WaterSense Meets EPA CriteriaCombining sleek lines with graceful curves, the Siderna collection offers a beautiful way to reduce water consumption. Like all Brizo bath faucets, the Siderna collection faucets deliver 1.5 gallons of water per minute, offering water-efficiency without minimizing performance. The Siderna collection is WaterSense labeled, certified by a third party to meet U.S. Environmental Protection Agency requirements.