G'day, not sure if i found the right area in this forum to post my query but here we go... I've been fermenting and bottling home brew for about a year now and have learnt many many things. I've recently bought a 19litre post mix keg with CO2 gas cylinder. I've fermented my beer and transfered it into my post mix keg where i have been maintaining the CO2 pressure to around 250kpa every 6 hour for 3 days in a 5 degree celcius environment. After those 3 days i dropped the headspace pressure of the keg to keep it at around 70kpa to pour my first beer and for the life of me cannot figure out why my beer is pouring majority head or foam. Any suggestions would be greatly appreciated! Cheers