How to transfer the beer after fermentation As well as collecting samples, the valve can also be used to transfer the beer after fermentation. Simply connect a hose (10 mm (0.4”) inner diameter) to the opening and open the sample valve on the GF30 or SF70. Image: SF70 Related articles How do I collect a sample? How often should I dump dead yeast and dry hops? General process of fermenting How long can I leave my beer in the fermenter after the SG reading is stable? What do I do if the final gravity (FG) is higher than expected?