Rain chains (Japanese: 鎖樋, kusari-toi or kusari-doi, literally "chain-gutter") are alternatives to a downspout. They are widely used in Japan. 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. (Rainwater is sometimes collected for household usage.) They can also be found on temples.
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.
- See rendaku for why multiple pronunciations.
- Nigel Dunnett and Andy Clayden (2007). Rain Gardens. Timber Press. pp. 85–87. ISBN 9780881928266.
- Barbara Pleasant (2006). "Make a Rain Chain". Easy Garden Projects to Make, Build, and Grow. Rodale. p. 147. ISBN 9780899093994.
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