The Drinkwell Big Dog Fountain holds 2.25 gallons of water and continuously circulates and filters your pets' water, keeping it cleaner and fresher than a normal water bowl. Say goodbye to constantly refilling your dog's water, the large capacity will bring peace of mind, knowing their pet has a good supply of water. A patented free-falling stream aerates the water for added freshness and encourages pets to drink more water, providing a better hydration solution for your pets. The deep bowl design with its high walls control splashing and spills. The replaceable charcoal filter keeps water clean and the anti-bite cord cover keeps pets safe. Fountain is dishwasher safe (excluding pump) and is BPA Free.