The secret to a green garden… Waterwise Systems®' patented Greywater Gardener 230TM is a gravity irrigation system that reuses the water from your washing machine and bathroom to maintain a healthy garden without tap water. The system is suitable for both new and established gardens. The Greywater Gardener 230TM is a unique, safe greywater reuse system that waters every plant in your garden each time a load of washing is done. In larger gardens the system can also be used with shower and bath water.