Lancaster's Proprietary X-Factor Series delivers solutions through advanced state-of-the-art technology to effectively treat your most challenging softening needs including ferrous and ferric iron depending on the model you chose. Lancaster's exclusive X-Factor Series includes the Lancaster Diamond, Platinum and Gold Lines for a Family of solutions that will always provide you with the ultimate piece of mind. Our innovative X-Factor Series control valve is easy to program and provides valuable intuitive information, including usage history, diagnostic records, and current gallon-per-minute flow and usage to the installer and homeowner.