Quick view Fernco PVC 21" x 21" Flexible Coupling (Clay x Clay) Compare $584.66 Joins two pieces of pipe Coupling 25.40" x 25.40" 5/16" Nut Tighten to 60 lbs. torque Drainage applications ONLY Fernco 21" Clay x 21" Clay Flexible Coupling Data Sheet Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List