How to Hook Up a Beer Keg: A Comprehensive Guide
Hosting a party or just want to ensure a steady supply of cold beer at home? Hooking up a beer keg is a great way to serve your favorite brew on tap. This comprehensive guide will walk you through the process, from choosing the right equipment to pouring the perfect pint.
Gather Your Equipment
Before you start, make sure you have all the necessary equipment:
- Empty beer keg
- CO2 tank (empty is fine)
- CO2 regulator
- CO2 gas line
- Draft beer tower or picnic tap
- Beer line (usually 5/16" ID food-grade plastic tubing)
- Clamps and fittings
- Ice (for cooling)
Choose the Right Keg
Beer kegs come in various sizes, from 5 to 165 liters. The most common sizes for home use are 5, 15.5, and 30 liters. Consider how many people you'll be serving and how long you want the keg to last when choosing the right size.

Prepare the Keg
Once you have your keg, make sure it's clean and sanitized. If it's a new keg, you'll need to purge it with CO2 to remove any oxygen. Here's how:
- Attach the CO2 regulator to the CO2 tank.
- Connect the CO2 gas line to the regulator and the keg's gas-in fitting.
- Turn the regulator's pressure gauge to 10-15 PSI and open the gas valve on the keg.
- Purge the keg by opening the gas valve on the regulator and allowing the CO2 to escape through the pressure relief valve on the keg.
- Close the gas valve on the keg once the pressure reaches 0 PSI.
Fill the Keg
Now that your keg is purged, it's time to fill it with beer. If you're using a full keg, you can skip this step. Otherwise, you'll need to transfer the beer from its container into the keg:
- Place the keg in a large tub or sink filled with ice to keep the beer cold.
- Open the beer container and pour it into the keg through the beer-out fitting.
- Once the keg is full, purge it again with CO2 to remove any remaining oxygen.
Set Up the Draft Tower
Now that your keg is filled and purged, it's time to set up the draft tower. If you're using a picnic tap, you can skip this step:

- Connect the beer line to the beer-out fitting on the keg.
- Run the beer line up to the draft tower and connect it to the beer-in fitting.
- Connect the CO2 gas line to the CO2-in fitting on the draft tower.
Serve Your Beer
You're now ready to pour the perfect pint. Here's how to serve your beer on tap:
- Set the regulator's pressure gauge to 5-10 PSI.
- Open the gas valve on the keg or draft tower.
- Pull the tap handle to dispense the beer. Pour at a 45-degree angle to create a proper head.
- Close the tap handle once the glass is full.
Clean and Maintain Your Keg
After use, it's important to clean and sanitize your keg to prevent bacterial growth. Here's how:
- Drain any remaining beer from the keg.
- Purge the keg with CO2 to remove any remaining oxygen.
- Clean the keg with a food-grade cleaner and sanitizer.
- Rinse the keg thoroughly with water.
- Allow the keg to air dry before storing it.























