Water Softener & Filtration DM Softener includes Watts W100 control valve, dual chamber Vortech tank and 18″ x 36″ brink tank. The combination of two technologies in one tank reduces costs, while still having the carbon and resin in separate chambers, ensuring proper contact time and no media migration. The carbon can be replaced without replacing the resin, and the system has a lower pressure drop than twin tank systems. Space saving design features Vortech tank technology for design features Vortech tank technology for higher backwash rates and float valve to prevent brine overflow. Visit here for more details: https://besthomewatertreatmentsystems.com/home-plumbing-concepts/our-products/water-softener-filtration/