PetSafe Current Pet Fountain Carbon Filters 4 Pack The PetSafe Current Pet Fountain Carbon Filters are made for the PetSafe Current Fountains. These replacement filters will keep your pet's water tasting clean and fresh. Filters help extend the life of your fountain and pump and should be replaced every 2 to 4 weeks. Features: Compatible with PetSafe Current Pet Fountains Item Specifications: Includes: 4 Filters Model Numbers: PAC00-15271 PAC00-15271 729849152717