The 2024 edition of the Uniform Plumbing Code (UPC) represents the most up-to-date standards and best practices in the plumbing industry. This edition is the eighth developed through the ANSI consensus process and is officially recognized as an American National Standard by the American National Standards Institute (ANSI).

The development of this code includes contributions from every sector of the built environment—ranging from consumers, regulatory authorities, installers, service professionals, labor groups, and manufacturers to research organizations, testing laboratories, subject-matter experts, and end users.

The purpose of the UPC is to ensure safe, sanitary, and reliable plumbing systems for consumers, while still supporting innovation and emerging technologies.

Key updates in the 2024 Uniform Plumbing Code include:

• New provisions for tileable shower receptors and kits

• Requirements for temperature-actuated flow reduction devices on individual fixtures

• Updated standards for all-gender facilities, including fixture counts, privacy compartments, and partitions

• New requirements for water supply and distribution manifolds

• Revised provisions for hot-water recirculating systems

• New standards for private well water tanks

• Updated rules for appliance condensate drains when serving multiple appliances through a shared indirect waste pipe

• Enhanced minimum water quality provisions for onsite treated nonpotable water, nonpotable water devices, and harvested rainwater systems

• Revised WSFU (Water Supply Fixture Unit) and DFU (Drainage Fixture Unit) values for bathroom groups in Appendix C

• Appendix O: Minimum standards for non-sewered sanitation systems

• Appendix P: Minimum qualifications for inspectors, examiners, technicians, installers, and administrators

• Appendix Q: Plumbing requirements for indoor horticultural facilities

• Appendix R: Minimum plumbing system requirements for tiny houses

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