Daniel Vogel wrote:Is there an advantage that a wooden barrel offers over a piece of metal pipe?
Good question. Due to the friction in metal pipe, the temperature rises to 60 ° C, which leads to a partial loss of useful substances in the finished oil. And due to the contact with metal, the product not only risks "contamination" of unnecessary molecules, but also will lose omega acids due to oxidation. If you use a wooden press-barrel, you retain all the nutrients in the oil and avoid contamination.