I solved a lot of my foam problems by making sure that the beer line was larger then the ID of the shank. Most of these systems seem to come with 3/16" line to a 3/16" or 1/4" ID shank. They say to use the 3/16" line on kegerators but I have had more luck with a larger line. I also have found that some of my CO2 gauges were inaccurate. I have 6 regulators that I bought over the years and I have replaced half of the low pressure gauges for being off by as much as 30%. If all of that fails, there are restrictors that can be placed in the shank behind the faucet. I use those on my portable system with the 50' coils and no matter how shaken or warm the keg there is no foam after the first glass.
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