This adapter bushing, Oldcastle Infrastructure V-2664, is designed for transitioning between different types and sizes of non-pressure plumbing pipes. Manufactured from PVC (Polyvinyl Chloride), it connects a 6-inch Standard Dimension Ratio (SDR) pipe to a 4-inch Drain, Waste, Vent (DWV) pipe. SDR 35 pipe, commonly used in sewer applications, refers to the ratio of a pipe's outer diameter to its wall thickness, where a lower SDR indicates a thicker wall. DWV systems are engineered for gravity-fed applications, handling waste and vent flows without internal pressure. The fitting utilizes solvent weld connections, typically featuring a spigot end for insertion into a fitting and a hub end for receiving a pipe. It is suitable for underground sewer and drainage systems with a maximum operating temperature of 140°F (60°C). This type of fitting often complies with standards such as ASTM D2665, ASTM D3034, ASTM F1336, NSF 14, and is CSA, IAPMO, or UPC certified for various application