COMBO CARTRIDGE PACK: The Watts Premier OneFlow Plus Replacement Cartridge Combo Pack comes with one Radial Flow Carbon Block Cartridge and one TAC (Template-Assisted Crystallization Cartridge) for reducing chlorine taste and odors and converting hard minerals into soft particles, thereby preventing build-up inside pipes and retaining beneficial minerals like calcium, potassium, and magnesium. HIGH-PERFORMANCE FILTRATION AND SCALE REDUCTION: The high capacity 20-micron cartridge has a dirt holding capacity of up to 2.2 lbs. (1 kg) and removes chlorine taste and odor while reducing sediment. It provides chlorine reduction of up to 50,000 gallons (189,000 liters) at a 3 GPM (11.34 lpm) flow rate, while the TAC cartridge is designed to reduce scale formation. EFFICIENT FILTRATION: These cartridges do not add or remove anything from the water and operate without chemicals or salt, promoting sustainable water treatment and leaving only high-quality drinking water. FOR ONEFLOW PLUS: This cartridge is specifically designed for use with the Watts Premier OneFlow Plus Whole House system. We recommended replacing the carbon block cartridge every 50,000 gallons or 12 months and the TAC cartridge every 250,000 gallons o4 3 years. When replacing ensure to turn off the inlet and outlet valves on the system’s supply and outlet lines. THE PREMIER DIFFERENCE: Since our founding in 1989, Premier has been dedicated to the design, development, and marketing of high-quality water filtration systems that exceed industry standards. Following our Watts Water Technologies in 2001, our audience and influence have only expanded, solidifying Watts Premier as a trusted leader in the industry.