What is a Rimless Toilet? And Why CleanFlush® Takes It Further

Why have Rimless Toilets Become So Popular?

Traditional toilets use a concealed box rim to distribute water around the bowl during a flush. While effective, the rim creates hidden areas where dirt, bacteria, limescale and grime can build up over time.

Rimless toilets remove this hidden cavity entirely, creating an open bowl design that is easier to access and clean.

For homeowners, cleaners and families, this offers several benefits:

• No concealed areas where dirt and bacteria can accumulate
• Easier access when cleaning
• Less scrubbing and fewer hard-to-reach surfaces
• A cleaner, more contemporary bowl design
• Improved visibiity across the entire bowl interior

This combination of hygiene, simplicity and modern design has made rimless toilets the preferred choice for many Australian bathrooms. 

Removing the Rim Created a New Engineering Challenge

What many people don't realise is that the traditional rim served another purpose beyond hygiene.

For decades, the box rim acted as a water management system, helping direct and control water as it washed around the bowl.

When the rim is removed, that built-in method of controlling water disappears.

This means a rimless toilet must rely entirely on hydraulic engineering, bowl design and water flow management to achieve the same level of bowl wash, flushing performance and waste removal.

In other words, removing the rim improves accessibility and cleaning, but it also makes flush performance more difficult to engineer.

This is why not all rimless toilets perform the same.

Rimless Doesn't Automatically Mean Better Flushing

Rimless describes the shape of the bowl.

It does not describe how effectively the toilet flushes.

Two rimless toilets may look similar on the showroom floor yet perform very differently once installed.

The difference comes down to how effectively the flushing system:

• Controls and directs water movement
• Washes the entire bowl surface
• Cleans key contact areas such as the drop zone
• Manages splash and water containment
• Removes waste from the bowl efficiently 

A well-engineered rimless toilet should deliver both hygiene and performance. Achieving one without the other means compromises for the user. 

Introducing Caroma CleanFlush® Rimless Technology

Caroma CleanFlush® was developed to overcome the engineering challenged created by removing the rim. 

Rather than simply eliminating the concealed rim, CleanFlush® re-engineers the entire flushing system to work as a complete solution. 

The result is a toilet that combines the hygiene benefits people love about rimless design with the flushing performance expected from a premium Australia toilet.

What Makes CleanFlush® Different?

Controlled Water Flow

CleanFlush® is designed to direct water where it is needed most. 

Rather than relying on a concealed rim to distribute water, the system uses carefully engineered water flow to deliver effective bowl wash while maintaining control throughout the flush. 

Considered Bowl Coverage 

Effective cleaning is about more than simply moving water around the bowl. 

CleanFlush® is designed to provide thorough bowl coverage, helping rinse the internal surfaces that matter most during everyday use. 

Engineered Waste Removal 

A toilet isn't judged by how it looks. It's judged by how reliably it performs. 

CleanFlush® has been developed as a complete flushing system, where the bowl geometry, water movement and waste pathway work together to support effective waste removal and everyday reliability. 

Designed Around Real Use 

Every aspect of the bowl has a role to play in performance. 

That includes the drop zone, the area most likely to come into contact with waste during use. 

CleanFlush® considers the relationship between bowl shape, water coverage and waste movement to help deliver a cleaner result after every flush. 

Why the Drop Zone Matters 

Most people never think about the drop zone until a toilet performs poorly. 

The drop zone is one of the most important areas within the bowl because it influences both bowl cleanliness and flushing performance. 

A well-engineered toilet needs to do more than rinse the sides of the bowl. It must effectively clean and move waste from the areas where waste is most likely to enter the pan. 

By considering the drop zone as part of the complete flushing system, CleanFlush® helps ensure bowl wash and waste removal work together, rather than as separate functions. 

Confidence in Every Flush 

The best toilet is one you never have to think about. 

You press the button, waste is removed effectively, the bowl is cleaned, and the toilet is ready for its next use. 

That's the standard consumers came to expect from traditional box-rim toilets, where the rim helped manage water movement around the bowl. 

As rimless toilets became popular, manufacturers needed to replace that water control through smarter engineering. 

This is the difference between a standard rimless toilet and a true performance-led rimless system like CleanFlush®. 

CleanFlush® delivers the hygiene and cleaning advantages of an open rimless design while maintaining focus on what matters most: dependable flushing performance. 

Are Rimless Toilets Worth It?

Absolutely.

Rimless toilets have become the preferred choice for modern bathrooms because they are easier to clean, more hygienic and better suited to contemporary living.

However, the quality of the engineering behind the flush remains just as important as the presence or absence of a rim.

When choosing a toilet, it's worth considering not only how easy it is to clean, but also how effectively it performs the task it was designed to do.

After all, replacing an underperforming toilet after installation can be costly, disruptive and difficult, particularly in a finished bathroom.

That's why choosing a proven flushing system matters. 

Choose More Than Rimless. Choose CleanFlush®

Rimless design removed the hidden areas that made toilets harder to clean.

CleanFlush® goes a step further, re-engineering the flush to provide controlled water flow, effective bowl wash and reliable waste removal.

Because a toilet should do more than look modern.

It should perform properly, every single time.