Create a simple gray-water system for household sinks
An incredible amount of reusable water is wasted every day in the average household. A simple gray-water system for the kitchen sink would be ideal for the average family to use. A simple button or valve could switch the water from going into the sewer to an on-site collection tank instead. The gray-water could then be used to water the lawn, plants, garden, etc. instead of using freshwater from the hose or faucet.