About the Plumber Certification Program

L&I's plumber certification program assures the plumbing industry of a qualified workforce to ensure safety for consumers, workers and the general public.

Statistically, we:

  • Certify more than 6,000 plumbers.
  • Provide oversight for 3,000 plumber trainees.
  • Provide oversight for 600 medical gas installers.
  • Test an average of 650 plumbers per year.

How we are doing

Addressing the needs of industry and public safety

The plumber certification program continues to grow based on industry needs and the introduction of new safety challenges such as medical gas piping.

Responsive to public policy

The Advisory Board of Plumbers and L&I hold quarterly public meetings to increase public awareness on issues that affect the plumbing industry.

Where we are going

Enhanced public safety through technological enhancements

We're developing hand-held computer systems that enable us to more effectively identify non-certified plumbers who may be performing sub-standard work while in the field.

Improved public awareness of plumber certification laws

We're distributing information via pamphlets (3 MB PDF) and the Internet and extending community outreach to home shows, county fairs and the business community.

Enhanced public/private partnerships

Enhanced stakeholder involvement, including more interaction with the Advisory Board of Plumbers and other industry representatives will ensure a collaborative policy-making process.

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