There are two common types of toilets on the market: Siphonic and Washdown toilets.

Many friends may not be clear about the differences between siphonic toilets and washdown toilets when choosing:

a. Which flushing system is better?Siphonic or Washdown.

b. Whether the flushing force is large or not?

c. Whether the flushing is clean or not?

In fact, both flushing systems have their own advantages and disadvantages. Which one you choose depends on your specific needs and preferences.

Below, we will discuss in detail the flushing methods of Siphonic and Washdown toilets and what to pay attention to when purchasing.

1、 Flushing method

The flushing methods of toilets are mainly divided into two types: Siphonic and Washdown Toilet flushing.

a). Washdown toilet type

Advantages:

a. The design slope is large.

b. The flushing path is short.

c. The principle of height difference and gravity acceleration is used to achieve concentrated water flow and strong flushing.

d. Easier to clean and maintain due to a simpler design.

Disadvantages:

a. It consumes a lot of water and has a loud flushing sound, which is noticeable when using the toilet at night.

b. The water storage area is small, and the odor prevention effect is not as good as the siphon type.

b). Siphonic toilet type

The slope of the siphon type pool wall is relatively gentle, and the water flows out along the pool wall, creating suction in the water pipe to remove dirt.

a. Compared to the washdown flush type, it saves water and is silent.

b. The pool has a large water area, which can effectively prevent insects, backflow, and odor from rising.Efficient waste removal and cleaning of the bowl.

c. Typically more powerful flush, which may be better at preventing clogs.

d. Better at minimizing odors and reducing the need for frequent cleaning.

Summarize it on a table for easy visualization of the difference between direct and siphon types.

According to different outlet designs, the siphon type can also be divided into two types:

Jet siphon and vortex siphon.

a).Jet siphon toilet

Add a spray secondary channel at the bottom of the toilet, align it with the center of the sewage outlet, and have 360 ° circular distribution of water outlets on the inner wall.

When flushing, a portion of the water flows straight down from the outlet hole, similar to a waterfall effect;

The other part of the water is sprayed out from the nozzle, and on the basis of siphoning, it quickly washes away the dirt with the help of a larger water flow impulse.

The flushing sound is low, but it consumes more water.

b).Vortex siphon toilet

The flushing port is located on the bottom side of the toilet, with two symmetrical spray ports designed on the inner wall.

When flushing, the water flow forms a vortex along the pool wall, increasing the flushing force on the pool wall and increasing the suction force,

which is more conducive to flushing away the dirt adhering to the surface of the toilet and making flushing silent.

2、 Sewage pipe

There are two different flushing methods, Washdown and siphon flushing, and the corresponding sewage pipes are also different.

Washdown flushing sewage pipe: V-shaped structure, no return water bend, thick pipe diameter (usually 9 to 10 centimeters in diameter), small arc, and short path.

Siphon sewage pipe: an “S” shaped structure that forms a water seal by utilizing the height difference between the water levels on both sides. The pipe has a smaller diameter and a larger curvature.

In addition to the choice of flushing method, there is another key point to ensure smooth drainage of the toilet:Glaze the entire pipeline.

The entire pipeline glaze treatment of the sewage pipe can reduce the friction between the dirt and the pipe wall, reduce the probability of fouling, and greatly improve the sewage discharge capacity.

Full pipeline glazing requires high technical requirements. Some small manufacturers claim that the sewage pipes are fully glazed, but in reality, they only blow the glaze into the pipeline. The real full pipeline adopts immersion glaze technology, allowing the glaze to fully adhere to the pipeline. Only large manufacturers have mature processes.

Due to the glaze applied to the inner wall of the sewage pipe, it cannot be visually distinguished. When choosing, you can reach into the sewage pipe and touch the inner wall to see if it is smooth. If conditions permit, merchants can display a cross-sectional view of the toilet to see if the deepest part of the sewage pipeline is glazed.

The national standard GB6952-2005 has 13 inspection and testing standards for the flushing function of the toilet, such as testing the cleaning function through the “ink line test”; Testing the solid discharge function of the toilet through “minimum solid ball test”, “ball discharge test”, “particle discharge test”, and testing the transportation characteristics of the drainage pipeline through “ball impact distance test”.

3.Siphonic vs Washdown Toilet. Which Flushing System Is Better?

The “better” flushing system depends on your priorities. If you are concerned about water conservation, a washdown toilet might be more suitable. They tend to use less water and are quieter. However, they may be less effective in removing waste, especially larger solid objects, and could require more cleaning.

On the other hand, if you prioritize powerful waste removal and reducing the likelihood of clogs, a siphonic toilet may be the better choice. They tend to be more efficient in this regard but can be noisier and use more water.

Ultimately, the choice between siphonic and washdown toilets comes down to personal preferences, local water regulations, and the specific requirements of the bathroom where you plan to install the toilet. It’s essential to consider your priorities, as well as factors like water efficiency, maintenance, and noise levels when making your decision.

That’s all for introducing the relevant knowledge about the difference between Siphonic vs Washdown Toilet, hoping to be helpful to everyone. For more relevant knowledge, please visit our LORY official website.