Release Date: December 20, 2018

Zurn Wilkins® Backflow Preventer Earns USC Approval

MILWAUKEE, WI – Zurn Water, LLC announces the 400ST Stainless Steel n-Pattern Series has earned approval by the USC Foundation for Cross Connection Control and Hydraulic Research across all sizes (4” to 10”) 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.

“With its stainless-steel body and smaller footprint, the 400ST Stainless Steel n-Pattern Series withstands the corrosive effects of water and allows for direct drop-in replacements – making it a reliable solution for building owners and easy to install for contractors,” said John Mankins, Product Manager for Water Safety at Zurn. “Replacements do not require re-piping or additional materials. The 400ST is available with an optional patented AR spool for replacements of the Zurn Wilkins 400 Ductile Iron n-Pattern Series and uses the same proven internal components as the 300 and 400 Ductile Iron n-Pattern Series.”.

In addition to the USC Foundation approval, the 400ST Stainless Steel n-Pattern Series is FM and ASSE® approved, IAPMO® listed, CSA® certified, UL and C-UL classified. It meets the requirements of NSF/ANSI 61.

For more information, visit or watch the video on Zurn’s YouTube channel.

Leslie McGowan
Marketing Communications