How to Fix a Foaming Beer Tap

Written by r.l. cultrona
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Almost everyone has seen a beer commercial where beer is poured from a tap and it has the perfect amount of foam sitting on top of the glass. While it would be nice if every pour from a tap looked like this, the reality is that there are many things that can go wrong with a keg of beer that will cause only foam to come out of the tap instead of beer. When this happens, there are several steps you can take in order to ensure a nice pour.

Skill level:

Things you need

  • 5-gallon bucket
  • Large tub with ice or a refrigerator
  • Wrench

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  1. 1

    Open the tap and pour the foam into a five-gallon bucket. Sometimes the foam just needs to be cleared out of the lines and keg before the beer can begin to flow correctly. Keep the tap open for a few minutes and dump the foam down a drain.

  2. 2

    Place the keg in a tub of ice or a refrigerator. Warm beer can't process carbon dioxide (CO2), which causes the foam. Cooling it down may make the foam disappear.

  3. 3

    Adjust the regulator on the top of the carbon dioxide CO2 tank attached to the keg. A keg needs CO2 to help push the product through the lines and out of the tap. If there is too much carbon dioxide going into the beer, it may continually cause foam. It should be between 10 and 15 PSI.

  4. 4

    Adjust knobs on the lines from the CO2 tank to the keg and from the keg to the tap to let more or less air and beer into and out of the lines. The small bolts help control the flow of product.

Tips and warnings

  • Sometimes there is no rhyme or reason a keg decides to foam. if you have tried everything, you may need to swap it out for another keg. Always keep a backup handy.
  • If there is a build up of CO2 in the lines, the foam may come exploding out of the tap. If you are not careful, this can soak you in beer foam and may ruin your clothes.

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