Signs You Should Replace Your Brewery Unitanks Your fermenters and unitanks provide you with the means to create your beer at a consistent level of quality. Unfortunately, nothing lasts forever. Eventually, you’ll need to replace your unitanks with newer versions. While these pieces of equipment can last a long time, you shouldn’t hold onto them for too long once you notice something off. Be aware of these signs that you should replace your brewery unitanks if you want to avoid future issues.