If you are using a Zahm Nagel chart, the carbonation levels are based on perfect equilibrium. The PSIG recommended represents an additional two pounds "push" pressure. Try to use six feet on all of the products if they have the same carb level. Trim back four inches at a time if flow is too slow at 14 PSIG.
If line is too short after trimming, we may have to go to two different line sizes.
Scott Zuhse, Instructor
Micro Matic Dispense Institute