Cat Fountain Filter Finder

Find replacement filters for cat water fountains sold in the US. This guide was researched and compiled from manufacturer product pages, care instructions and current retailer listings, checked October 31, 2026. It compares model compatibility, cartridge counts, included sponges and one-time pack prices. Start with the model printed on your fountain, then open its matching product listing. Prices exclude shipping and tax and can change. Products are grouped by compatible fountain family; their order is a navigation aid, not a filtration-performance ranking.