For the new keg of your.Is made of AISI type 304 stainless stell,right? Because now SERM SUK PLC.They Checking Culture Germs. within the tank.Your keg is stainless steel kind?
All inside surfaces are smooth to prevent any possible dirt or contamination from remaining inside after washing and sterilizing.
Stainless steel does not react to magnetic attraction and its colour does not change due to cleaning or sterilizing.
Germs.