Air Compressor for Foreign Beer Published September 14, 2013 at 3264 × 2448 in GBBF: CAMRA Bar Management Training No nasty CO2 at GBBF – kegs are pressurised with good old “air”. Hm. Fine so long as beer sells FAST. No nasty CO2 at GBBF – kegs are pressurised with good old “air”. Hm. Fine so long as beer sells FAST.