Which type of water closet is known for being the least expensive and most prone to noise?

The siphon washdown water closet is typically recognized as the least expensive option among various types of toilets. This design utilizes a simple mechanism that relies on gravity to facilitate flushing, which helps keep production costs lower compared to more complex systems.

Additionally, siphon washdown toilets are often prone to producing more noise during operation. The flushing process in these toilets can create a louder sound as water rushes into the bowl, leading to a more noticeable sound experience in the bathroom compared to other types like siphon jet or siphon vortex models, which are designed with more sophisticated mechanisms to manage sound and flushing efficiency.

The combination of affordability and noise susceptibility makes the siphon washdown a common choice in many installations, particularly in situations where budget constraints are a significant factor. This is important for understanding the trade-offs that come with different toilet designs regarding cost and user experience.