1000L pressurized insulated and jacketed horizontal maturation tank for sale Beer maturation tank, also know as brite tank, bright beer tank, is used to age beer during the secondary fermentation process. The horizontal maturation tank is one type of maturation container and the other type is vertical. Our maturation tans are stackable which means you can save much space by increase the height and reducing the width. Every single tank equips more than necessary parts ensuring you have the best using experience.