As an expert sommelier and brewer, I can provide you with some insights on how long a tapped keg can last in a kegerator. The longevity of a tapped keg largely depends on several factors such as the type of beer, whether it is pasteurized or non-pasteurized, and the method of dispensing.
For non-pasteurized draft beer, it is generally recommended that the keg be consumed within 45-60 days of tapping. Non-pasteurized beers are typically more delicate and prone to spoilage compared to their pasteurized counterparts. These beers often contain live yeast and other microorganisms that can affect the flavor and stability over time. Therefore, it is important to consume them relatively quickly to ensure optimal freshness and taste.
On the other hand, pasteurized draft beer tends to have a longer shelf life. These beers have undergone a heating process that kills off any potential spoilage organisms, allowing them to last longer. When stored and dispensed properly in a kegerator, pasteurized draft beer can typically remain fresh for about 90-120 days. However, it is still advisable to consume it sooner rather than later to enjoy the beer at its peak condition.
Maintaining the proper temperature and pressure is crucial for keeping keg beer fresh. It is recommended to store the kegerator at a temperature between 36-40°F (2-4°C) to inhibit the growth of bacteria and maintain the desired flavor profile. Additionally, ensuring that the keg is pressurized correctly is important to prevent oxidation and maintain carbonation levels. The specific pressure setting may vary depending on the type of beer, and it is best to consult the brewery's recommendations or experiment to find the optimal pressure for your kegerator setup.
It is important to note that these guidelines assume the use of CO2 for dispensing the keg beer. CO2 acts as a preservative and helps maintain the freshness and carbonation of the beer. However, if you are using a party pump (air) for dispensing, the lifespan of the keg beer will be significantly reduced. In such cases, the beer will typically remain fresh for only 8-12 hours. This is because the introduction of air can lead to rapid oxidation and spoilage of the beer.
The longevity of a tapped keg in a kegerator depends on various factors such as the type of beer, pasteurization, temperature, and pressure. While non-pasteurized draft beer should ideally be consumed within 45-60 days, pasteurized draft beer can last for 90-120 days when stored and dispensed properly. It is important to always maintain the correct temperature and pressure to ensure the freshness and quality of the beer. So, cheers to enjoying your keg beer at its best!