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Uniform Plumbing Code


Designated as an American National Standard, the Uniform Plumbing Code (UPC) is a model code developed by the International Association of Plumbing and Mechanical Officials (IAPMO) to govern the installation and inspection of plumbing systems as a means of promoting the public's health, safety and welfare.

The UPC is developed using the American National Standards Institute's consensus development procedures. This process brings together volunteers representing a variety of viewpoints and interests to achieve consensus on plumbing practices.

The UPC is designed to provide consumers with safe and sanitary plumbing systems while, at the same time, allowing latitude for innovation and new technologies. The public at large is encouraged and invited to participate in IAPMO’s open consensus code development process. This code is updated every three years. A code development timeline and other relevant information are available at IAPMO’s Website.

The fourth edition to be designated as an American National Standard, the latest UPC includes the following key changes:

(Chapters 16, 17) based upon IAPMO’s Green Plumbing and Mechanical Code Supplement

Chapter 1 — Administration

Chapter 2 — Definitions

Chapter 3 — General Regulations

Chapter 4 — Plumbing Fixtures anid Fixture Fittings

Chapter 5 — Water Heaters

Chapter 6 — Water Supply and Distribution

Chapter 7 — Sanitary Drainage

Chapter 8 — Indirect Wastes

Chapter 9 — Vents

Chapter 10 — Traps and Interceptors

Chapter 11 — Storm Drainage

Chapter 12 — Fuel Piping

Chapter 13 — Health Care Facilities and Medical Gas and Vacuum Systems

Chapter 14 — Referenced Standards

Chapter 15 — Firestop Protection

Chapter 16 — Alternate Water Sources for Nonpotable Applications

Chapter 17 — Nonpotable Rainwater Catchment (Rainwater Harvesting) Systems


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