Compatible for The Heater Treater 20 Replacement Cartridge Compatible Replacement Filter for the Heater Treater 20 (FtHT-20-RevFlo-G).Recommended Replacement Interval of 12 months.Filters Sediment Down to 5 Micron.Ribbed Design Increases the Surface Area and Filter Capacity.Compatible to The Heater Treater 20 Replacement Cartridge by IPW Industries Inc.Compatible Replacement Filter for the Heater Treater 20 (FtHT-20-RevFlo-G). Recommended Replacement Interval of 12 months. Filters Sediment Down to 5 Micron. Ribbed Design Increases the Surface Area and Filter Capacity. Maintain the efficiency of your Heater Treater unit by replacing its filter every 12 months. FDA approved. Media is odorless, tasteless and colorless. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.