Green Plumbing

Answer: D - Both laundry-to-landscape and branched drain systems are commonly used for capturing and delivering graywater to plants. Laundry-to-landscape is a simple system in which the drain hose for the washing machine is attached to a diverter that toggles graywater’s path between the graywater irrigation system and the sewer or septic system. Branched drain systems are more complicated to install, but last indefinitely. They involve a gravity-driven system that uses flow-splitting plumbing devices to create multiple increasingly-small water flows, each of which ends at the root zone of a large plant.