Developed by a Veterinarian, the Drinkwell Big Dog Pet Fountain provides 288 oz (2.25 gal) of fresh, filtered water to your pet. A patented free-falling stream of water entices your pet to drink more and continually aerates the water with healthful oxygen. A charcoal filter removes bad tastes and odors, giving your pet the best way to stay hydrated! This model features a 5-inch deep bowl to help prevent spills and a 1-gallon reservoir to increase capacity and make refills easy. Replaces SKU DOGC-RE.