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Laws & Rules

Boiler laws & rules

Laws and rules pertaining to boilers, water heaters, and unfired pressure vessels can be found in the following:

Washington Administrative Code (WAC) Chapter 296-104 Revised Code of Washington (RCW) Chapter 70.79.

The laws and rules are maintained and updated by the State Office of the Code Reviser (www1.leg.wa.gov).

Download and print our Boilers and Unfired Pressure Vessel Laws Book (1.1 MB PDF) (updated 5/2018).

 


Rule development

2018 rule changes

A 4 percent increase in fees the Washington State Department of Labor & Industries charges for boiler-related services will take effect January 1, 2019.

L&I and the Board of Boiler Rules approved the increase as part of changes to the Washington Administrative Code Chapter 296-104. The changes were adopted November 20 and include new safety code requirements and updates and clarifications to existing rules.

Among the updates:

  • Adopt amendments to the definition of "hot water heater" to clarify existing requirements.
  • Replace the "A" endorsement with authorized inspector commission to align with National Board Inspection Code (NBIC), NB-263 RCI-1 for inspector commissions and endorsements.
  • Adopt amendments to align the rules with the NBIC, current edition, Part 4 for installation, inservice inspection, and repair of pressure relief devices.
  • Adopt the NBIC, current edition, Part 1, as the standard for installation of non-nuclear boilers, unfired pressure vessels and safety devices in the state of Washington.
  • Adopt language to clarify the duties of in-service inspectors in relation to other standards and requirements for which other regulatory agencies have authority or responsibility.
  • Adopt the Uniform Plumbing Code (UPC), Section 608.5 with Washington State amendments as discharge piping requirements for water heaters.
  • Replace Supplement 10 with Supplement 7 for nonnuclear repairs and alterations to align the rule with the NBIC, current edition, Part 3.

What happens next?

  • January 1, 2019: The new rules take effect.

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