Common Causes of Bathroom Drain Leakage and How to Address Them

After prolonged use of the bathroom, issues like leaks can easily arise in areas such as the floor drain and the drainage pipe of the washbasin. So, how should one handle water leakage from the bathroom floor drain to the lower floor? Let's learn together.

How to deal with water leakage from the bathroom floor drain to the lower floor

First, identify the reason for the water leakage in the bathroom floor drain, then find the responsible party, and have them take appropriate measures to remedy the leak. If the leakage is due to poor quality of the drainage pipe under the floor drain, causing cracking, and the property is still under warranty, you can request the developer to fix and compensate for the leak. If the warranty period has expired, you can ask the property management company to apply for the building maintenance fund to carry out the repairs. If the issue is due to poor waterproofing or aging of the waterproof layer in the upstairs owner's bathroom, then the responsibility to fix and compensate falls on the upstairs owner.

Tip: There are various reasons for water leakage from the bathroom floor drain, and the different causes will lead to different responsible parties and varying repair measures. When you notice water leakage from the bathroom floor drain, it is essential to first determine the source of the leak. If you cannot find the cause or do not know how to repair it, you can have a professional come to help with the inspection and repair.

How to repair water leakage from the bathroom floor drain

1. If the leakage is due to damage or aging of the waterproof layer around the upstairs bathroom floor drain, and the problem is relatively minor, you can apply waterproof coating around the floor drain without removing tiles. If the leakage issue is serious, you should remove the floor drain and the surrounding tiles, chisel out a groove around the floor drain, clean the area, then use a cement-based waterproof agent to fill and level it, and finally re-tile with new tiles.

2. If the leakage is caused by cracks or aging in the main drainage pipe of the floor drain, you should also remove the floor drain and the surrounding tiles, and then use a leak sealing agent to fill the gaps. Alternatively, you can replace the drainage pipe of the floor drain upstairs with a new one from the downstairs bathroom.

In summary：check whether the bathroom floor drain and drainage pipe have been installed correctly. Often, if this position is not installed properly, you will need to use sealing materials to waterproof and seal between the floor drain and the drainage pipe with a cement sand layer, so that the drainage will flow directly into the drainage pipe.