Bore well water passes through the IRF filter from the Raw Water Storage Tank. The IRF Filter removes Iron. Structural Design: Manufactured with FRP/SS outer casing to provide structure, strength and longevity of 20-30 years. Internally lined with acid resistance fiber re-enforced plastic (FRP) / Epoxy. All valves used in the system of International Standard. British Iron Removal Media (Mn O2) used to remove the Iron.