4-5-110 UNIFORM PLUMBING CODE ADOPTED:

A. ADOPTION:

The 2021 Edition of the Uniform Plumbing Code (UPC), as adopted and amended by the State Building Code Council in chapter 51-56 WAC, as published by the International Association of Plumbing and Mechanical Officials, is adopted by reference with the additions, deletions and exceptions set forth in this section.

B. EXCEPTIONS:

1. Chapter 1, Administration, is not adopted and the Construction Administrative Code, as set forth in RMC 4-5-060, shall be used in place of UPC Chapter 1, Administration.

2. Chapters 12 and 14, Fuel Gas Piping and Firestop Protection, of the Uniform Plumbing Code are not adopted.

3. Those requirements of the Uniform Plumbing Code relating to venting and combustion air of fuel-fired appliances as found in Chapter 5, Water Heaters, and those portions of the code addressing building sewers are not adopted.

C. APPENDICES ADOPTED:

The following appendices of the 2021 Edition of the Uniform Plumbing Code as adopted and amended by the State Building Code Council in chapter 51-56 WAC, as published by the International Association of Plumbing and Mechanical Officials, are also adopted by reference: Appendix A – Recommended Rules for Sizing the Water Supply System; Appendix B – Explanatory Notes on Combination Waste and Vent Systems; Appendix I – Installation Standards for Pex Tubing Systems for Hot- and Cold-Water Distribution; Appendix M – Peak Water Demand Calculator. In addition, Appendix C – Alternate Plumbing Systems, excluding Sections C303.3 and C304.0 through C601.9, is adopted by reference.

D. CONFLICTS

Where a conflict exists between the provisions of Appendix I and the manufacturer’s installation instructions, the conditions of the listing and the manufacturer’s installation instructions shall apply. (Formerly 4-5-100. Ord. 3760, 12-5-1983; Amd. Ord. 4768, 3-8-1999; Ord. 5010, 5-19-2003; Ord. 5085, 6-21-2004; Ord. 5297, 7-2-2007; Ord. 5710, 4-14-2014; Ord. 5810, 7-11-2016; Ord. 6010, 1-25-2021; Ord. 6133, 3-4-2024)