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Due to a variety of beer styles and storage options for your keg, thereâs no set answer to this question. Depending on who you ask or what site you read, the answer will range between 20-120 days.
In European countries, the capacity of the common keg size is 13.21 gallons. It stands 20.94 inches high, the diameter of which is 16.06 inches. Aside from this, the next keg size has a capacity of 7.93 gallons. It has the same diameter as the 13.21-gallon keg, but it has a slightly lower height of 14.37 inches.