The Apollo™ Model 169T (61Y-75x Series) Class 300 Swing Check provides a cost effective Made in the USA alternative to globally sourced check valves. These valves are cast, machined, assembled, and tested in South Carolina. Apollo™ swing checks with PTFE seats are ideal for liquid service and can reliably be installed in most plumbing and heating systems including building service piping and OEM applications. The Apollo™ swing check may be installed in either a horizontal or vertical lines with upward flow.