Connect 4 in. Drain Waste Vent (DWV)/Schedule 40 (SCH40) pipe to 4 in. Sewer and Drain (S&D) pipe with the National Diversified Sales 3P16 4" White DWV/SCH40 Hub x S&D Hub PVC Adapter. The drain fitting also connects 4 in. DWV/SCH40 pipe to select drainage products compatible with 4 in. S&D connections such as channel drain outlets, drainage grates, and pop-up emitters. This adapter is used to connect two different pipe types. The adapter 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.