Numerous types of rainwater harvesting systems exist for the gathering and storage of rainwater. Their benefits can include:

• Planning applications with rainwater harvesting are favoured
• Enables increase in Code Level, for both private and sociable housing, if constructing to ‘The Code for Sustainable Homes’
• Full or partial replacement of the main water supply within a building
• Potentially supplying the likes of residential & domestic fire sprinkler systems
• In flood-prone areas, rainwater storage can alleviate storm-water runoff
• Where attenuation tanks are a pre-requisite, these may be replaced by an adequately sized rainwater storage tank
• Substantial cost savings in water supply and sewerage charges from the Water Company
• Businesses can offset the installation cost of rainwater harvesting against tax