The lead free* Apollo® Model 161S-LF (61YLF Series) Swing Check provides a reliable, long lasting, “Made in the USA” alternative to globally sourced check valves for potable water service. These valves are cast, machined, assembled, and tested in South Carolina using proven ASTM quality materials. The Apollo® swing check may be installed in either horizontal or vertical orientation with upward flow.Dezincification Resistant Bronze Body ConstructionRenewable Bronze Seat Disc100% Factory Tested per MSS SP-139Cast, Machined and Assembled in the USAARRA Compliant