PVC Pressure Straight Coupling (Cat 7) Description: The PVC Pressure Straight Coupling (Cat 7) is designed for joining two pieces of PVC-U pressure pipe of equal sizes in a straight line. This makes it a simple yet essential fitting for extending pipelines or repairing damaged sections. Made from rigid PVC-U (unplasticised polyvinyl chloride), the coupling provides excellent durability, chemical resistance, and strength under pressure.,PVC Pressure Straight Coupling (Cat 7) Description: The PVC Pressure Straight Coupling (Cat 7) is