Polylok's 4" & 6" PVC Elbows makes a 90° turn in 4" or 6" sewer and drain pipe runs. The 90° Elbow also connects to select drainage products compatible with 4" or 6" connections such as Polylok round, square, and atrium drainage grates, as well as Polylok's Flow Gate drainage pop-ups. The drain fitting is made of polyvinyl chloride (PVC) for solvent-weld connections. Meets applicable ASTM standards. For use in non-pressurized underground sewer and drainage applications; maximum working pressure of 5 psi. This elbow is used to make a change in direction in the pipeline and connect two pipes of the same type and diameter size.