The Catit Drinking Fountain Constantly circulates 3 lt of water through its filter to ensure that the water is pure and fresh. The large surface area ensures that the optimum amount of oxygen is added to the water but consuming less than 4 Watts it is also very economical to run. Encouraging your pet to drink more water helps promote health and well-being. The Catit® Drinking Fountain responds to your pet's need for a continuous supply of water. Many cats do not like the "chemical" smell of tap-water, a better solution is a drinking fountain where these smells are dissipated quickly and constantly filtered preventing stagnation. Re-circulating water with greater exposure to oxygen provides fresh-tasting, cool, filtered water for pets with a multitude of health benefits including the reduction of crystal formation and urinary disease (FUS).