Two Holes at the Bottom of a Toilet: What You Need to Know

The toilet is used frequently, so proper installation is very important. Many friends have noticed that there are two holes at the bottom of the toilet. Let’s take a look at why there are two holes at the bottom of the toilet.

一、Why Are There Two Holes at the Bottom of the Toilet?

The two holes at the bottom of the toilet serve different purposes: one is the wastewater outlet, and the other is a reserved outlet. These two holes are mainly used to connect to the drainage pipe and accommodate different pit distances. During installation, you can choose the appropriate waste outlet based on the reserved pit distance in your bathroom. If the distance from the reserved outlet to the wall corner is 30 cm, you would choose the hole at the back of the toilet, while if it's 40 cm, it is recommended to select the front hole. After making your selection, the other hole should be sealed using special sealing mud. It’s important to pay special attention to the sealing process; if the sealing is not effective enough, there's a high possibility of water leakage from the bottom of the toilet when flushing.

二、What Causes Odors from the Two Holes at the Back of the Toilet?

1、Poor Sealing

The two small holes at the back of the toilet need to be sealed with silicone sealant. If they are not well sealed, it can lead to odors returning from the drainage area.

2、Seal Ring Failure

If the toilet flange seal ring is aged or not installed properly, this can cause odors to return. In such cases, it is recommended to completely seal the two holes at the back of the toilet with sealant or reinstall the toilet, ensuring that the seal ring is properly sealed.

When reinstalling the toilet, special attention should be given to cleaning the base of the toilet thoroughly and ensuring it is flat. If the area is not clean or even, it is advisable to remove the old sealant, then place a new seal ring on top of a silicone sealant layer before reinstalling the toilet. Once the sealant is applied properly, there should be no odor issues.

In conclusion：this article introduces related knowledge about why there are two holes at the bottom of the toilet. We hope it helps everyone. For more related information, please continue to follow the Hawkrown Network consultation platform, as we will bring you more exciting content in the future.