WASHINGTON STATE BUILDING CODE CHAPTERS 51-56 and 51-57 WAC UNIFORM PLUMBING CODE and UNIFORM PLUMBING CODE STANDARDS 2009 Edition Washington State Building Code Council Effective July 1, 2010 Copies of the State Building Codes may be obtained from: Washington Association of Building Officials Post Office Box 7310 Olympia, Washington 98507-7310 (888) 664-9515 www.wabo.org/bookstore.htm Complete copies of the 2009 Uniform Plumbing Code as published by the International Association of Plumbing and Mechanical Officials may be obtained from: International Association of Plumbing and Mechanical Officials (800) 85-IAPMO (854-2766) Fax 877 85-CODES http://publications.iapmo.org/ Fourth Edition Titled Uniform Plumbing Code Chapters 51-56/51-57 WAC Effective July 1, 2010 Printed March 2010 Fourth Edition based on WSR 10-03-101/WSR 10-04-003 Preface Authority: The Uniform Plumbing Code (Chapters 51-56 and 51-77 WAC) is adopted by the Washington State Building Code Council pursuant to Chapters 19.27 and 70.92 RCW. This code was first adopted by reference by the Washington State Legislature in 1974. In 1985, the Legislature delegated the responsibility of adoption and amendment of these codes to the State Building Code Council. Supersession of Previous Codes: Chapters 51-56 and 51-57 WAC supersede Chapters 51-46 and 51-47 WAC. Code Precedence: The State Building Code Act, Chapter 19.27 RCW, establishes the following order of precedence among the documents adopted as parts of the State Building Code: International Building Code, Standards and amendments – WAC 51-50; International Residential Code, Standards and amendments – WAC 51-51; International Mechanical Code, Standards and amendments – WAC 51-52; International Fire Code, Standards and amendments – WAC 51-54; Uniform Plumbing Code, Standards and amendments – WAC 51-56, 51-57. Where there is a conflict between codes, an earlier named code takes precedence over a later named code. In the case of conflict between the duct insulation requirements of the International Mechanical Code and the duct insulation requirements of the Energy Code, the Energy Code, or where applicable, a local jurisdiction's energy code, shall govern. Where, in any specific case, different sections of this Code specify different materials, methods of construction or other requirements, the most restrictive shall govern. Where there is conflict between a general requirement and a specific requirement, the specific requirement shall be applicable. Organization and Numbering: These rules are written to allow compatible use with the Uniform Plumbing Code. All sections which are amended, deleted, or added are referenced. Enforcement: The State Building Code Act requires that each local jurisdiction enforce the State Building Code within its jurisdiction. Any jurisdiction can contract with another jurisdiction or an inspection agency to provide the mandated enforcement activities. Amendments to the State Building Code: The State Building Code Council has adopted review procedures and approval criteria for local amendments. These procedures and criteria are found in Chapter 51-04 WAC. The Council has exempted from its review any amendments to the administrative provisions of the various codes. Forms for proposing statewide amendments to the State Building Code are available from the State Building Code Council staff. A. Amendments of Statewide Application: On a yearly basis the State Building Code Council will consider proposals to amend the State Building Code. The Council is not scheduled to enter formal rulemaking until 2012 as part of its consideration of adoption of the 2012 series of codes. Proposals to amend the State Building Code shall be made on forms provided by the Building Code Council. Code Change Proposal Submittal Deadline: March 1st of each year. i B. Local Amendments: Any jurisdiction may amend the State Building Code provided the amendments do not reduce the minimum performance standards of the codes. There are two areas where local amendments are limited or prohibited: Prohibited Amendments: Residential provisions of the State Energy Code (WAC 51-11); any provision of the International Building Code or International Residential Code affecting accessibility; and standards specifically adopted in Chapters 19.27 and 19.27A WAC cannot be amended by any local jurisdiction. Residential Amendments: Amendments by local jurisdictions which affect the construction of single family and multi- family residential buildings must be reviewed and approved by the State Building Code Council before such amendments can be enforced. The State Building Code Act provides the following definition: Multi-family residential building: means common wall residential buildings that consist of four or fewer units, that do not exceed two stories in height, that are less than 5,000 square feet in area, and that have a one-hour fire-resistive occupancy separation between units. Application forms for Council review of local amendments are available from the State Building Code Council Staff. Washington State Building Code Council Post Office Box 42525 Olympia, Washington 98504-2525 www.sbcc.wa.gov (360) 725-2967 Fax (360) 586-9383 e-mail: [email protected] Printing Format: This version of the rules is published as a series of insert or replacement pages. Each page provides instructions for installing them in the model code book. Amendments to the model code which are new or revised from the previous edition of this code are indicated by a line in the margin next to the revised portions. Effective Date: These rules were adopted by the State Building Code Council on November 12, 2009. The rules are effective throughout the state on July 1, 2010. (This version of the code is based on