Do I need a water softener or whole-house filter?

A softener and a filter solve different water problems, so neither should be the automatic first purchase. Softeners address hardness minerals that cause scale, while filters must be selected for specific particles, tastes or contaminants. The right choice starts with knowing whether your home uses city water or a private well and what a credible water test actually found. Ask which problem you want to solve: spots on fixtures, scaling inside equipment or concerns about drinking-water quality. Choose treatment certified for the identified need, and plan for maintenance. A plumber can check whether the proposed equipment and piping setup fit your home.