If you have questions or comments, join the discussion on our LinkedIn forum. From the 2021 UPC Illustrated Training Manual, Chapter 7, SANITARY DRAINAGE 701.2 Drainage Piping. Materials for drainage piping shall be in accordance with one of the referenced standards in Table 701.2 except that: Requirements for drainage and sewer piping will also apply to vent pipe materials. Table 701.2 is a …