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2024 National Standard Plumbing Code Illustrated provides the latest information about common materials, fixtures, devices and equipment systems used or installed in plumbing systems. New to this edition: (i) Appendix G, intended to promote safe and efficient water use in both residential and non-residential buildings, has been updated with revised excerpts from the 2017 Water Efficiency and Sanitation Standard (WEStand); (ii) all new Appendix L was added to address safe and reliable plumbing system requirements for both permanent single tiny houses and tiny house communities.