Radio Systems RS-PAC00-13067-4 Drinkwell Original Filters, 12-Pack

The new Drinkwell Original 12 (4 - 3 Packs) Pet Filters should be changes every 4-8 weeks depending on the size and number of pets using the fountain. 12 filters should be a 2 year supply The filters packaging comes with detailed directions and diagrams on how to remove and install the filters in your Drinkwell Pet Fountain.