The Pros and Cons of Different Flush Systems

In this guide, we will take you through the pros and cons of different flushing systems, and why you may choose to consider them when planning your washroom design. 

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Gravity Flush System

The gravity flush system is perhaps the most common type found in households worldwide. Its operation relies on the force of gravity to flush waste away. When the flush lever is activated, a valve opens, releasing water from the tank into the bowl. The weight and volume of the water create enough pressure to push waste through the trap and into the sewer line.

The gravity flush system is a simple, reliable and familiar system that requires minimum maintenance to keep working correctly. Additionally, it is often a quieter option compared to many other systems, making it ideal for use in the home. However, it can be less water-efficient compared to newer systems if you’re looking to create an eco-friendly bathroom, and it may struggle to remove larger waste. 

The pressure-assisted flush system uses compressed air to force water into the bowl at a higher velocity, enhancing the flushing power. Inside the tank, there's a pressure vessel that stores air under pressure. When the flush lever is pressed, the valve opens, releasing both water and compressed air simultaneously, resulting in a more forceful flush.

A pressure-assisted flush system is an effective way to clean waste with less water usage whilst also reducing the likelihood of clogs. This flush system is particularly suitable for restrooms that experience a high volume of traffic, such as public bathrooms. However, their installations and maintenance can be more complex and more costly, and the noise generated is louder than gravity systems. 

A dual flush system offers a good option for water conservation by offering a choice between two options - a full flush for larger, more solid water, and a partial flush for liquid. Typically, this is controlled by two separate buttons on the toilet for each corresponding flush. 

A dual flush system can help significantly reduce water consumption for a more environmentally-friendly option, with flexible flushing based on waste type. However, like pressure-assisted systems, they can be more costly to initially set up and rely on the user knowing which button corresponds to which flush type and utilising them appropriately. Additionally, a dual flush system may not be appropriate for all plumbing configurations. 

The touchless flush system negates the need for physical contact with the flush lever or buttons by integrating sensor technology to automatically detect when to flush. Users simply approach or depart from the toilet, and the sensor triggers the flush mechanism accordingly.

This flush system can greatly improve hygiene levels by reducing contact with washroom surfaces, and are incredibly convenient for users, particularly in public restrooms. However, they require a power source to operate the flush, and there is a risk of malfunctions and sensitivity issues. 

The vacuum-assisted flush system operates by creating a vacuum in the trapway, rapidly pulling waste from the bowl into the sewer line. When the flush is activated, a valve opens, allowing water to flow into the bowl while simultaneously creating a vacuum, which efficiently evacuates waste.

Vacuum-assisted flush systems are most suited to areas with low water pressure, and are an effective waste removal method with minimal water usage. Additionally, they are less prone to clogs. However, they have limited availability compared to other systems, and are more expensive to fit. 

The washdown flush system is common, with a straightforward design. When the flush lever is activated, water is released from the tank and flows into the bowl at a high velocity, effectively pushing waste through the trapway and into the sewer line. Unlike some other systems, washdown toilets rely on the momentum of the water rather than gravity to remove waste.

A washdown flush system is efficient, not particularly susceptible to clogs, and is a simple, fuss-free design. However, they can be noisy and may require more frequent cleaning. 

The toilet flush system ensures efficient waste disposal while promoting water conservation and hygiene. From traditional gravity flush systems to advanced touchless technology, there's a wide range of options to suit different preferences and requirements. 

For more help and support in choosing a flush system, or any other washroom needs, why not get in touch with our team?