How to Convert a Keg Into a Brewing Kettle - Keggles are kegs that have been converted into brewing kettles. A standard American keg can hold 15.5 US gallons, or 58.66 liters, and can be used to brew between 10-12 gallons of wort. The advantages of using a keg for brewing pretty much come down to quality and cost:
A yeast starter is one of the easiest and most dramatic ways to improve the quality of your homebrew. A single pack of yeast does not contain the optimal number of cells to ferment many types of beer - especially high-gravity beers and lagers.