RAIN HARVESTING - Who are we and what do we do? RAIN HARVESTING is a market leading Australian company, specializing in products that harvest rain water. Rainwater harvesting involves the collection and storage of rainwat......RAIN HARVESTING - Who are we and what do we do? RAIN HARVESTING is a market leading Australian company, specializing in products that harvest rain water. Rainwater harvesting involves the collection and storage of rainwater run-off from your roof, which can then be used inside and outside your home or business. Its a simple concept with effective results. At RAIN HARVESTING, we design, manufacture and wholesale a high quality range of sustainable water products for both the Australian and USA Markets. As the driest continent, Australia has long recognized rainwater harvesting as a critical to our survival. RAIN HARVESTING has led the revolution in Australias sustainable water industry and is a leader in innovation and new product developement.