In this Video clip, it is all about Rain Water Harvesting. This house is using Rain water for toilets, showers, DRINKING Water and Their pool. The house uses a whole house cistern and utilizes a clean metal roof. The Tank town has setup a expeirment to show homeowners that they coul still collect water off of a old rusty roof that is covered in leaves. They use a purification systems tha collects the first flush in a seperate tank that they then use for irrigation. The purification process is completely chemical free, where they use ultra violet sanitizer that cost $75 and lasts 10,000 hours and once that bulb runs out then the water is undrinkable until it is replaced. Great way to use what mother nature gives to us for free.