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Why Is My Toilet Draining Slowly? Common Causes and Solutions

11/02/2025 | Hawkrown

Many people have encountered issues like a leaking toilet or slow drainage. Today, I will introduce the reasons for slow toilet drainage. Let’s take a look together.

Reasons for Slow Toilet Drainage:

The drainage might be slow due to several reasons:

1、The sealing ring might be damaged. Once the seal is compromised, it affects the negative pressure, resulting in slow drainage.

2、Improper installation can also impact drainage speed directly.

3、If the drainage is very slow, it could be due to a blockage in the drainpipe that needs to be cleared to resolve the issue.

What to Consider When Buying a Toilet:

1、When selecting a toilet, check if the glaze surface is even and smooth, and that the color is uniform without cracks or burrs. You can also tap the toilet; a good quality toilet will produce a clear sound, while a dull sound may indicate poor quality. Moreover, ensure the seller provides a trademark, warranty card, and quality certificate.

2、The water seal height in the bathroom's storage position should be at least 50mm according to regulations. Some high-end brands may have a water seal height of around 55 to 60mm, so make sure to check this when purchasing.

3、The siphonic toilet is a best-selling model due to its high pipe direction, generating a larger amount of wastewater during flushing, typically around 8-9 liters. Therefore, it is advisable to choose a water-saving toilet.

4、The direct flush method is relatively straightforward and less likely to cause toilet blockages or backflow. When purchasing, you should feel the inner surface of the drainage pipe. If it is not glazed, it may not effectively prevent odors in the long run, so don’t just take the seller’s word for it.

Conclusion:That’s all for today’s introduction on the reasons for slow toilet drainage and what to consider when buying a toilet. For those interested in more information, please continue to follow our website, as we will have more exciting content coming your way.

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