CERTIFIED FIT: The only filter brand certified to fit PetSafe Drinkwell Outdoor Dog and Overflow Pet Fountains FRESH WATER: Activated carbon water filter refreshes the water and the foam filter catches hair and debris 50% MORE CARBON: PetSafe Drinkwell branded filters contain 50% more carbon than generic brands for better and longer-lasting filtration U.S.-BASED CUSTOMER CARE: Our pet product experts are here to help you and your pet and are available by phone, email or chat if you have any questions ESTABLISHED EXPERIENCE: PetSafe brand has been a trusted global leader in pet behavior, containment and lifestyle innovations for nearly 30 years. We help pets and their people LIVE HAPPY TOGETHER