rubber bung

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  1. G

    Grainfather pro fermenter stopper size?

    Does anyone know what size rubber stopper the Grainfather Pro conical fermenter uses?
  2. rycardo

    GrainFather G30 - Active Fermentation

    Hello Everyone, I own a GrainFather Canonical Fermenter Pro, during my fermentation process I noticed the Rubber Bung is lifting and some Co2 is going out through the space between Rubber Bung and the fermenter. Do anyone had this issue? How to fix? I’m using some weight to keep the Rubber Bung...