Derby Dual Flush uses less water than traditional toilets, which can save money on water bills and help to conserve water resources. The reduced flush option uses less water than a traditional toilet, which can help to reduce water bills. Dual flush toilets are more environmentally friendly than traditional toilets, as they use less water and help conserve natural resources. This Derby Dual Flush is also more environmentally friendly than traditional toilets that use the same amount of water for every flush.