look what i found click this site PHSI Pure Water Technology products conform to the highest industry standards for integrity and consumer safety. Our certified drinking water treatment units have not only met the standards for reduction of specific health-related contaminants in drinking water, but in addition, the materials and components used meet rigorous safety and structural integrity and strength requirements set by North American and European industry standards organizations.
A Mark of Product Quality
“To help consumers choose quality water treatment products, WQA developed its Gold Seal Certification Program—issuing the first Gold Seal in 1959.”
“WQA only awards the Gold Seal to those systems, components, or additives that have met or exceeded industry standards for contaminant reduction, structural integrity, and material safety. Customers can easily identify WQA Certified products by looking for the Gold Seal Mark.”