Overflows or discharge pipes from roof-mounted appliances such as air-conditioners or hot-water systems should not have their discharge feed into a rainwater tank.

The building was galvanized, with timber supports and a timber floor, while the showers were cold and were supplied by a large rainwater tank on the roof.

While restoring the main house, the workmen came across the original underground rainwater tanks, still in working order.

In the 'utility' room are two 5,000-litre rainwater tanks which collect and store water for flushing the lavatories and watering the garden.

Rainwater tanks may have a high (perceived) initial cost.