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You mean, leave a few floor drains in the bathroom. It depends on whether the ground you make is high and low. If the ground is done. Then leaving one is not a problem. It's okay if you don't do two well. Otherwise, there will be water.
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There is usually a place left for one.
If there are 2 of them, it means that they are good designers and real estate agents.
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Most people have only one, it is better to keep two.
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Under normal circumstances, the bathroom needs two floor drains, one is used in the urban area, that is, the shower room is drained, and one can be used in the dry area, that is, between the washbasin and the toilet, not more than three, the number of more ground will become pockmarked face, and the floor drain mouth waterproof is more difficult to handle, too much floor drain tile is more troublesome, in the choice of floor drain to choose odor-proof better.
It is not necessarily the problem of floor drain, it may be that the water pipe joints in the wall are loose and leaking, and the most problematic problems in the waterproof structure are the corners of the wall and the edge of the floor drain pipe.
The fattest person in your house can enter, and then multiply by 2 to get the total number of sliding doors to be left.
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Based on the information you provided, I feel that it is likely to be a problem with the waterproof layer, or a problem with the toilet drain pipe, but it is certain that it is not a problem with the water pipe. Here's why: >>>More
That's the drain backwater, coming back from the main pipe, open the drain cover and check it.