Plumbing Trade Schools in Washington

It’s a great time to get started in plumbing. In many parts of Washington state older plumbers are retiring and the demand for new skilled labor is driving up wages and job security.

You will need to find the right training course that fits your lifestyle. Online classes let you study at your own pace, and classroom instruction provides hands on knowledge. Below are some accredited schools that combine both elements to help you succeed faster.

Top Plumber Training Schools in Washington

Well-rounded programs combine theoretical knowledge, practical skills, and professional development, preparing graduates for diverse roles in Washington’s plumbing industry.

What You Study in a Plumbing Program in Washington State?

A plumbing program in Washington State provides a comprehensive curriculum that prepares students for careers as plumbing technicians.

Typical areas of study include:

1. Fundamental Plumbing Skills: Courses like PL 110 Introduction to Plumbing and PL 111 Plumbing Fundamentals I cover workplace safety, plumbing history, and essential skills, including fittings for plastic, copper, cast iron, and steel, as well as water distribution systems.
2. Math and Blueprint Reading: Students learn plumbing-specific math and blueprint reading in PL 112 Math & Blueprint Reading I and advance to calculating pipe weights, volumes, and clearances in PL 122 Math & Blueprint Reading II. These skills are critical for designing and interpreting plumbing layouts.
3. Water and Waste Systems: Courses such as PL 120 Waste Systems and PL 130 Water Supply Systems introduce water treatment, pressure systems, hydrostatic pressure, drain grades, and sewer lateral construction.
4. Advanced Plumbing Techniques: Modules like PL 140 Finish and Advanced Plumbing focus on completing home plumbing systems, including installations of toilets, water heaters, and other fixtures, while PL 131 Plumbing Fundamentals III explores circulating pipes and troubleshooting various water heating systems.
5. Externship Opportunities: Hands-on experience is emphasized through externships (PL 142 E Externship), where students gain field experience under agreements with Perry Technical Institute and employers.
6. Professional Development: PL 141 Professional Development teaches communication, soft skills, and career planning for long-term growth in the plumbing industry.
7. Certification and Safety Training: Students can earn industry certifications such as OSHA 10, Medical Gas Certification, Backflow Certification, and UA Foreman Certification, ensuring they meet state and industry standards for safety and technical expertise.
8. Specialized Online Training: Online courses like Water Supply, Drainage, and Electrical Safety Online provide flexibility for learning advanced plumbing topics.

How Do You Become a Plumber in Washington?

Step 1: Go to Plumbing School in Washington

• See options above.

Step 2: Start as a Plumber Trainee:

• Obtain a Plumber Trainee Certificate from the Washington State Department of Labor and Industries (L&I).
• Work under the supervision of a licensed plumber to accumulate necessary experience hours.
• Complete 8 hours of Continuing Education credits each year to renew the trainee certificate.
• If working with pumps and irrigation, hold an electrical trainee card.

Step 3: Gain Experience for Specialized Plumbing Licenses:

• Journey Level Plumber (PL01): Complete 8,000 hours (about 4 years) of work under supervision, covering all plumbing areas; pass the state journey-level exam.
• Residential Plumber (PL02): Complete 6,000 hours (about 3 years) focused on residential plumbing; pass the residential plumber exam.
• Pump and Irrigation Plumber (PL03): Complete 4,000 hours (about 2 years) in pump and irrigation systems; pass the pump and irrigation plumber exam.
• Residential Service Plumber (PL04): Complete 4,000 hours in residential service and repair work; pass the residential service plumber exam.
• Backflow Plumber (PL30): Complete specialized backflow prevention training; obtain the Backflow Assembly Tester (BAT) Certification and pass the backflow plumber exam.

Step 4: Become a Plumbing Contractor:

• Obtain a plumbing license and a contractor’s license from L&I.
• Register your business and meet bonding and insurance requirements.
• Demonstrate experience and ensure compliance with state regulations.

Step 5 Maintain Your Certification:

• Renew certifications every three years, requiring continuing education and paying fees between $156 and $228.
• Complete the necessary continuing education credits to avoid late fees or renewal suspension.

Apprenticeships & Training

To become a licensed plumber, individuals must first obtain a Plumber Trainee Certificate and complete the necessary training hours for their respective license of choice under the supervision of a certified plumber.

Although trainees don’t need any prerequisite work experience to qualify for a Plumber Trainee Certificate, they must complete 8 hours of Continuing Education credits to renew and maintain the license.

The trainee must accumulate the required hours and years of experience necessary to qualify for their desired plumbing license.

