Greywater Proposal Most greywater systems are abandoned after a short time because of expense and hassle. The branched-drain greywater system is a great way to let your wastewater go gently back to the Earth if you’re building a green home. Request this Download Enter your contact information to request the free download. You will receive an email with a link to download the file. Subscribe to the Energy Vanguard Newsletter Share This Tweet Share Share Email