To install the pump, you just need to put the tube into the bottle and put the pump on the neck of the bottle. Everything, the whole installation. I tried to put both on the 19-liter and on the 5-liter, it holds everywhere. The flow rate is small, well, a 5-liter kettle will not fill in 30 seconds. Doesn't give any taste to water. There is no plaque on the tube. If you have a nasty taste when using the pump or "the tube is covered with mucus" - change the water, it is of poor quality! Also in the comments they wrote about "vibration when charging" - in order for the pump not to vibrate when charging, it must be turned off.
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