The Water Softener Filter Cartridge replaces calcium and magnesium ions with sodium ions as the water passes through the filter. This “softens” the water. This process actually changes the texture of the water, making it feel slippery. When you wash your vehicle, your favorite car shampoo will lather better and the rinse water will sheet off your vehicle, leaving no water spots. The contents of the water softener cartridge can become "full" of calcium and magnesium. When this happens, you can refill the cartridge with the Water Softener Resin Refill. The new resin will function like an entirely new cartridge!
