The FI-IRON20-BB cartridge is designed to provide an easy and effective method of reducing iron in water, which greatly improves the taste and look of your water. This cartridge helps to eliminate the orange and brown stains often found in sinks, toilets, tubs, and other plumbing fixtures. Well water homes usually have the most iron stain problems. The FI-IRON20-BB reduces the possibility of damage to pipes and water heaters and reduces up to 3 ppm dissolved iron. It adds no harmful chemicals to the water, making it completely safe for drinking water applications. This cartridge should be installed on the main cold water line after the pressure tank or water meter. For best results, pre-sediment and post-carbon treatment is recommended. Reduces iron & orange rust stains in sinks, showers & toilets throughout the entire home Effective treats up to 3ppm iron in water to eliminate metallic taste and odours Protects pipes, plumbing, appliances and clothing from iron fouling, clogs & stains Super high-capacity cartridge treats up to 160, 000 gallons of water Fits in all Standard 20 BB water filter housings.