Compatible with Drinkwell Lotus Avalon and Pagoda Pet Water Fountains. Extend the life and flow rate of the filter pump. Provide cleaner and healthier water for your pets. Please replace the foam pre-filter and carbon filter every 2-4 weeks depending on usage. "Replacement Cat Water Fountain Filter for use with PetSafe Drinkwell Avalon Pagoda Seascape Sedona." This replacement cat water fountain filter is not sold or manufactured by Petsafe Drinkwell Avalon Pagoda Seascape Sedona. For any reason, you are not completely satisfied with these filters. Please contact us for a replacement or a full refund.