This system reuses your shower, laundry and wash basin water to irrigate your garden and lawn. By running a separate drain pipe from your toilet and kitchen to sewer, your greywater is directed to a pump and filter system. The pump pressurises the irrigation system which is how the water is effecively spread throughout your garden.
Grey water systems have a self-rinsing process that reduces the need to clean filters, which means less services for you.
Earth & Water offer a water saving calculator so you can infill your own figures and see what you save!