Express Water – Iron & Manganese Replacement Filter – Whole House Iron & Manganese Replacement Water Filter – IRN Zeomangan High Capacity Water Filter – 4.5” x 20” inchOur efficient high capacity IRN filter improves the purity and taste of your water and gives you the best value from your filters. Standard 20 size fits most whole house filters, high capacity systems, and Purifiers. Save your time and money with a high capacity filter. The life of your filter will depend on the quality of your water. On average each filter is good for up to 100,000 gallons or 6 12 months of use. Our high flow design can supply up to