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Designed with a stainless steel body and smaller footprint, the Zurn 400ST Stainless Steel n-Pattern Backflow Preventer Series withstands the corrosive effects of water and allows for direct drop-in replacement – delivering convenience without compromise. The series has intelligent features to eliminate job site parts, labor and costs, and users can choose from a variety of series models and sizes. Replacements do not require re-piping or additional materials.
The series has earned approval by the USC Foundation for Cross Connection Control and Hydraulic Research across all sizes (4-inch to 10-inch) and assembly types (RP, DC, RPDA, DCDA). The backflow preventer series has been undergoing USC field evaluation since its ASSE launch in October 2017. The USC Foundation is the only agency that requires a one-year field evaluation before an assembly is listed or approved. In addition to the USC Foundation approval, the series is FM and ASSE approved, IAPMO listed, CSA certified, UL and C-UL classified. It meets the requirements of NSF/ANSI 61.