This product (Interbrew) is referred to as a "refermented" beer. The carbonation specification is 2.8 v/v with a range of .4 on either side. Due to the refermentation in the package, the carbonation level can be difficult to dial in since it has a significant range. Also, the specification is in the high range meaning it will be temperamental.
We are in the process of consulting with Interbrew as to the best practice for dispensing as they are committed to assuring that their products are enjoyed as intended.
At this time, you may want to begin dispensing at 18 PSIG with 10 to 12 feet of 3/16" beer line. Hopefully you will not require additional PSIG since the carbonation could raise in the +3 range. Let us know how this works out.
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