When connecting the jg tube to the body, there are rubber seals, the resistance of which you feel when you insert the tube. There is no such thing in the connection unit and the seal behind the collet is not visible. It seems that it is not there, but there is no leak. Rated 5 solely because of the quality of the water. I drink without boiling (Favorite IVF). Bubbles form on the walls of the decanter / mug, but this is not a mineral water :). The water is very pleasant to drink, there is no disgust as from water filtered in a decanter even after boiling. The clamp must be tightened regardless of the squeak until no more than 9.75 mm remains between the ends of the clamp or it leaks, since the sealing ring is rigid.
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