Install and repair water supply lines, drainage systems, gas lines, and fixtures. Plumbers work in residential and commercial settings ensuring safe water and waste systems.
Median annual salary by experience level in Washington
Apprentice
$40,800
$36,720 - $46,920
Journeyman
$67,200
$60,480 - $77,280
Master
$93,600
$84,240 - $107,640
Business Owner
$150,000
$135,000 - $172,500
Steps to advance your Plumber career in Washington
Certification data for this trade in Washington is not yet available.
Sample questions for Plumber journeyman certification
1.What is the minimum slope for a horizontal drain pipe 3 inches or less?
2.What is a P-trap used for?
3.What is the standard rough-in height for a toilet flange?
More practice questions available
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Unlock All QuestionsJourneyman Plumber salary by state
Source: BLS/Industry Survey
Updated: 3/16/2026
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