Abstract: The Rainbank is a rain distribution system that provides a cost-effective alternative to the collection and distribution of rainwater for municipalities. The Rainbank includes temporary storage capacity using a disposable flexible bag acting as a container to capture and collect rainwater and alleviate burdens on municipal water treatment works. The bag is protected in a simple, easy-to-manufacture, foldable structure. The structure allows for a distant overflow feature, a locking mechanism, filters, debris protection, and easy access to and removal of the bag. A thick, rigid backboard can also be slid into the bag to alleviate strain on the support structure. The fixed structure also can be closed between use periods to protect the system, help reduce the impact of the system on the environment, and allow the surface area grass below the support structure to regenerate.