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Online Education developed by the most experienced and trusted team in the industry.


Journeyman Plumber Licensing & Exam Prep

This page outlines the requirements and abilities of Journeyman Plumbers. Plumber license applicants are required to pass theoretical and practical exams. Once the license is obtained, licensees must complete 16 hours of continuing education prior to each license renewal.

Our exam prep is designed to help you pass your test the first time, and is backed with our no pass, no pay policy. All of our courses are available from almost any device, any time. We hope that you will make RocketCert your home to help you obtain your Washington Plumber License.

In 2021, Washington adopted the 2018 Uniform Plumbing Code via Chapters 51-56 of the WAC. Please see the link near the bottom of the page for a link to the full text.

  • Coming Soon
    Plumber Exam Prep
Individual studying for the Washington Plumber Exam online with RocketCert
Scope of work

What type of work can be done with this license?

Licensed Plumber in Washington
  • Journeyman Plumber

    A Journeyman Plumber is licensed to engage in installing, altering, repairing and renovating potable water systems, liquid waste systems and medical gas piping systems in the footprint of a building.

Requirements & steps

What are the requirements to getting a license?

Plumber License RequirementsJourneyman Plumber
  • Pass the Plumbing Theory and Plumber Practical exams
  • Applicants must also:
    • Have 4 years or more (at least 8,000 hours) working as a plumber trainee under the supervision of a certified journey level plumber
    • Have 2 years or more (at least 4,000 hours) must be spent working in commercial or industrial installations
    • Prior to testing, all applicants are required to take 16 hours of Washington State approved continuing education with a minimum of 4 hours being from the industry related electrical category.

How do I obtain a license?

To apply for your license, contact the Washington State Department of Labor & Industries at 360-902-5207 or visit their website.

16 hours of continuing education is required each licensing period prior to renewal. Washington has reciprocity agreements with Idaho.

With RocketCert, our education is written by a combination of professional educators and industry professionals. Our exam prep is guaranteed to help you pass the exam, and is backed with our no pass, no pay policy. We pride ourselves on providing industry leading customer service. Also, if you find a better original price on any online course that we offer, we will beat it by 10%.

RocketCert customer studying to pass their State exam through the RocketCert website or on the mobile app.

Preparing to pass the State exam is a critical part of the licensing process. Failing the exam can result in substantial delays before you are able to work under your license. We offer industry leading exam prep and all of the required books, at an unbeatable price.


After studying with RocketCert, you will be on your way to passing the required State exam(s) (see below). Contact PSI Exams at 855-746-8173 to begin this process. Testing centers are setup throughout the State in larger cities. Pre-approval is required from the testing agency prior to scheduling the exam


After completing all the steps above, it will be time to apply through Washington State Department of Labor & Industries to obtain your Washington Plumbing License.


Which exam do I need to take?

Applicants may contact PSI Exams at 855-746-8173 or their website.

Journeyman Electrician exam details Journeyman Plumber Exam

Part 1

  • Total Questions: 100
  • Passing Score: 70 correct

Topics include: Washington State Amendments taken from Chapters 1 – 10 and 15, 16 and 17

Part 2

  • A waste and vent pipe sizing drawing based on sizing and design methods from Chapter 7

Part 3

  • A water pipe sizing drawing based on sizing and design methods from Chapter 6
Exam Prep, & Books

How do I pass the exam?

The Washington exams are open book. The references below are permitted to be tabbed, highlighted, and used during your test! Unfortunately, our online course is NOT permitted to be accessed during the State exam.

The exam prep includes math, isometrics, highlighting guides covering the topics your exam is based on, practice questions for each references, and unlimited attempts on our "test simulation".

Online Exam Prep Includes:

  • Isometrics Lessons - Here, we teach you math concepts for sizing water supply pipe, drain pipe, and vent pipe based on drawings.
  • Highlighting Guides - Introduce the critical information in your book(s). This will familiarize you with each book’s content and its layout.
  • Quizzes - These practice quizzes are based on each individual book/reference. They reinforce key concepts.
  • Test Simulation / Practice Exam - Comprehensive exams randomly generated from our database of questions. Test simulations are restricted by time, and hints are disabled. Test simulations are as close to the real exam as you can get.
  • Guide to Tabbing - This section includes tabbing books and other test taking strategies to keep calm and focused during the exam.

2018 Uniform Plumbing Code

See Details


Print for Your Exam:
Amendments to the State Building Code
Free / Online
Pre-printed or blank tabs are also available.

1 Book Tab Bundle

See Details



Permanent Blank Tabs - 375 Pack

See Details


About Us

Why should I choose RocketCert?

At RocketCert, we strive to be the best (while having fun in the process). This means having not only the best quality of education, but also industry leading technology. Best yet, we are here for you 7 days a week. Have a question or comment? Give us a call or contact us to send us a message. Ready to begin? Select from the training below and start immediately. Of course, you can resume later!


Why pay for something knowing your time with it is limited? At RocketCert, we believe in offering lifetime access to your training, even though it will not be needed.


Our education is written industry experts. We believe in helping you with your career, and that help begins with offering best in class education.


We are here for you. Have a question? Need support? Our team is available 7 days a week for technical support. We pride ourselves in taking care of you.


Our training is available 24/7, and you can start and stop as needed. With our mobile ready courses, you can take from nearly any device at any location.