Plumbers, Pipefitters & Steamfitters Salary in Washington

Plumbers, pipefitters, and steamfitters in Washington earn a median salary of $79,070 annually, or $38.02 per hour—significantly higher than the national median of $62,970. Entry-level workers (10th percentile) start around $47,570, while experienced professionals (90th percentile) can earn up to $139,280. The strong union presence in Washington, particularly through the United Association (UA), helps drive wages higher than most states. Pay varies considerably by specialty—steamfitters working in industrial facilities and pipefitters on commercial projects typically earn more than residential plumbers. The Seattle-Tacoma metro area offers the highest wages, though Washington's cost of living is about 7% above the national average. Even accounting for this, Washington plumbers still earn well above average at $73,691 in adjusted dollars. The job market remains strong due to ongoing construction activity, infrastructure upgrades, and the need for skilled workers to maintain existing systems. Union membership, specialized certifications, and willingness to work in industrial or commercial settings significantly impact earning potential in this trade.

Washington requires plumbers to hold a state journeyman license, earned through a 4-5 year apprenticeship program totaling 8,000-10,000 hours of on-the-job training plus classroom instruction. The most common path is through a United Association (UA) apprenticeship with locals like UA Local 32 (Seattle), UA Local 598 (Spokane), or other regional programs. Non-union apprenticeships are also available through the Associated Builders and Contractors (ABC) or individual contractors. During apprenticeship, you'll earn progressively higher wages starting at about 40-50% of journeyman scale and reaching 80-90% by the final year. Washington apprentices typically start around $19-24 per hour and finish near $30-34 per hour. After completing your apprenticeship, you must pass the Washington State journeyman plumber examination administered by the Department of Labor & Industries. The state offers separate specialty endorsements for medical gas systems, backflow assembly testing, and other specializations. Some apprentices also pursue community college programs at schools like South Seattle College or Spokane Community College, which offer related coursework. With approximately 580 training programs available nationally and strong union presence in Washington, finding quality training opportunities is realistic for motivated candidates.

The $91,710 gap between Washington's lowest earners ($47,570) and highest earners ($139,280) reflects significant differences in experience, specialization, and work settings. Entry-level apprentices and residential service plumbers typically fall in the bottom quartile, earning under $59,760. Mid-career journeymen doing mixed residential and commercial work cluster around the median of $79,070. The top 25% earning over $106,100 are usually experienced professionals working industrial or large commercial projects, union members with premium benefits, or those running their own successful contracting businesses. The highest earners ($139,280+) often combine specialized skills—like steam systems, process piping, or medical gas—with supervisory responsibilities or business ownership. Union membership significantly impacts wages, with UA members typically earning 20-30% more than non-union counterparts. Geographic location within Washington matters too, as Seattle-area workers command premium wages compared to rural areas, though cost of living differences partially offset this advantage.