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More than 300 yuan, not expensive, 3M faucet water purifier, not bad.
The tap in the kitchen has some shadow water on the surface, and if it is limescale, you can clean it with white vinegar.
I think this situation is also a very normal phenomenon, and now the structure of the house is very rational, and I think it is very normal to be like this. It's the same thing with this building, so I don't think there's anything special about it. It's a very normal phenomenon.
This is definitely done to be waterproof, water splashing on the wall will make the wall fall off.
Yes, many large tanks, especially seawater tanks that require automatic water replenishment, are common.
Yes, white vinegar contains certain cleaning elements, and soaking it with water is helpful for cleaning the filter element. Don't use too much of it, otherwise it may cause a chemical reaction.