Connect two lengths of 4 in. Sewer and Drain (S&D) pipes together with the National Diversified Sales 4P05 4" White Hub x Hub PVC S&D Coupling. This coupler also connects 4 in. S&D pipe to select drainage products compatible with 4 in. S&D connections such as channel drain outlets and pop-up emitters. This coupling is used to connect two pipes of the same size and type. The S&D Coupling is made of polyvinyl chloride (PVC) and makes a Hub X Hub solvent-weld connection. Meets applicable ASTM standards. For use in non-pressurized underground sewer and drainage applications; maximum working pressure of 5 psi. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.