Registered apprenticeship · 4 occupations

Seattle Area Plumbers Housing Plumbers Pipefitters HVAC-Service Controls Technician/Refrigeration Mechanics and Marine Pipefitters Apprenticeship Committee

A registered apprenticeship on file with Washington L&I, covering 4 occupations in this trade.

Registration ActiveApplication window Unknown · the registry publishes no application window for any programShop Union

The occupations

Maint Plumber/Steamfitter

Yes, and this program's own registered standards require it: an apprentice here must obtain the Washington journeyman plumber certification before being turned out as a journey-level worker.³

Residential Service Mech

Yes, in part: the hours count toward PL02 and PL04, the residential specialty and residential service plumber classes the licensing page carries.^{3, 4}

Same program, 4 occupations. The registry lists different hours and pay for each.

Occupation	Hours on the job	Pay on day one	Journey rate
Plumber	10,000 hours²	$38.61/hr²	$77.21/hr²
Housing Plumber	6,000 hours²	$36.36/hr²	$66.10/hr²
Maint Plumber/Steamfitter	10,000 hours²	$38.61/hr²	$77.21/hr²
Residential Service Mech	8,000 hours²	$36.36/hr²	$66.10/hr²

The pay steps

You are paid from day one. Washington publishes the first-step rate and the journey rate. Each program sets the wage steps in between.

Plumber

Journey rate$77.21/hr²

Steps between: set by the program, not published

Apprentice, step 1$38.61/hr²

The starting rate is 50% of the journey rate. Both dollar figures are published by the registry.

Housing Plumber

Journey rate$66.10/hr²

Steps between: set by the program, not published

Apprentice, step 1$36.36/hr²

The starting rate is 55% of the journey rate. Both dollar figures are published by the registry.

Maint Plumber/Steamfitter

Journey rate$77.21/hr²

Steps between: set by the program, not published

Apprentice, step 1$38.61/hr²

The starting rate is 50% of the journey rate. Both dollar figures are published by the registry.

Residential Service Mech

Journey rate$66.10/hr²

Steps between: set by the program, not published

Apprentice, step 1$36.36/hr²

The starting rate is 55% of the journey rate. Both dollar figures are published by the registry.

The hours

Plumber

Hours on the job: 10,000 hours²
Classroom hours (RSI): 1,178 hours²
Term: About five years at full-time hoursderived: 10,000 hours at 2,000 working hours a year, which is the figure the state rule uses for a year of a term. The registry states hours, not years.

Housing Plumber

Hours on the job: 6,000 hours²
Classroom hours (RSI): 511 hours²
Term: About three years at full-time hoursderived: 6,000 hours at 2,000 working hours a year, which is the figure the state rule uses for a year of a term. The registry states hours, not years.

Maint Plumber/Steamfitter

Hours on the job: 10,000 hours²
Classroom hours (RSI): 1,080 hours²
Term: About five years at full-time hoursderived: 10,000 hours at 2,000 working hours a year, which is the figure the state rule uses for a year of a term. The registry states hours, not years.

Residential Service Mech

Hours on the job: 8,000 hours²
Classroom hours (RSI): 760 hours²
Term: About four years at full-time hoursderived: 8,000 hours at 2,000 working hours a year, which is the figure the state rule uses for a year of a term. The registry states hours, not years.

Who runs it, where

Registered with: Washington State L&I, Apprenticeship Registration and Tracking System (ARTS)program 115, 4 occupation records
Address on registration: 595 Monster Road SW Suite 100 Renton WA 98057-2946¹

How to apply

Read the program's own listing

The registry's listing for this program lists its current contact and any requirements the program adds on top of the state's. Open it on L&I ARTS⁵.

Ask when the window opens

Programs recruit on their own calendars. Use the contact in the registry's listing to ask when applications open. Until a source publishes an application window, we show it as Unknown.

See how it counts toward the state license

Washington licenses this work separately from the apprenticeship, and the hours you work in this program count toward its experience requirement. The Washington plumber licensing page lists the fee, the application form and the exam.

Sources

https://data.wa.gov/resource/4mxd-hz2q.jsonread 2026-08-19
https://data.wa.gov/resource/6zih-i79k.jsonread 2026-08-19
https://www.lni.wa.gov/licensing-permits/apprenticeship/_docs/0115.pdfread 2026-08-20
https://app.leg.wa.gov/WAC/default.aspx?cite=296-400A-121read 2026-08-19
https://secure.lni.wa.gov/arts-public/#/program-details?programId=115read 2026-08-19

Washington L&I republishes this registry monthly. Every figure above is the registry’s own, read on the day beside it.