Now available online, 8" CPVC duct pipe for air handling systems and more. Lightweight material with a higher impact strength and better fire resistance than PVC. Corzan CPVC duct meets ULC S 102.2 requirements. Get a quote today! Size: 8", Material: CPVC, O.D.: 8.625", Wall: .187", Std Length: 10 or 20 ft. Standards: ASTM D1784