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The float raft in the toilet bowl is broken, check it, can't turn off the water to enter, it's always flushing, understand?
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The floating ball in the tank is set with too high water level or the water supply is not tightly sealed.
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The water level of the water tank is too high, and it will leak out if it exceeds the water seal, so take it down and adjust the water level.
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The tank float is damaged and replaced OK for a few bucks.
You can find a plastic film to do it, and here's how:
Rinse it with more water, first of all, if you don't know how to dredge it, you can ask a professional person to do the dredging, many places or call 114 to inquire can be found. It's all possible.
My family just bought a 10 quick money plug, which can only go into the water, and will not return to the water and taste, and it will be sold in general places.
It should be wealth, but in fact, it may be thirst while sleeping.
It's blocked, but it's not bad. You just need to buy a bottle of sulfuric acid or hydrochloric acid and pour it in, and it will be clear in a while. No need to spend unnecessary money on people who are unblocked.