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State of Washington Classified Job Specification


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Class Code: 621H
Category: Maintenance Trades & Labor


Supervises plumbers and/or steamfitters and performs skilled plumbing and/or steamfitting work; 


Directs a crew of inmates of correctional institutions, and performs skilled plumbing and/or steamfitting work.

Distinguishing Characteristics

In the Department of Corrections, positions at this level directing a crew of inmates either are limited to two positions per institution or must direct crews consisting of three or more inmates.

Typical Work

Plans, lays out, directs and inspects work of crew of plumbers/steamfitters and helpers or crew of inmates engaged in installation, maintenance and repair of steam systems and equipment such as boilers, pipes, radiators, pumps, traps, valves, and laundry and kitchen equipment;

Performs skilled plumbing or steamfitting work;

Keeps records; makes reports;

Plans, lays out, directs and inspects work of crew of plumbers and helpers or crew of inmates engaged in installing, maintaining and repairing water, refrigeration and sewage systems;

Recommends repairs and consults with supervisors and others on projects; determines material and personnel requirements;

Performs other work as required.

Knowledge and Abilities

Knowledge of: standard practices, methods, materials, tools and equipment of the plumbing or steamfitting  trade; operation and maintenance of steam power plant machinery, fluid and gas systems; boiler laws; safety precautions; record‑keeping.

Ability to: read, interpret and work from blueprints, plans and sketches; estimate materials and personnel needed to complete project; supervise crew of plumbers, steamfitters or inmates.

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 full time journey‑level work as a plumber or steamfitter.

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

Note: Incumbents in some positions in this class 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 Social and Health Services. These certificates are required by the Safe Drinking Water Act of December 1974, which became law effective January 1, 1978.

Class Specification History

New class consolidates 5427 Plumber/Pipefitter/Steamfitter Supervisor, 70220 Plumber Supervisor, 70220 Steamfitter Supervisor; adopted May 10, 2007, effective July 1, 2007