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Plumbing Contractor Licensure | Professional Certifications
Plumbing Certificate. This course covers basic installation and maintenance of plumbing systems and components. Topics include: safe use of tools,
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WAC 296-17A-0306: - WA.gov
Applies to contractors engaged in plumbing work not covered by another classification (N.O.C.). Work contemplated by this classification includes activities
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Talk:Plumbing - Wikipedia
The contractors and specializations section headings tend to diverge from actual plumbing information. Much of the information in the second paragraph of
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