The Common Causes of Toilet Overflow in Floor Drains

When a toilet is used for a long time, various problems may arise that affect normal usage. Timely intervention is needed to address these issues. One common problem is the backflow of drainage from the floor drain when flushing the toilet. Here are some reasons for this issue:

The Common Causes of Toilet Overflow in Floor Drains

1. Floor Drain: If the floor drain is a standard type, it may have poor drainage capacity. Given that the bathroom floor has a high volume of water drainage, blockages can easily occur when the toilet is flushed. In this case, it is necessary to replace the floor drain with one that has anti-backflow features.

2. Drainage Pipe: After the main drainage pipe in the bathroom is installed, a T-junction needs to be set approximately ten centimeters from the ceiling, connecting to the branch pipe. If the branch pipe is too long and is installed without an adequate slope, it may create a negative slope, leading to backflow issues when the toilet is flushed. In this case, the drainage pipe should be reinstalled with the necessary slope.

3. Pipe Fittings: It is essential to connect the main drainage pipe and the branch pipes using T-junctions. Each upward branch also requires the installation of a T-junction, especially at the connection between the branch pipe and the floor drain. If the T-junction is installed incorrectly, the significant volume of water flowing from the toilet can follow the slope into the floor drain pipe, causing backflow. In this scenario, the incorrectly installed T-junction needs to be removed and reinstalled properly.

4. Main Water Pipe: If the main water pipe in the bathroom is blocked, water from the toilet will not drain quickly, leading to accumulation in the pipe. Once the water volume builds up, backflow will occur at the floor drain. A professional should be called to clear the blockage in the pipe.

In summary：the reasons for backflow in the floor drain when flushing the toilet have been outlined in detail above. I hope this information helps those in need. If you would like to learn more related knowledge, please continue to visit our website for more exciting content to come.