WSR 11-05-037



[ Filed February 8, 2011, 4:24 p.m. , effective July 1, 2013 ]

Effective Date of Rule: July 1, 2013.

Purpose: Amendment of the 2009 Edition of the Uniform Plumbing Code, chapter 51-56 WAC.

Citation of Existing Rules Affected by this Order: Amending WAC 51-56-0500.

Statutory Authority for Adoption: RCW 19.27.074 and 19.27.031.

Other Authority: Chapters 19.27 and 34.05 RCW.

Adopted under notice filed as WSR 10-16-032 on July 26, 2010.

Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 0, Amended 0, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.

Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, Amended 1, Repealed 0.

Number of Sections Adopted on the Agency's Own Initiative: New 0, Amended 0, Repealed 0.

Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, Amended 1, Repealed 0.

Number of Sections Adopted Using Negotiated Rule Making: New 0, Amended 0, Repealed 0; Pilot Rule Making: New 0, Amended 0, Repealed 0; or Other Alternative Rule Making: New 0, Amended 1, Repealed 0.

Date Adopted: October 15, 2010.

John C. Cochran

Council Chair


AMENDATORY SECTION(Amending WSR 10-03-101, filed 1/20/10, effective 7/1/10)

WAC 51-56-0500   Chapter 5 -- Water heaters.  

501.0 General. The regulations of this chapter shall govern the construction, location, and installation of fuel burning and other water heaters heating potable water. The minimum capacity for water heaters shall be in accordance with the first hour rating listed in Table 5-1. See the Mechanical Code for combustion air and installation of all vents and their connectors. All design, construction, and workmanship shall be in conformity with accepted engineering practices, manufacturer's installation instructions, and applicable standards and shall be of such character as to secure the results sought to be obtained by this Code. No water heater shall be hereinafter installed which does not comply in all respects with the type and model of each size thereof approved by the authority having jurisdiction. A list of accepted gas appliance standards is included in Table 14-1.

TABLE 5-11,3

Number of Bathrooms 1 to 1.5 2 to 2.5 3 to 3.5
Number of Bedrooms 1 2 3 2 3 4 5 3 4 5 6
First Hour Rating2, Gallons 42 54 54 54 67 67 80 67 80 80 80

Notes: 1The first hour rating is found on the "Energy Guide" label.
2Nonstorage and solar water heaters shall be sized to meet the appropriate first hour rating as shown in the table.
3For replacement water heaters, see Section

502.2 Chimney Delete definition.

502.3 Chimney, Factory-Built Delete definition.

502.4 Chimney, Masonry Delete definition.

502.5 Chimney, Metal
Delete definition.

502.7 Direct Vent Appliance
Delete definition.

502.8 Flue Collar
Delete definition.

502.9 Gas Vent, Type B
Delete definition.

502.10 Gas Vent, Type L Delete definition.

502.12 Vent Delete definition.

502.13 Vent Connector
Delete definition.

502.14 Venting System Delete definition.

504.1 Inspection of Chimneys or Vents. Delete paragraph.

505.1 Location. Water heater installation in bedrooms and bathrooms shall comply with one of the following:

(1) Fuel-burning water heaters may be installed in a closet located in the bedroom or bathroom provided the closet is equipped with a listed, gasketed door assembly and a listed self-closing device. The self-closing door assembly shall meet the requirements of Section 505.1.1. The door assembly shall be installed with a threshold and bottom door seal and shall meet the requirements of Section 505.1.2. All combustion air for such installations shall be obtained from the outdoors in accordance with the International Mechanical Code. The closet shall be for the exclusive use of the water heater.

(2) Water heater shall be of the direct vent type.

506.2 All storage-type water heaters deriving heat from fuels or types of energy other than gas, shall be provided with, in addition to the primary temperature controls, an over-temperature safety protection device constructed, listed, and installed in accordance with nationally recognized applicable standards for such devices and a combination temperature and pressure relief valve.

507.0 Combustion Air. For issues relating to combustion air, see the Mechanical Code.

Sections 507.1 through 507.9 are not adopted.

Sections 508.6 through 508.9 are not adopted.

508.12 Delete entire section.

508.14 Installation in Residential Garages.

(1) Appliances in residential garages and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit shall be installed so that burners, burner-ignition devices and ignition sources are located not less than 18 inches above the floor unless listed as flammable vapor ignition resistant.

(2) Such appliances shall be located or protected so it is not subject to physical damage by a moving vehicle.

(3) When appliances are installed in a separate enclosed space having access only from outside of the garage, such appliances shall be permitted to be installed at floor level, providing the required combustion air is taken from the exterior of the garage.

508.18 Venting of Flue Gases - Delete entire section.

Sections 508.20 through 508.24.5 are not adopted.

510.0 Venting of Equipment. Delete entire section.

511.0 Sizing of Category I Venting Systems. Delete entire section.

512.0 Direct Vent Equipment. Delete entire section.

Chapter 5, Part II is not adopted.

[Statutory Authority: RCW 19.27.074, 19.27.031 and chapters 19.27 and 34.05 RCW. 10-03-101, 51-56-0500, filed 1/20/10, effective 7/1/10. Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, 51-56-0500, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, 51-56-0500, filed 12/17/03, effective 7/1/04; 02-01-114, 51-56-0500, filed 12/18/01, effective 7/1/02.]

Washington State Code Reviser's Office