CERTIFIED FIT: The only filter brand certified to fit the PetSafe Drinkwell 1/2 Gallon, 1 Gallon, 2 Gallon, Butterfly, Avalon, Pagoda, Seascape, Sedona, Seaside and Creekside Pet Fountains FRESH, FILTERED WATER: The replaceable carbon keeps your pets water clean by refreshing the water BETTER VALUE: PetSafe brand filters contain 50% more carbon than generic brands for superior and longer-lasting filtration EASY TO REPLACE: Simply replace the carbon filter when you clean your pets fountain; each filter provides 2-4 weeks of 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