The Drinkwell hy-drate Filtration System for Dogs is a healthy way to turn your dog's ordinary water bowl into an automatic water fountain. Designed to fit in your dog's favorite bowl it remains securely in place with small powerful suction cups. Fresh water continuously circulates through the hy-drate stimulating your cat's natural instinct to drink more. Small sediments like fur and food particles are trapped in the filter's mesh. Activated carbon filters the water to remove chlorine and odors for a cleaner better taste. Hy-drate is a fun affordable way to get your dog to drink more water to help improve their health! Features: Fresh filtered water in almost any pet water bowl Water movement increases your pet's natural instinct to drink more water Activated carbon filter removes chlorine odor and small particles Quiet submersible pump for continuous use Powerful mini suction cups keep it in place Meets UL73/CSA - C22.2 No. 68-92 safety standards Includes UL listed low-voltage Class 2 power supply Energy efficient the hy drate™ is powered by a quiet submersible pump with an adjustable flow control. The outer shells are detachable making it dishwasher safe. One activated charcoal filter is included. Three-pack replacement filters are available separately (PFD17-12905). It is recommended you replace the filter every two to four weeks.