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  • 1.  Draft Excessive Foaming

    Posted 10-09-2025 10:53

    We use the Talos Two Tap countertop draft system for our clients. Direct draw from kegs into the chiller in the unit and then pour from a cobra tap with restrictor valves. We are experiencing excessive foaming at one account. The set up is similar to other accounts: kegs kept warm and 1 bar pressure on the regulator. We are at 1,500m altitude (5,000 ft). The account does not have a cooler or other way to keep the kegs cold, so that isn't an option. The account is using chilled glassware (I know), which is not helping to reduce the excessive foaming, but I can see breakout in the beer line. 

    I am not a draft technician and we do not have access to draft technicians where we are. According to our staff, they have tried to increase pressure on the units and it works for a little bit but then the beers get "over carbonated" and foam again. (I am not sure how that works since the temperature averages about 20+ºC, but this is based on their experience) 

    Does anyone have any advice on other avenues we could pursue to reduce the foaming?

    Thanks



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    Bryan Doran
    Head Brewer
    Cambridge MA
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  • 2.  RE: Draft Excessive Foaming

    Posted 10-13-2025 18:15

    Hi Bryan,

    I'm not familiar with the system you are using.  The only thing I can think of is if the foaming beer is happening in both taps I would look at the refrigeration system inside the unit, maybe you are getting some freezing in the beer lines inside the unit, or warm spots in the coils, that are creating the foam breakout.  Can you swap the unit with one you have to see if the problem moves?      If the issue is only on one tap line then I would suspect cracked gaskets or blockage in the line somewhere, especially up inside the tap restrictor assembly.  

    If CO2 pressure increase does seem to help reduce the foaming for a while, you may need to look at nitrogen blending systems so you don't overcarbonate the kegs.  Often nitrogen blend systems are used in longer tap lines but I've found in some applications where they've helped on shorter draft lines to help offset other inadequacies within a draft system.  These aren't cheap devices but work well, so I'd exhaust any other ideas before you buy one though.   Micromatic and McDantim are good units to look at.   Good luck



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    Cheers,
    Curtis Holmes
    Alaskan Brewing Co
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  • 3.  RE: Draft Excessive Foaming

    Posted 10-14-2025 08:19

    Hi Curtis,

    Thanks for your response. We are swapping out the unit to see if the problem persists. 

    As to beer gas or even a qualified draft technician, these are not something available in Kigali. It makes it more fun to have to overcome challenges...



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    Bryan Doran
    Head Brewer
    Cambridge MA
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  • 4.  RE: Draft Excessive Foaming

    Posted 10-14-2025 09:00

    Sorry that my signature had my previous location not where I actually am...



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    Bryan Doran
    Head Brewer
    Kweza Craft Brewing
    Kigali, Rwanda
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  • 5.  RE: Draft Excessive Foaming

    Posted 10-15-2025 07:31

    Bryan-

    There are some steps you can take to determine what is causing the excessive foaming.

    First, pour a glass of beer and immediately place a thermometer in the glass. The result will tell you if you are too cold or warm and you can make a repair to the system to compensate. Ideally, you want to have a 38 degrees F, or 3.33 degrees C, temperature in the glass. 

    Secondly, (assuming your ABV is about 5.5%) head pressure on the stored kegs needs to be 13 psi at an elevation of 1500m, if you are using 100% CO2 and are pouring beer at 38 degrees F. Go to the APP Store and download "Easy Blend by McDantim". This APP will illustrate the relationships between temperature, pressure, Volume of CO2 in the beer, Altitude and ABV. It will also help you determine if you need to use a CO2/Nitrogen blend of gas in the system and which blend will work.

    Third, you need to determine what pressure works best for this system. Get out your stopwatch and physically "time" a beer pour. You want to pour 2 ounces of beer per second. That would be 8 seconds to pour a pint of beer, or 8.5 seconds for a 1/2 liter of beer. 

    These are the three key components of a draught beer system that you, the on-site draught beer technician needs to determine to repair the problem. With this information and the Easy Blend App, you can solve this!

    Best regards,



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    Bob Bernier
    Retired from Matheson Gas
    Auburn, ME
    207-740-8256
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  • 6.  RE: Draft Excessive Foaming

    Posted 10-15-2025 23:04

    Hi Bryan,

    You can also download the Brewers Association Draught Beer Quality Manual.  It's a great resource and we are very fortunate that it is free of cost.

    https://www.brewersassociation.org/educational-publications/draught-beer-quality-manual/

    I agree.  You can solve this on your own.

    Best regards,

    Andrew



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    Andrew Fratianni, Dipl. Brew.
    Sr. Enzyme Application Specialist
    Brewing & Distilling Enzymes
    IFF Health & Biosciences
    andrew.j.fratianni@iff.com
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