The floor drain in my bathroom has an S bend, but it still smells, what s going on, what to do

The S bend is also called the water trap, as the name suggests, there must be enough water in the elbow to achieve the effect of deodorization.

There is enough water that is definitely not the smell from the floor drain, check other places, especially the flue or well, it is also possible that the original floor drain or toilet has been displaced, and the original mouth is not sealed firmly.

In other sewer places, the flue well should be checked to see if there is a hole somewhere, perhaps on the ceiling, and ask the decoration master concerned. We've encountered this before, but in the kitchen. Anyway, if there is enough water in the S bend, it will definitely not smell like this.

I am the installer of the six-proof brand floor drain, we will also pay attention to the inspection of the toilet when we inspect the toilet for customers, after the installation of the toilet, there will be two holes left behind the toilet when it leaves the factory, which will smell out and plug him. It is also possible that the floor drain is smelling back, or it is a washbasin, and buying a six-proof anti-odor pipe can also be solved, I have seen a lot of such a problem, and it is easy to solve.

It doesn't have to be a floor drain, do you see if the washbasin has an anti-water inlet? If there is an inlet, are the inlets and the drains below tightly closed? And is the toilet sealed with the floor or drain? Is there any other place in the toilet that is not blocked with the ventilation below?

There must be enough water in the S-bend to achieve the anti-odor effect.