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Anonymous users2024-01-24Many schools are like this, whether the rules are standardized depends on what your education department says, and your qualifications depend on whether you will do .........
Because there are no buildings with dual water supply systems in China, because the main valve and sub-valve do not have one-way check valves, under the action of negative pressure, the polluted water will flow back into the tap water system, as you said, the water from the toilet will flow back to the kitchen faucet; However, the amount of water that is generally returned will not be very large, so turn on the tap water and put more water in it, and the water will become clear. If you don't have any worries, you can avoid this by installing an anti-backflow device on the toilet tank.
Under normal circumstances, it does not stink. Hope mine can help you!
Buried water pipe joints or pipe bodies are leaking. It needs to be opened from scratch.
This is recommended not to be bought, because if there is a water room and toilet downstairs, then you will be prone to moisture if you live on it, and it will not taste good if you open the window.
There are toilets and washing rooms in my school.