Why Is My Toilet Not Siphoning? Top Causes Explained

The sudden loss of siphon in a toilet can occur for several reasons, and identifying the underlying cause is essential for effective resolution. Below, we discuss the possible reasons for a toilet suddenly not siphoning.

一、Toilet suddenly not siphoning: what are the reasons

1、It may be caused by a blockage in the drainage pipe. Generally, drainage pipes are quite wide, and as long as you don’t throw items like toilet paper into them, blockages are unlikely to occur.

2、It could be due to improper sealing at the bottom or a misalignment of the holes. Usually, without moving or repositioning the toilet, this situation shouldn't arise.

3、An excessive build-up of scale in the S-bend trap may lead to the toilet not siphoning.

二、Toilet usage precautions

1、When using the toilet, especially during flushing, pay special attention to the toilet lid. Otherwise, bacteria or microorganisms may directly land on the walls or washcloths, which can impact people's health.

2、The toilet seat is often a neglected area. It is quite prone to pollution and comes into direct contact with the body. Therefore, it’s important to clean it regularly. It’s recommended to wipe it with disinfectant every few days.

3、After using the toilet, you should clean the residue inside; otherwise, it can attract dirt and breed bacteria. Additionally, when cleaning, make sure to lift the toilet seat and use a detergent to thoroughly clean it.

4、The toilet brush should also be kept dry to avoid becoming a source of contamination. After use, be sure to rinse it with water, place it in a well-ventilated area, and keep it dry. Regular disinfection is also suggested to ensure hygiene.

summary：

the above are the possible reasons why the toilet suddenly stops siphoning. By addressing these related issues, you can effectively resolve the problem.