There are two types of flushing systems that are commonly used, washdown and siphonic.
In a washdown system, water is immediately sucked down immediately after the flushing button is pressed. Usually followed by a little noise when the water is sucked down. The washdown toilet has a small water surface area in the bowl that is located deep inside. This toilet also has not too wide size and is suitable for those of you who are dynamic and like the minimalist concept.
The way it works in the siphonic system, first the water rotates in a spiral shape in the toilet bowl, before finally entering the drain. It is almost noiseless. For those who are concerned with comfort and often wake up at night and don’t want to disturb other family members, a siphonic toilet would be the right choice.