There is also a slag outlet at the bottom of the ceramic jar, which can effectively discharge the skin residue during fermentation of dry red wine. Of course, as accessories for traditional fermentation jars, there are also bottom valves, sampling valves, temperature gauges, and one-way valves.
The food-grade stainless steel cover at the bottom of the jar has sealing properties that ordinary ceramic jars do not have. Together with the one-way valve and the volatile acid control device we invented, it can maximize the protection of the aroma of the grape wine.