Erie Water Treatment Controls, of Elk Grove Village, Ill., received certification of its rotary valve product line to WQA Gold Seal ANSI/NSF Standard 44 status for materials and structural integrity. The control valves under this certification include Series 2401—demand initiated regeneration, series 568—mechanical, and Series 2100—electro/mechanical. The WQA Gold Seal is awarded to products meeting the highest industry standards for residential and commercial water treatment systems. Erie, which includes an operation located in Olen, Belgium, is a business unit of Aquion Partners LP.