WAC 51-56 and 51-57 as published in WSR 10-03- 110. It is subject to review by the State Legislature during the 2010 session.) Building Permit Fees: The activities of the State Building Code Council are supported by permit fees collected by each city and county. Section 19.27.085 of the State Building Code Act requires that a fee of $4.50 be imposed on each building permit issued by each city and county. In addition, a fee of $2.00 per unit shall be imposed for each dwelling unit after the first unit, on each building containing more than one residential unit. For the purpose of this fee, WAC 365-110-035 defines building permits as any permit to construct, enlarge, alter, repair, move, improve, remove, convert or demolish any building or structure regulated by the Building Code. Exempt from the fee are plumbing, electrical, mechanical permits, permits issued to install a mobile/manufactured home, commercial coach or factory built structure, or permits issued pursuant to the International Fire Code. Each city and county shall remit moneys collected to the state treasury quarterly. No remittance is required until a minimum of $50.00 has accumulated. These permit fees are the amounts current in January 2010. Such fees may be changed by the State Legislature. Opinions: Only at the request of local enforcement officials, the State Building Code Council may issue interpretations/opinions of those provisions of the State Building Code created by the Council, or provisions of the model codes amended by the Council. Final interpretation authority for any specific permit resides with the local enforcement official. ii Table of Contents Section Page WAC 51-56-001 Authority ........................................................................................ A WAC 51-56-002 Purpose ........................................................................................... A WAC 51-56-003 Uniform Plumbing Code ............................................................... A WAC 51-56-007 Exceptions ....................................................................................... A WAC 51-56-008 Implementation .............................................................................. A WAC 51-56-0100 Chapter 1 Administration Section 101 – Title, Scope and General .......................................... 1 Section 102 – Organization and Enforcement ................................. 3 Section 103 – Permits and Inspections ............................................ 3 WAC 51-56-0200 Chapter 2 Definitions Section 205 – C ................................................................................ 12 Section 210 – H ............................................................................... 14 Section 218 – P ................................................................................ 16 WAC 51-56-0300 Chapter 3 General Regulations Section 301 – Materials – Standards and Alternates ....................... 21 Section 311 – Prohibited Fittings and Practices .............................. 23 Section 313 – Protection of Piping, Materials and Structures ......... 24 WAC 51-56-0400 Chapter 4 Plumbing Fixtures and Fixture Fittings Section 402 – Water-Conserving Fixtures and Fittings .................. 29 Section 411 – Floor Drains and Shower Stalls ................................ 32 Section 412 – Minimum Number of Required Fixtures .................. 34 WAC 51-56-0500 Chapter 5 Water Heaters Section 501 – General ..................................................................... 41 Table 5-1 .......................................................................................... 41 Section 502 – Definitions ................................................................ 41 Section 504 – Inspections ................................................................ 42 Section 505 – Prohibited Locations ................................................. 42 Section 506 – Oil-Burning and Other Water Heaters ...................... 43 Section 507 – Air for Combustion and Ventilation ......................... 43 Section 508 – Other Water Heater Installation Requirements ........ 46 Section 510 – Venting of Equipment .............................................. 50 Section 511 – Sizing of Category I Venting System ....................... 65 Section 512 – Direct Vent Equipment ............................................. 70 iii WAC 51-56-0600 Chapter 6 Water Supply and Distribution Section 601 – Hot and Cold Water Required .................................... 107 Section 603 – Cross-connection Control .......................................... 110 Section 604 – Materials .................................................................... 116 Section 608 – Water Pressure, Pressure Regulators, Pressure Relief Valves, and Vacuum Relief Valves ........................ 117 Section 610 – Size of Potable Water Piping .................................... 120 WAC 51-56-0700 Chapter 7 Sanitary Drainage Section 701 – Materials .................................................................... 125 Section 704 – Fixture Connections (Drainage) ................................ 127 Section 710 – Drainage of Fixtures Located Below the Upstream Manhole or Below the Main Sewer Level ....................... 131 Part II – Building Sewers ................................................................. 133 WAC 51-56-0900 Chapter 9 Vents Section 903 – Materials .................................................................... 143 Section 908 – Vertical Wet Venting ................................................ 145 WAC 51-56-1100 Chapter 11 Storm Drainage Section 1101 – General .................................................................... 155 Section 1108 – Controlled Flow Roof Drainage .............................. 