Understanding the Differences Between 400mm and 300mm Toilet Piping Distances

The toilet is one of the essential facilities to purchase for a residence. However, many homeowners are not clear about the suitable pit distance for their toilets. What are the differences between a toilet with a pit distance of 400 mm and one with a distance of 300 mm? Let’s take a look.

一、Differences between 400 mm and 300 mm pit distances

The central position of the drainage pipe and the distance from the wall are different.

1、A toilet with a 400 mm pit distance means that the distance from the center of the toilet to the wall is 400 millimeters.

2、A toilet with a 300 mm pit distance means that the distance from the center of the toilet to the wall is 300 millimeters.

3、If a toilet designed for a 400 mm distance is installed in a location intended for a 300 mm distance, there will be a 100 mm gap. Conversely, if the pit is 300 mm and you purchase a toilet with a 400 mm distance, it cannot be installed at all. Therefore, the difference in pit distances requires careful measurement before purchasing the appropriate toilet.

二、Which pit distance is better?

There is no absolute superiority between a 400 mm pit distance and a 300 mm pit distance; it depends on measuring the actual size of the site. It’s also important to account for the thickness of the tiles in the bathroom. If this is not considered, the toilet may not fit properly. When buying a toilet, check the drainage area. If the inside of the pit is relatively smooth, it will be less likely to collect dirt, making it easier to maintain. However, if it is rough, there may be issues with flushing, so it is advisable not to purchase those types.

When measuring the pit distance, it is crucial to be precise, maintaining the same horizontal direction and aligning the outlet with the drainage pipe. Additionally, consider the thickness of the tiles, as measurements are often taken in unfinished spaces where tiles haven’t been laid yet. Typically, tile thickness is around 20 millimeters, so adding this to the determined pit distance will ensure the toilet can be properly installed.

conclusion：

this article has introduced the differences between a toilet with a 400 mm pit distance and one with a 300 mm distance. We hope this information is helpful. For more related knowledge, please continue to follow the QiJia consultation platform.