EC Series filters are manufactured entirely from NSF 42 Tested and Certified Materials making them an ideal choice for a wide range of residential, food service, commercial and industrial applications. This cartridge is Gold Seal Certified for material safety and an ISO 9001:2030 standard 2.5” verified. The Puretec EC Series filters can be used with many liquids and are very effective for Chlorine, odor and taste removal. Cyst, lead, heavy metals, high turbidity and sulfur removal models are also available