Union Plumber Apprenticeships in Washington

The primary union representing plumbers in Washington is the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry (UA). The UA provides comprehensive training programs, protects workers’ rights, and maintains high standards for skilled labor. Local chapters of the UA in Washington include:

• UA Local 32 — Seattle, Washington
• UA Local 44 — Spokane, Washington
• UA Local 598 — Pasco, Washington

To join a UA apprenticeship program, applicants must:

• Be 18 years old.
• Hold a high school diploma or GED.
• Pass an aptitude test.
• Submit official transcripts and complete an interview with the local union office.

Licensed plumbers wishing to join the union must contact the local chapter, provide proof of experience and qualifications, and undergo a background check. Each chapter may have specific requirements, such as residency within their jurisdiction and a valid driver’s license.

Licensing & Certification

The Washington State Department of Labor and Industries (L&I) licenses various skilled trades, including plumbers. All license applications and necessary fees must consequently be submitted to the L&I.

The L&I offers several levels of plumbing licenses, each with specific requirements:

• Plumber Trainee Certificate
• Journey Level Plumber (PL01)
• Residential Plumber (PL02)
• Pump and Irrigation Plumber (PL03)
• Residential Service Plumber (PL04)
• Backflow Plumber (PL30)
• Plumbing Contractor License

The state’s Plumbing Certification Program ensures that plumbers meet the requirements to perform safe plumbing work. This program certifies plumbers after they complete the required hours of on-the-job training and pass the necessary exams.

The L&I’s Plumbing Certification Program certifies plumbers after verifying they’ve completed required training hours and passed exams. The program also randomly inspects job sites to ensure certified plumbers perform work properly and supervise trainees, investigates complaints, and oversees over 6,000 plumbers, 4,000 trainees, and 600 medical gas installers.

Becoming a Plumber Trainee

To become a Plumber Trainee, applicants must:

• Be at least 16 years old.
• Work under the direct supervision of a journey-level or certified plumber.
• Take 8 hours of approved continuing education instruction annually to renew the certificate.
• Possess an electrical trainee card, mainly if working in pump and irrigation specialties.
• This certification allows individuals to work under supervision and accumulate the hours needed for license application later on without prior experience.

Journey Level Plumber License (PL01)

Journey Level Plumbers (PL01) have the broadest scope of work privileges among plumbing licenses in Washington.

They are authorized to:

• Install, repair, and maintain plumbing systems in all buildings, including residential, commercial, and industrial structures.
• Supervise and train plumber trainees and apprentices.
• Work independently without the need for supervision.
• Perform work on all aspects of plumbing systems, including potable water systems, waste and vent systems, and stormwater drainage systems.

To become a Journey Level Plumber (PL01) in Washington, you must complete a rigorous training and certification process.

This includes:

• Completing a minimum of 8,000 hours (approximately 4 years) of documented work experience under the supervision of a certified journey-level plumber. This experience should cover various aspects of plumbing work, including installing, repairing, and maintaining plumbing systems in residential, commercial, and industrial settings.
• Completing approved plumbing training courses may be part of an apprenticeship program offered by trade schools, unions, or employer-sponsored programs.
• Pass the state’s journey-level plumber exam, administered by the Washington State Department of Labor and Industries (L&I). The exam tests your knowledge of plumbing codes, regulations, and practical skills.

Washington Residential Plumber License (PL02)

A Residential Plumber (PL02) is licensed to perform plumbing work specifically in residential settings.

They can:

• Install, repair, and maintain plumbing systems in single-family homes, duplexes, and multi-family residences up to four stories high.
• Work on water supply and distribution systems, sanitary drainage, and vent systems within these residential structures.
• Supervise and train plumber trainees working in residential settings.

To become a Residential Plumber (PL02) in Washington, you must:

• Complete at least 6,000 hours (approximately 3 years) of documented work experience specifically focused on residential plumbing. This includes installing and repairing plumbing systems in single-family homes, duplexes, and multi-family residences.
• Pass the state’s residential plumber exam, which assesses your understanding of residential plumbing codes, practices, and safety standards.

Becoming a Pump and Irrigation Plumber (PL03) in Washington

A Pump and Irrigation Plumber (PL03) is specialized in work related to pumps and irrigation systems. Their privileges include:

• Installation, maintenance, and repair of pump systems for water supply and irrigation purposes.
• Work on both residential and commercial irrigation systems, including agricultural applications.
• Installation and maintenance of pump systems for domestic and industrial use, excluding fire protection systems.

To become a Pump and Irrigation Plumber (PL03) in Washington, you need to:

• Complete 4,000 hours (approximately 2 years) of documented work experience in installing, maintaining, and repairing pumps and irrigation systems.
• Undertake approved training courses specific to pump and irrigation systems.
• Pass the state’s pump and irrigation plumber exam, which evaluates your knowledge of the installation and maintenance of these systems, as well as related plumbing codes and safety practices.

