To get foam out of a beer keg, make sure the keg's temperature is optimal, check the CO2 pressure and clean out the beer lines. Overly foamy beer can also sometimes occur as a result of simply pouring the beer incorrectly.
- Make sure the keg is cold enough
Keep your keg very cold to prevent problems with foam. If your keg is stored inside a refrigerator or kegerator, don't use the fridge for any other items, as opening and closing it raises the temperature of the keg, resulting in excess foam. The keg must remain under 40 degrees Fahrenheit.
- Check the CO2 pressure
Make sure your regulator is set between 10 and 15 psi. Pressure is most likely the problem if foam blows out of the tap when you open it. Turn the pressure down to create less foam.
- Clean out your beer lines
Make sure your beer lines have no twists or kinks in them. Make sure your beer line is at least 5 to 6 feet long so that it creates enough pressure for the beer to have proper foam. Try flushing the lines with a mixture of baking soda and water.
- Perfect your beer-pouring technique
Don't hold your glass right next to the tap when pouring beer; doing so results in too much foam in the glass. Open the tap in a quick steady motion, but try to open it halfway for the best results. Hold the glass at a 45 degree angle below the tap.