the water in the concrete tank is pumped up to the
header tank on top of a wooden tower
reaching to the solar room. From there it flows to the water tanks in
the solar room. Cool water is also pumped up and supplied to the
faucets. It is important to be aware how much water can be used
depending on rainfall.
An average household in a Japanese large city uses more than can be
stored even during heavy rainfall. During a shower, hot water runs even
when we soap ourselves. Therefore, making an on-off switch for
showering would help to conserve water and energy. To reduce the amount
of water used in toilet flushing as well as using less than 35 liters
of water per shower would mean that the water necessary per person per
day would amount to approx. 170ltrs. Saving water is very essential to
a sustainable lifestyle.
There is a lot of rainfall in N.Z. A rain water force generator could change a disadvantage into an advantage. When 2 tonnes of rain water drop down from a 6m hillock, we can use the potential energy to run a 1kw heater for 140 seconds.