The Valterra DWV Elbow Fitting is designed to be installed with the Drain, Waste, or Ventilation (DWV) system in your RV. Built with durable ABS plastic, this fitting meets ASTM-D2661-2011 and CSA B181.1-2011 standards.• Intended for Drain, Waste, and Ventilation (DWV) Systems• Use with 3" piping• 3" dia. slip• Durable ABS plastic construction• IAPMO listed to standards ASTM-D2661-2011 and CSA B181.1-2011 Use with 3"" piping IAPMO listed to standards ASTM-D2661-2011 & CSA B181.1-2011 | Valterra DWV 90 °Elbow RV Sewer Fitting, 3" Hub | ABS Plastic