Are Floor Drains and Toilets Connected to the Same Pipe？

Is the drain and toilet installed on the same pipe, and what should be done if the drain and toilet are blocked？

Are the drain and toilet on the same pipe？

Yes, they are on the same pipe, which is composed of a main pipe that gathers water from different branches. In other words, there are individual pipelines set up for both the drain and the toilet, and these pipelines may be separate in different rooms. There is a main pipeline connected by PVC pipes of different diameters, which is typically laid out before the home renovation. The toilet and drain can then be installed directly afterward. If there are any unreasonable issues, modifications may be necessary.

The drainage pipe structure in a bathroom can be U-shaped or straight. If the U-shaped option is chosen, it takes up less space and has a strong drainage capability. The straight drainage pipe structure is simpler and can help save water; it is generally used in public restrooms.

What are the differences between the drain pipe and toilet pipe？

1、The diameter of the drain pipe and toilet pipe differs; the drain pipe typically has a diameter of 50 mm, while the vertical pipe needs to be at least 75 mm. For common use, the diameter can range from 75 mm to 160 mm.

2、The toilet's drainage pipe usually has a diameter of 110 mm, so it’s important to know the specific sizes of the drainage pipes during installation.

What to do if the drainage pipes of the drain and toilet are clogged？

1、When either drainage pipe is clogged, the main approach is to ensure proper unblocking. Depending on the severity of the blockage, common methods include flushing with hot water or using water pressure.

2、You may also use pipe cleaning agents or caustic soda solutions. If there are foreign objects inside, you may need to fish them out using a spring drain cleaner. These are common methods that tend to be quite effective.

In summary：The drainage pipes of the drain and toilet are part of the same system, connected to the same drainage pipe. If not used properly, they can easily become clogged.