The Aqualife #401 Super cartridge was the first product that established the Aqualife Corporate benchmark for standards of excellence in our range of water treatment products. This 20 year plus favourite with our customers offers 0.5m absolute carbon filtration that combines an iron exchange resin to reduce lead content. This cartridge has been manufactured using FDA compliant materials and is independently tested based on NSF/ANSI material requirements standards 42, 53 and 58.