158 WAC 51-56-1300 Chapter 13 Health Care Facilities and Medical Gas and Vacuum Systems Section 1309 – Application .............................................................. 218 Section 1313 – System Performance ................................................ 221 Section 1328 – System Verification ................................................. 234 WAC 51-56-1400 Chapter 14 Referenced Standards Section 1401 – Referenced Standards .............................................. 239 WAC 51-56-1400 Chapter 16 Gray Water Systems Section 1601 – Gray Water Systems – General ............................... 269 Section 1613 – Nonpotable Reuse Water Systems – General .......... 280 Section 1614 – Definitions ............................................................... 280 Section 1615 – Permit ...................................................................... 280 Section 1616 – Drawings and Specifications ................................... 280 Section 1617 – Pipe Material/Pipe Identification ............................. 280 Section 1618 – Installation ............................................................... 281 Section 1619 – Signs ........................................................................ 281 Section 1620 – Inspection and Testing ............................................. 282 Section 1621 – Sizing ....................................................................... 282A iv Section 1622 – Abandonment of Nonpotable Reuse Water Systems ...................................................................... 282A Section 1623 – Rainwater Harvesting Systems – General .............. 282A Section 1624 – Scope ...................................................................... 282A Section 1625 – Definitions .............................................................. 282A Section 1626 – Permit ...................................................................... 282B Section 1627 – General Provisions .................................................. 282B Section 1628 – System Components ............................................... 282B Section 1629 – Signs ....................................................................... 282D Section 1630 – Inspection and Testing ............................................ 282D Section 1631 – System Maintenance ............................................... 282D Section 1632 – Abandonment of Nonpotable Reuse Water Systems ...................................................................... 282D WAC 51-57-001 Authority ........................................................................................ B WAC 51-57-002 Purpose ........................................................................................... B WAC 51-57-003 Uniform Plumbing Code Standards ............................................ B WAC 51-57-004 Conflicts Between Appendix I and the Manufacturer’s Installation Instructions ................................................................ B WAC 51-57-007 Exceptions ....................................................................................... B WAC 51-57-008 Implementation .............................................................................. B WAC 51-57-790000 IAPMO IS 7-2003, Polyethylene Cold Water Building Supply and Yard Piping Section 2.6 Materials ...................................................................... 360 WAC 51-57-895000 IAPMO IS 8-2003, PVC Cold Water Building Supply and Yard Piping Section 2.7 Materials ...................................................................... 366 WAC 51-57-202000 IAPMO IS 20-2005, CPVC Solvent Cemented Hot and Cold Water Distribution Systems Section 2.1 Minimum Standards .................................................... 395 v Washington State Amendments CHAPTER 51-56 WAC STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2009 EDITION OF THE UNIFORM PLUMBING CODE WAC 51-56-001 AUTHORITY. WAC 51-56-007 EXCEPTIONS. These rules are adopted under the authority of Chapter The exceptions and amendments to the model codes 19.27 RCW. contained in the provisions of Chapter 19.27 RCW shall apply in cases of conflict with any of the provisions of these rules. WAC 51-56-002 PURPOSE. Codes referenced which are not adopted through RCW The purpose of these rules is to implement the provisions of 19.27.031 or Chapter 19.27A RCW shall not apply unless Chapter 19.27 RCW, which provides that the State Building specifically adopted by the authority having jurisdiction. Code Council shall maintain the State Building Code in a status which is consistent with the purpose as set forth in RCW 19.27.020. In maintaining the codes, the council shall WAC 51-56-008 IMPLEMENTATION. regularly review updated versions of the codes adopted The Uniform Plumbing Code adopted by Chapter 51-56 under the act, and other pertinent information, and shall WAC shall become effective in all counties and cities of amend the codes as deemed appropriate by the Council. this state on July 1, 2010, unless local government residential amendments have been approved by the State Building Code Council. WAC 51-56-003 UNIFORM PLUMBING CODE. The 2009 edition of the Uniform Plumbing Code, published by the International Association of Plumbing and Mechanical Officials, is hereby adopted by reference with the following additions, deletions and exceptions: PROVIDED that Chapters 12 and 15 of this code are not adopted. PROVIDED FURTHER, that those requirements of the Uniform Plumbing Code relating to venting and combustion air of fuel fired appliances as found in Chapter 5 and those portions of the Code addressing building sewers are not adopted. A Effective July 1, 2010 2009 Uniform Plumbing Code Effective July 1, 2010