After several decades an urban gardener who had used only the natural cycle of nature to water his plants decided to extend his growing season by using rainwater. Two tanks were installed. The 650 gallon tank collects approximately 400 gallons of water per 1 inch of rain from the roof and then pumps it to a 2500 gallon tank over 200 feet behind the house, across the alley and next to the shed. The large tank uses gravity to water the 1800 square foot garden. The system delivers approximately 3000 gallons of water for the garden. The pump also pressurizes water for the smaller tank near the house for other out door water use.
Tanks are buried 2 feet underground to prevent pipes from freezing.