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It shouldn't be, it's the reason why the bathroom drain is there, it usually doesn't stink, it should stink when you pour water from the sewer or something.
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Maybe there is too much storage in the sunken bay, just let it through.
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If that's the case, it's recommended that you take a look at the backwaterbend.
Is it water seeping from the place where the toilet comes into contact with the ground? If so, it should be that the sealing ring is not installed properly. Let the installer show you.
It may be that the flush port of the water tank is not tightly sealed.
1. If you live upstairs or downstairs, if you live on the first floor, you can dig down, you can dig 30cm; After the floor is covered with concrete and waterproofing. >>>More
The high-rise toilet is particularly smelly, and no one will use the exhaust pipe as a sewage pipe, not a pipe all the way, mainly caused by the exhaust pipe is not smooth.
There is a part, but not all;There are several causes of bathroom odor, see below: >>>More