 3 barrel brite tank (106 gallons) is rated to 15 psi (1 Bar) and can be used for carbonation of beer, as a tax determination tank, or as a serving tank.  Ideal for kombucha brewing, nano breweries and micro breweries, these brite tanks can also be used for storing and serving carbonated beer, thus eliminating the hassle of cleaning beer kegs.

New they are 3,000+ each. Bought from Stout Tank and Kettles

https://conical-fermenter.com/3-BBL-Brite-Beer-Tank-with-Wheels.html?cat=305

Willing to arrange shipping as well