This replacement filter housing holds the Drinkwell® Activated Carbon Replacement Filters (PAC00-13906). The filter housing is compatible with the Drinkwell® Avalon, Pagoda, Sedona, 1/2 Gallon and 1 Gallon Pet Fountains. Features * Replacement - Use the Drinkwell® Replacement Filter Housing a spare for your compatible pet fountain * Compatibility - Replacement Filter Housing is compatible with Drinkwell® Avalon, Pagoda, Sedona, 1/2 Gallon and 1 Gallon Pet Fountains In 1998, we founded PetSafe based on a simple truth: safe and healthy pets make for happy pets and happy pet families. Ever since, weâ??ve been growing and innovating non-stop to deliver life-changing products and experiences to a global community of pet parents. Our products bring a lifetime of joy to pets and the people who love them.â??