The Drinkwell Outdoor Dog Fountain is the largest capacity fountain on the market, made with high-impact UV resistant plastic for placement inside the home or out. Dual reservoirs keep it filled longer and make refills simple. Features two methods of filtration, a large foam filter catches big particles and debris before they clog the pump. The 3-layer carbon filter removes smaller particles and enhances the freshness of the water by removing bad tastes and odors. The free-falling stream entices pets to drink more water and the current in the bowl helps move the debris towards the filters, providing the best hydration solution for your dogs!