Connect 3 in. Drain Waste Vent (DWV)/Schedule 40 (SCH40) pipe to 4 in. Sewer and Drain (S&D) pipe with the PVC Increaser/Reducer Adapter. The drain fitting also connects 3 in. DWV/SCH40 pipe to drainage products compatible with 4 in. S&D connections such as select channel drain outlets, drainage grates, and pop-up emitters. This increaser/reducer adapter is used to connect two different pipe types and sizes. The Increaser/Reducer 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. NDS offers free tools such as the Home Drainage Center, Calculators, and NDS Stormwater Drainage mobile app to help make your project a success. Founded in 1972, NDS is the preferred choice of professionals and the leader in stormwater management solutions with proven products, tools, and support to help you get the job done right. Color: White/Matte.