How to Fix Drain Backflow Problems Caused by Upstairs Plumbing

Having backflow in the floor drain of your home due to the drainage from the upstairs is an issue that needs to be addressed promptly to ensure normal usage in the future. Let’s explore why this backflow occurs and how to handle it.

Reasons for Backflow from Upstairs Drainage

The most likely reason for the backflow in your floor drain is a clogged pipe, preventing water from flowing out, leading to backflow from the floor drain in the downstairs bathroom. In such cases, it is essential to contact professional maintenance personnel promptly to clear the blocked pipe and avoid a recurrence of the backflow situation, ensuring a normal home life.

How to Handle Floor Drain Backflow

1. If backflow occurs in the floor drain, it is crucial to identify the cause of the issue and address it accordingly. For instance, if the sink and the floor drain in the bathroom share the same drainage pipe and it hasn’t been designed properly, backflow is likely to happen. In this case, it may be necessary to reinstall the drainage pipe to permanently resolve the issue.

2. If the floor drain is clogged, pipe clearing will be necessary. Begin by cleaning around the drainage pipe opening, then pour water into the pipe to locate the trap, and perform the necessary clearing to unblock the drain.

3. If backflow occurs in the floor drain and it is confirmed to be due to a clogged drainage pipe, you can use a wooden stick that is similar in diameter to the pipe to unblock it. Gently insert it into the floor drain and dislodge the blockage to restore normal flow.

4. Alternatively, you can use vinegar and baking soda to clear the drainage pipe. First, pour baking soda into the floor drain, then add vinegar and let it react for a while. This method effectively breaks down grease and debris in the pipe, thus aiding in clearing the blockage.

In summary：we have discussed why backflow occurs in your floor drain due to upstairs drainage and how to handle it. It is essential to address backflow issues promptly; otherwise, it will significantly affect your household, making living conditions unfavorable.