The lead free* Apollo® Model 161T-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 construction. Renewable bronze seat disc. 100% factory tested per MSS SP-139. Cast, machined and assembled in the USA, ARRA Compliant.