iSpring Case Study: Solving Severe Iron and Manganese Issues in Well Water with the WCFM400K Water Filter by iSpring Water SystemsUpdated on Sep 27, 2026 Table of Contents Shop Items from the Article iSpring WCFM400K Regular price $1,417.99 Sale price $1,417.99 Regular price $1,417.99 Unit price / per iSpring WCFM500K Regular price $2,308.99 Sale price $2,308.99 Regular price $2,308.99 Unit price / per