You can water the garden every time you have a shower, do the laundry, wash the dishes or brush your teeth. Reuse all or just part of your greywater to keep your garden alive during the drought and ongoing water restrictions.
The ECO Design Greywater Recycling System (GRS) is a low cost and low maintenance greywater treatment and distribution system for irrigating the vegetation in your garden.
The GRS can be installed to reuse the water from just the bathroom or from the bathroom and the laundry (where most of the water is used) or the entire greywater output from your house.
http://www.greywater.com.au/greywater.html