Well I imagine the absolute max a Co2 tank can put out is 600-800 PSI depending on temp. Now my regulator doesn't let me go above 40 psi, so that's the max for me. As mentioned if you are going to put more than 12 or so PSI of pressure on the beer you'll overcarbonate unless you switch to beer gas (Nitrogen/Co2 mix). The real solution to your issue is to use lareger diameter hose, just use 1/4" ID and you'll be fine for 20ft. I think to balance it you still may need to add some 3/16" or some other way to reduce pressure that have been talked about.
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"People should not be afraid of their governments. Governments should be afraid of their people." - V
Primary: Nothin
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash
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