A keg lasts 4-7 days once tapped.
The lifespan of a tapped keg depends on its size and consumption rate. A half-barrel keg (15.5 gallons) typically lasts 4-7 days with moderate use. Proper refrigeration significantly extends freshness. Warmer temperatures and exposure to air accelerate oxidation, impacting taste and quality.
Factors Affecting Keg Life
- Temperature: Colder temperatures slow down oxidation.
- Keg Size: Larger kegs maintain carbonation longer.
- Consumption Rate: Faster consumption means quicker depletion.
- Proper Tapping: A secure tap prevents air exposure.
Keg Size and Estimated Lifespan
Here's a general guide to how long different keg sizes last:
| Keg Size | Approximate Beer Volume | Estimated Lifespan (Tapped) |
|---|---|---|
| 1/6 Barrel (5.16 gallons) | ~40 pints | 1-2 days |
| 1/4 Barrel (7.75 gallons) | ~62 pints | 2-4 days |
| 1/2 Barrel (15.5 gallons) | ~124 pints | 4-7 days |
| Full Barrel (30 gallons) | ~248 pints | 7-14 days |
Maintaining Keg Freshness
- Refrigerate: Keep the keg as cold as possible.
- Use a Proper Tap: Ensure a tight seal to minimize air contact.
- Purge with CO2: After each pour, briefly purge the keg with carbon dioxide.
- Consume Promptly: Drink the beer within the recommended timeframe.
Once a keg is empty, it should be properly cleaned and sanitized to prevent bacterial growth if it is to be refilled.