Proflex 4 In. x 4 In. PVC Shielded Coupling - Cast-Iron to Plastic, Steel, Extra-Heavy Cast Iron

Provides a connection between cast-iron pipe and plastic, steel, or extra-heavy cast iron pipe without the use of bushings. The internal pipe stop insures proper installation and reduces noise and vibration. The outer shear ring and clamp assemblies conform to ASTMA A167-91.