DSF change-over series inline-mounted pressure filter | Eaton
Pleatco Filter Cartridge for Dynamic Series IV, Model DSF, DFML-25C, Waterway PRB25SF-JH-PAIR - Walmart.com
Filter Cartridge for Dynamic Series IV, Model DSF 35, Waterway | Leslie's Pool Supplies
Amazon.com: Spa-Daddy SD-00200 Filter - Dynamic Series IV | Model DSF | DFML-25C | Waterway | Sold AS A Pair Replaces PRB25SF-PAIR : Patio, Lawn & Garden