Understanding the Difference Between 300mm and 400mm Toilets: What You Need to K

When installing a toilet, it’s important to pay attention to the toilet's rough-in dimensions, as different toilets have different rough-in measurements. Next, let's explain what 300mm and 400mm mean in relation to toilets.

What do 300mm and 400mm mean for toilets？

These measurements refer to the distance from the center of the toilet's waste outlet to the wall, specifically 300 millimeters or 400 millimeters. There are many types of toilets available in the market, and the rough-in measurement can vary, so it's essential to determine the rough-in distance before purchasing a toilet to avoid installation issues later on.

How to measure the toilet rough-in distance？

1、Measuring the rough-in distance is quite simple: begin at the center of the toilet's drain pipe and measure to the wall. Be sure to consider the thickness of the wall tiles when measuring; the rough-in distance is typically either 400 millimeters or 300 millimeters.

2、The toilet's drainage method can be categorized as either floor-mounted or wall-mounted. Wall-mounted toilets generally require a rough-in distance of about 180 millimeters and can only support direct flush toilets. For floor-mounted toilets, the rough-in measurements typically include 200 millimeters or 400 millimeters.

What to pay attention to when buying a toilet？

1、Avoid buying toilets that are too lightweight.

There are many types of toilets on the market, and when purchasing one, you can lift it to assess its weight. Generally, a heavier toilet indicates better quality. Avoid opting for overly cheap options that may be too light, as these are often of inferior quality.

2、Don’t buy toilets with poor flushing ability.

When selecting a toilet, it's vital to consider its flushing power. Avoid toilets with inadequate flushing capabilities. It's a good idea to test a toilet's flushing ability before purchasing. Opt for larger waste outlets or vortex-style flushing systems for better performance.

3、Avoid toilets with rough drainage outlets.

When purchasing a toilet, check the smoothness of the drainage outlet. If it feels rough and not smooth, it's advisable not to buy it, as rough drainage systems can accumulate dirt and may lead to clogs, complicating the flushing process. Choose toilets with smooth surfaces.

In summary：this concludes the explanation of what 300mm and 400mm mean in relation to toilets. I hope this information helps you. If you want to learn more related knowledge, you can check out the articles on Hawkrown.