Interesting article - taken from CMHC website
Rainwater harvesting — collecting and storing rain for later use — is an ancient practice. It is still used in many rural places throughout the world, and today it is making a comeback in urban centres as an additional source of water.
At its simplest, rainwater harvesting consists of a rain barrel placed under the downspout of your home to collect rainwater for garden irrigation.
Larger, more sophisticated, systems can be incorporated into your home’s plumbing system to provide water for a variety of household needs, from toilet flushing to laundry, and even drinking water (in these instances the rainwater will be treated prior to use).
All rainwater harvesting systems, simple or complex, have the same basic components:
- A catchment area to capture the rainfall — this is typically the roof of the house.
- A conveyance system to move the water from the roof to a storage area — eavestroughs and downspouts, and maybe piping.
- A storage system to hold the rainwater for future use — a barrel, a cistern or a tank.
- A distribution system to get the water from storage to where it is being used — this can range from a watering can to full integration with the existing plumbing system in the house.
I am partial to this kind of system as my personal home collects water from all areas of our roof and deposits it into a large cistern under our garage. We use these 6000g to bath, do our wash, water the flower ect. not only is it free but a great way to respect our Earth