Add a tee intersection in 6 in. sewer and drain SD pipe runs with a 90° branch to 4 in. SD pipe with this PVC Tee. The T fitting connects three lengths of pipe to make 6 in. Hub X Hub X 4 in. Hub connections. It also connects to select drainage products that make 4 in. or 6 in. SD connections. This tee is used to add an intersection to the pipeline and connects two pipes of the same type and diameter size with a 90° branch to a different size pipe. The drain fitting is made of polyvinyl chloride PVC for Hub X Hub X Hub solvent-weld connections. Meets applicable ASTM standards. For use in non-pressurized underground sewer and drainage applications; maximum working pressure of 5 psi. 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.