The 128 oz. Drinkwell® Zen Pet Fountain is designed for cats and dogs of all sizes, and the stainless steel bowl provides a large drinking area for multiple thirsty pets at once. This BPA-free fountain contains a 3-layer activated carbon filter to remove bad tastes and odors for your dog and cat. The wide free-falling stream aerates your furry friend’s water for freshness while constantly circulating to help prevent bacteria growth. For quiet operation, the pump is submerged, and the receiving ramp reduces the sound and splash of falling water. Simply disassemble the pump to hand wash and place all other parts on the top rack of your dishwasher. PetSafe® brand is here to help you and your pet live happy together™.