Rainwater harvesting is a technique used for collecting, storing and using rainwater for landscape irrigation and other uses. The rain water is collected from various hard surfaces such as rooftops and other man-made above the ground hard surfaces. It is now viable to harvest rainwater for your whole household. This includes rainwater harvesting, storing and pumping rainwater for bathing, showering, toilet flushing, pool, laundry and irrigation. Rainwater harvesting can help you save up to 90% of your water bill. Simply by collecting and using water harvested during the rain season and using this water in your whole household, the tank surges full very rapidly, but you draw water from the system every time you open a tap, flush the toilet, or use the washing machine, or any other use of water.