Water tanks are devices storing harvested rain from roofs. Rainwater tanks are installed to make use of rain water for later use, reducing one’s reliance for mains water both for economic and environmental reasons but especially to aid self-sufficiency.
Rain is really distilled water precipitating after condensing at high altitude where temperatures are low. It matters not whether water falling from the sky is rain, hail, sleet or snow, it is all water and may be harvested.
Uses of Water Tanks
Stored rain water may be used for watering gardens, agriculture, flushing toilets, for washing machines, both laundry and dishwashing, washing cars, and also for drinking, especially when other water supplies are unavailable, expensive, or of poor quality, and that adequate care is taken that the water is not contaminated or the water is adequately filtered.