CPVC duct is a popular option for those seeking a durable material to handle their air system. CPVC can stand temperatures up to 200 degrees F and is available in sizes up to 60 inches! It's easy to handle and quick to install. Get a quote today and see how CPVC duct could benefit your next project. Size: 12", Material: CPVC, O.D.: 12.750", Wall: .187", Std Length: 10 or 20 ft. Standards: ASTM D1784