www.supplyht.com/articles/84611-approved-br-grundfos-pumps-corp-s-comfort-series-instant-hot-water-recirculation-system
Approved ...
Grundfos Pumps Corp.'s Comfort Series Instant Hot Water Recirculation System
July 1, 2003
Grundfos Pumps Corp.'s Comfort Series Instant Hot Water Recirculation System received ANSI / NSF Standard 61 and International Association of Plumbing and Mechanical Officials (IAPMO) safety certifications. The ANSI / NSF Standard 61 establishes guidelines for determining whether contaminants or other impurities are imparted indirectly into drinking water from the product being tested.
