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Side-by-side comparison of what a water softener removes versus what a water filter removes Water Softener vs. Water Filter: Which Do You Need? A softener removes hardness minerals; a filter removes chlorine, sediment and chemicals. Here's how to tell which one your home… Diagram of an under-sink reverse osmosis system with sediment, carbon and membrane stages and a storage tank Best Reverse Osmosis Systems of 2026 We compared under-sink, tankless and countertop reverse osmosis systems by certification, output, wastewater and yearly filter cost. Here are the… Diagram of a three-stage whole-house water filter with sediment, carbon and polishing stages The Best Whole-House Water Filters of 2026 We compared whole-house water filters by the numbers: real NSF/ANSI certifications, capacity, flow rate, filter costs and price. Here are… Bar chart of water softener costs for the unit, installation, salt and upkeep How Much Does a Water Softener Cost? A water softener costs about $580 to $1,750 for the unit, $150 to $1,000 to install and roughly $200 a… Diagram of a water softener resin tank and brine tank with the title Best Water Softeners The Best Water Softeners of 2026, Compared by the Numbers We compared current water softeners on capacity, certification, salt efficiency, warranty and price. Here are seven picks, from a $580…