When connecting the drain tube to the siphon in front of the flask, there will be a sound of constantly dripping water. The speed of filling a full tank at a pressure of 4-5 atmospheres is about 2 hours. To taste, water sometimes turns out with a slight bitterness, apparently due to mineralization. Draining water into the sewer is a feature of this type of filter, you need to get used to this "not economical" use like an open faucet in the bathroom when brushing your teeth.
I decided to add some photos to give others a taste of what I experienced.
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