Why Is My Toilet Leaking Water When I Flush? Common Causes and Solutions

Toilet leakages, especially after prolonged use, can lead to malfunctioning. When water leaks out during flushing, it’s important to identify the cause. Let’s explore the possible reasons and solutions.

Potential Causes of Toilet Flush Leakage

It could be due to improper sealing when the toilet was installed. For instance, if the flange at the bottom is not aligned with the drain, or if the dimensions of the toilet's drain and the sewer do not match.

Another possibility is that there’s an issue with the seal at the bottom of the toilet, such as aging or damage to the flange or the silicone sealant.

Solutions for Toilet Leakage When Flushing

When the toilet leaks upon flushing, the first step is to determine the cause and the specific location of the leak. Different causes require different solutions:

1、If the leakage is due to misalignment of the flange at the bottom of the toilet with the drain, it's best to call a professional for an inspection. Once a flange has been used, it cannot be reused, so it should be replaced with a new one, ensuring proper alignment with the drain.

2、If the leak is caused by a mismatch in sizes between the toilet's drain and the sewer, you either need to replace the toilet with a compatible model or add a flange to the drain to prevent leakage during flushing.

3、If the leakage is due to aging or damage of the flange at the bottom of the toilet, replacing the flange with a new one is necessary. Similarly, if the silicone sealant at the base of the toilet is damaged or aged, reapplying silicone sealant around the base will help.

summary：This covers the details regarding what could be causing toilet flush leakages and how to address the issue effectively. It's crucial to identify the underlying cause and apply the appropriate solution based on the situation.