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Will a Toilet Leak Cause Water Damage to the Floors Below?

11/02/2025 | Hawkrown

With the development of the economy, many families choose to install a toilet when renovating their bathrooms. So, will a leaking toilet cause water to leak down to the lower floor? Let's take a look together.

Will a leaking toilet lead to water leaking to the floor below?

Bathrooms typically have a waterproofing layer, so water should not leak down to the lower floor. However, the key factor is whether the bathroom floor has been properly waterproofed. If no waterproofing treatment has been applied, water can leak down, and you may be held liable for any damages. Therefore, it's advisable to occasionally check for any issues with your toilet. If there are any damages, they should be replaced promptly to avoid unnecessary problems.

How to choose a toilet?

1、Check the appearance and choose a model that fits your needs. Some models come with a child seat for convenience, which can be replaced when the child grows up. There are wall-mounted and floor-mounted options, so it's essential to measure the distance between the drainage holes to select a suitable one for your bathroom. The distance between the drainage holes is typically 30 cm or 40 cm. If it's 35 cm, you should select the 30 cm option.

2、Examine the luster of the glaze. The better the glaze, the higher the quality. Check if the toilet features double siphon technology for better flushing efficiency. You can use a ping pong ball for testing; the national standard allows for 4 to 5 flushes at once. A high-quality toilet can often achieve around 8 flushes in one go.

3、Check whether the flushing components are produced by reputable manufacturers. You can tell from the exterior, and it's important to see if it employs a one-piece molding process. Look at the straight sections between the back of the toilet and the lid; if there’s a hoop, it indicates that it’s not made as a single piece, which may be more affordable, whereas the absence of it suggests a one-piece technology.

In summary:today we've discussed whether a leaking toilet can lead to water leaking to the floor below and how to choose a toilet. If you wish to learn more, please continue to follow our content, as we will provide more exciting information in the future.

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