Rain chains are alternatives to a downspout. Their purpose is largely decorative, to make a water feature out of the transport of rainwater from the guttering downwards to a drain or to a storage container.
Rain chains are typically either a series of metal cups, chained together with a hole in the bottom of each, or chain links that span vertically. Rain water run-off gets distributed from a rooftop gutter downward through the rain chain.
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