i think it would be fine...i use a 12 inch or so in my keggle, and no problems. def better than braided hose. I believe that the speed would be the only change, 15 inch would drain better.
I think it's too bad that everybody's decided to turn on drugs, I don't think drugs are the problem. Crime is the problem. Cops are the problem. Money's the problem. But drugs are just drugs.