What s going on with the smell of the bathroom on the top floor

There are several reasons why odors can occur in the bathroom:

First, the length of the water pipe connecting the floor drain, toilet and washbasin is not enough, and the length of the qualified reverse bend is 5 cm - 10 cm, otherwise it cannot effectively prevent the rise of sewer odor.

Second, bathroom drains often have hair, grease, soap foam and other debris tangled together, forming a blockage, difficult to clean, rotten and deteriorating, but also a source of odor, proper use of sewer dredging agents can be greatly improved, but be sure not to use hydrochloric acid, sulfuric acid and other strong corrosive chemicals.

Second, the floor drain product is unqualified. At present, in order to increase the floor height and reduce the cost, many new residential areas use shallow water seal floor drains, and the qualified water seal layer of the floor drain should be 5 cm, and these shoddy floor drain water seal layers are only 1 to 2 cm, so they cannot prevent the odor from escaping.

Judging by my professional point of view, the possible scenario is.

First, the floor drain is not odor-proof.

Second, the bottom of the basin is not effectively deodorized, there is no U-bend, or there is a U-bend but the interface is not sealed.

3. The expansion screw holes at the back or on both sides of the toilet are not properly sealed (the floor drain and basin have been solved, but there is still a smell, please check).

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If there is a bath bomb in the ceiling, it may be a smell from the bath bomb pipe, because it is caused by the atmospheric pressure on a cloudy day, the air does not go up, and the bathroom is equipped with a backwater bend when decorating, and there will be no peculiar smell, if there is a bath bomb, then it is likely to be caused by the smell of the bath bomb.

2. Sanitary dead ends.

Some corners of the bathroom ceiling, such as the gaps in the ceiling, etc., these sanitary dead corners are not easy to clean, and at the same time, they are easy to ignore in daily cleaning, coupled with dampness and humidity, dust and other debris accumulated in the dead corners are easy to breed bacteria and produce odors.

3. The upstairs sewer pipe has an aftertaste.

There is a smell in the bathroom ceiling, and there may be a smell of the sewer pipe upstairs, and there is the smell of glue used in the joints of the sewer pipes.

Is it that the sewer does not have an exhaust hole, or that the sewer is leaking

The floor drain is filled with some water, and the floor drain is dry.