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The Gain Rain® fits inside a 3" downpipe to create a diversion damn for directing water away from downspouts that don't connect to a rain harvesting system. It helps the system collect more water from the roof to which it is connected.


  • Simple alternative to plumbing downpipes to your rainwater tank

  • Quick and easy to install – simple DIY product

  • Ideal for use with rainwater tanks and rainwater diverters

  • Safety overflow – to protect gutters from overflowing

  • Anti-pooling feature – no risk of mosquitos breeding

  • Anti-drop feature – no risk of Gain Rain® falling into downpipe

  • Twin pack