Instead of using water pipes, a chain is used to drain water. This drainage device, currently popular in Japan and South America, is called the Rain Chain System. But why choose a chain instead of a typical pipe? Chains are actually chosen because they are easier to install and maintain, and are more resistant to blockages. However, there is still a risk of blockage at the top drain hole of the chain. So the main function of the rain chain is to direct the flow of water from the roof of the building so that it is more controlled towards the disposal site.

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