Jan 19, 2024 · Beer fermentation tanks cover a wide range of sizes from a few barrels to massive volumes over 1000 barrels. Some typical fermenter capacities include: Pilot Systems: 1-3 BBL. Microbreweries: 3-7 BBL, 7-30 BBL. Pub Breweries: 15-30 BBL. Production Breweries: 30-300 BBL, 600-800 BBL, 1000+ BBL.