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It's used to install nails to fix the toilet, but now you don't need it, just use glass glue.
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!! for pooping
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It is a drain, and you can choose which one to use according to the size of the toilet drain from the wall.
The shooting is not particularly clear, it should be fixed to the ground, this has nothing to do with pumping, and it does not affect.
I can only tell you that this product is not up to standard and should not be branded.
Raise your head to look at the bright moon and bow your head to think of your hometown. Min Nong (Li Shen).
1 All are generally like this, the installer looks at the distance between the center of the aperture of your toilet and the wall, and blocks one by one.
It is not used for air intake, those two are the toilet foot screw mounting holes. >>>More