The Drinkwell Big-Dog Fountain uses the same innovative watering system as the Original Pet Fountain, featuring the patented free-falling stream of water that consumers have come to rely on for cats and small dogs for the past decade. A large charcoal filter removes bad tastes and odors leaving your pet with fresh tasting, filtered water. Designed by a veterinarian specifically for large dogs, the Drinkwell Big-Dog holds well over two gallons of water (288 oz). The Drinkwell Big-Dog is the most convenient way to provide man’s best friend with fresh filtered water for days at a time. Proven to benefit your pet’s health, the Drinkwell Pet Fountains are a great way to show your pets just how much you care. Our research shows that one of the best ways to improve your pet’s health, is to get them to drink more water and the best way to do that is with the Drinkwell Pet Fountain! By using a 5-inch falling stream of water, the fountain continually aerates your pet’s water with healthful oxygen. A charcoal filter removes bad tastes and odors, giving your pet the best possible and most appealing way to stay hydrated! Water capacity: 5 litres Dishwasher safePre-filter catches hair and other large particles before they reach the motor Patented free-falling water stream entices pets to drink more water Receiving ramp reduces splash of falling water Adjustable flow controlLow-voltage, 12 V system Submersible pump for nearly silent operationSnap-on lid to prevent accidental removal Rubber feet to prevent sliding Replaceable charcoal filter removes bad tastes and odours.