Future aircraft lavatories will significantly reduce potable water consumption and CO2 emissions. The ECO Grey Water Reuse System collects hand wash water for toilet flushing, saving up to 25% of potable water—about 250 liters per Boeing 787 flight. This weight reduction can cut CO2 emissions by up to 90 tons annually, lowering operating costs. Diehl Aviation's design ensures hygiene, safety, and reliability, with the system weighing less than 3 kg per lavatory
