FOR many households a water tank is not an option due to its size and appearance. An alternative is harvesting grey water.
This compact (1/3m2), semi-automatic system, available from Plastic Plumbing Supplies , works by collecting water from a household's shower, bath, and washing machine.
The pump is activated at a set level and the water is sent to where it's needed. If the system is not used in 24 hours, it empties in accord with EPA guidelines.
A family of four can save up to 700 litres a day for garden use. A consumer bonus is that this system is up to 2/3 cheaper than comparable units.