The Vevor whole house water filter replacement cartridge is designed to reduce scale buildup by removing calcium and magnesium ions from household water. Its polyphosphate filtration media helps soften water while protecting plumbing, heating equipment, and appliances from corrosion and mineral deposits. The standard 4.5" x 20" size fits most compatible whole house filter housings for easy replacement. With a capacity of up to 100,000 gallons and an expected lifespan of up to 1 year depending on water quality, it offers long-lasting whole-home water treatment.