ActiveWater - 3.5 Star WELS and 3 Star Energy. ActiveWater™ is a revolutionary dishwashing system that uses every single drop of water to the maximum. Our ActiveWater™ dishwashers are amongst the most resource-efficient in the world, generating the cleaning power of over 4,000 litres from as little as 12.3 litres per wash. No single appliance leaves our factory until it has been proven to meet our high standards of quality, performance and sustainability. All Bosch ActiveWater™ dishwashers undergo 200 individual quality control checks before being released from the factory.