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Toilet Water Seal Issues: Why is It Slowly Falling and How to Fix It

09/01/2025 | Hawkrown

When using a toilet, some people find that the water seal slowly decreases. What causes the water seal to gradually drop? Here is a brief introduction.

Slowly Descending Toilet Water Seal: What You Need to Know

1、The water in the toilet trap can hold a certain amount of water, but if there are cracks or issues in the trap, the water can slowly leak out, causing the water seal to drop. If this is the problem, we can use materials like caulk to seal any cracks in the trap or replace the toilet altogether.

2、If the seal ring of the toilet is not installed properly, it can cause leaks, leading to a gradual decrease in the water in the trap. In this case, one can remove the silicone sealant at the bottom of the toilet, lift the toilet, reinstall the seal ring correctly, and then reinstall the toilet.

3、If you have a siphonic toilet, a blockage can cause the siphoning effect to fail, resulting in a lack of replenishment in the trap and a decrease in water level. You can use a drain cleaner, a hand-operated drain auger, a combination of baking soda and vinegar, or a plunger to clear the blockage.

Choosing a Toilet: What to Consider

When selecting a toilet, first measure the distance from the wall to the toilet flange to choose the appropriate rough-in for your toilet. Additionally, determine whether your bathroom uses wall-mounted or floor-mounted drainage; if it's wall-mounted, you should choose a wall-hung toilet. Throughout the purchasing process, carefully inspect the quality of the product, such as whether the toilet has a fully glazed surface and check for any stains, bumps, or cracks. During selection, you can also test the product to observe its drainage efficiency and whether it produces excessive noise.

In summary:this is a simple introduction to the reasons for the gradual decline of the toilet water seal. I hope that after reading this article, you will have a better understanding of the causes of water seal decline. For more related information, please continue to follow Hawkrown.com.

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