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State of Washington Classified Job Specification


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Class Code: 621G
Category: Maintenance Trades & Labor


Leads and performs journey-level plumbing, steamfitting, and/or pipe fitting work.

Distinguishing Characteristics

Positions in this class are distinguished by the responsibility to assign and lead work at a project or job location, to instruct other assigned plumbers, to correct and specify methods, and to perform plumbing, steam fitting, and pipe fitting work.

Positions performing plumbing, steamfitting or pipe fitting work as defined under WAC 296-400A-005 (to include potable water systems, liquid waste systems, and medical gas piping systems within the footprint of a building) require proper plumber certification unless meeting an exemption under RCW 18.106.150.

Typical Work

Perform all duties of a plumber/pipefitter/steamfitter;

Lead assigned personnel in the performance of work;

Assure adherence to safety rules and precautions by assigned personnel;

Develop preliminary cost estimates for installation, construction, and repairs;

Develop methods and procedures to be followed by assigned personnel;

May perform work in other trades;

Perform related duties as required.

Knowledge and Abilities

Knowledge of: standard practices, methods, materials, tools, and equipment of plumbing, pipefitter, or steamfitter trades; kinds, uses, and qualities of fixtures; safety precautions.

Ability to: work from blueprints, plans, and sketches; estimate materials and time needed to complete jobs; use hand and power tools.

Legal Requirement(s)

There may be instances where individual positions must have additional licenses or certification. It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Desirable Qualifications

Two years of experience as a journey-level plumber/pipefitter/steamfitter.

• Some positions may require a valid motor vehicle driver’s license.

• Some positions performing plumbing work as defined under WAC 296-400A-005 requires current Washington State PL01 License/Certificate issued by the Department of Labor and Industries.

• Some positions will be required to obtain and maintain a Water Distribution Manager Certificate of Competency and/or Water Treatment Plant Operator Certificate of Competency issued by the Department of Health. These certificates are required by the Safe Drinking Water Act of December 1974, effective January 1, 1978.

Class Specification History

New class adopted January 1, 1973.
Revise class. Revises minimum qualifications; adopted July 2, 1990.
Revise class. Revises class code (formerly 5428), general revision; adopted May 10, 2007, effective July 1, 2007.
Revised distinguishing characteristics and desirable qualifications; adopted June 22, 2023, effective July 1, 2023.