Seismic Flex Coupling™

Whether it’s ground displacement, liquefaction, strain along a fault line or structure, McWane Ductile’s Seismic Flex Coupling™ provides a reliable, economical solution. With its time-proven TR Flex® joint design, it maintains the high pull-out strength required in seismic activity areas even when fully extended. Made of Ductile iron, the coupling has a working pressure rating of 350 psi for 4-inch through 24-inch and 250 psi for 30-inch through 36-inch. This product conforms to all requirements of AWWA C153.