VOX Design Group, Inc.

Consider using rain barrels or better yet a large underground storage system to harvest the rainwater from your roof. An inch of rainfall on 1,000 square foot roof will produce 623 gallons of water. You can use a pump system to supply the toilets. You can also set the irrigation system to utilize the rainwater. Most homes today let the rainwater drain off into the storm drains or even into the sewer systems putting a burden on our systems.