A still of stainless steel is to be preferred, and will virtually last a lifetime. This type of still is quite expensive to buy, but use brings no deterioration in value. Stainless steel always looks new.
A good still has a column. The column filling provides a good contact surface area, resistance that is not too high and good runback. A good stainless steel milking machine coupling is located between the column and the boiling vessel. The length of the column and the dimensions of the cooling tubes, etc. are designed so that high steam resistance is avoided. The apparatus is scientifically dimensioned so that when the spirit is exhausted the process stops. No more spirit comes out of the cooler.
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