1)It's just as easy to rack sanitizer without pressure and you dont waste the gas. Not sure what the benefit is of doing it under pressure...transfers faster? Maybe I'm misunderstanding...
I mean I have a gallon of sanitizer in one cornie, and push it out the beer out post by gas pressure. The benefits, to my mind, are:
* the dip tube and out post is hit with sanitizer again on the way out; and
* one is left with a sealed, sanitized cornie
I use air from my air compressor to do things like pressure check or seal empty kegs and move non-beer liquids around.
I guess my intention was to make a bookend to Revvy's blog post that reminded us that AG is not a magic bullet and not a the optimum solution for everyone. Likewise, I do not think that kegging is a foregone conclusion, the next predetermined stop on the brewtrain to nirvana.
A cynic might wonder aloud if what's really happening is that folks get a half-grand into a kegging setup and then really need to convince themselves it was the most positive choice in their brewing lives. Luckily, I am not a cynic.