Becoming a Residential Service Plumber (PL04) in Washington

A Residential Service Plumber (PL04) focuses on service and repair work in residential settings.

Privileges of Residential Service Plumbers entail:

• Perform maintenance and repair tasks on existing plumbing systems in single-family homes, duplexes, and multi-family residences up to four stories high.
• Work on fixing leaks, unclogging drains, repairing or replacing fixtures, and other standard service and repair tasks.
• Supervise and train plumber trainees working in residential service and repair.

To become a Residential Service Plumber (PL04) in Washington, the process involves:

• Complete 4,000 hours (approximately 2 years) of documented work experience focusing on residential service and repair plumbing. This includes fixing leaks, unclogging drains, and repairing plumbing fixtures in residential settings.
• Complete state-approved training programs related to residential plumbing service and repair.
• Pass the state’s residential service plumber exam, which tests your practical skills, knowledge of service and repair techniques, and relevant plumbing codes.

Washington Backflow Plumber License (PL30)

A Backflow Plumber (PL30) specializes in backflow prevention, among other specialties:

• Installation, testing, and maintenance of backflow prevention devices.
• Ensuring that potable water supplies are protected from contamination due to backflow incidents.
• Conducting annual inspections and certifications of backflow prevention assemblies as required by state and local regulations.

To become a Backflow Plumber (PL30) in Washington, you must:

• Complete specialized training courses in backflow prevention, which cover installing, testing, and maintaining backflow prevention devices.
• Pass the state’s backflow plumber exam, which assesses your knowledge of backflow prevention principles, devices, and related plumbing codes.
• You must possess an active Backflow Assembly Tester (BAT) Certification, which is distinct from your plumbing license and issued by the Washington State Department of Health.

Washington Plumbing Contractor License

A Plumbing Contractor has the following privileges:

• Operate a plumbing business, employing licensed plumbers, trainees, and apprentices.
• Enter into contracts to provide plumbing services to residential, commercial, and industrial clients.
• Ensure all plumbing work performed under their business complies with state and local plumbing codes and regulations.
• Be responsible for the business aspects of the plumbing operation, including obtaining necessary permits, scheduling inspections, and ensuring proper insurance and bonding are in place.

To become a Plumbing Contractor in Washington, follow these steps:

• Hold a valid plumbing license (e.g., journey-level or specialty plumber certification).
• Obtain a contractor’s license from the Washington State Department of Labor and Industries. This involves registering your business, fulfilling bonding and insurance requirements, and completing additional state-mandated prerequisites.
• Demonstrate relevant experience in the plumbing industry, often including several years of work as a licensed plumber.
• Ensure ongoing compliance with state regulations, including continuing education requirements, business practices, and safety standards.

Washington License Renewals

Plumber certifications renew on your birthdate every three years for journey level, residential, residential service, backflow, and domestic pump and pump and irrigation plumbers.

To renew a plumbing certification online, you will need your 12-digit certification number, Social Security number, an active certification, and proof of continuing education on file with L&I.

If you do not complete your continuing education by your expiration date, late fees will apply, and you will be unable to renew online. Required fees range from $156 to $228 for license renewals. You cannot renew online if you have any outstanding, unpaid plumbing infractions or your certificate is suspended.

Is There Plumber License Reciprocity in Washington?

Washington has a reciprocal agreement for plumbers’ licenses with Idaho exclusively for journey-level plumbers.

Other out-of-state plumbers can present an equivalent license from another state or utilize equivalent military experience for consideration by the Washington State Department of Labor & Industries.

Career Outlook

A recent Seattle Times article highlights the growing opportunities in the plumbing trade, emphasizing its stability and earning potential amid tech industry layoffs. With over 251,000 tech job losses in 2023 alone, the article points to trades like plumbing as attractive alternatives, offering job security and high wages.

The article explains how Tacoma-based journeyman plumber Will Lane earns between $140,000 and $160,000 annually without a college degree.

Apprenticeships, like those offered by Harts Services in Tacoma, provide hands-on training and progressive pay increases, allowing individuals to earn while they learn.

The piece also underscores the demand for plumbers, driven by a shortage of skilled workers as older professionals retire. Apprenticeship programs, requiring up to 8,000 hours of training for full certification, are key to developing the next generation of tradespeople. Featured apprentice Ricky Bui has logged 3,000 hours and sees his training as an opportunity to serve his community. Similarly, programs like Edmonds College’s Construction Pre-Apprenticeship are equipping students with foundational skills to pursue apprenticeships in various trades.

By spotlighting educational initiatives and real-world success stories, the Seattle Times article illustrates how the plumbing trade offers a viable career path with high earning potential and job stability.

What Washington Employers Look for in a Plumber

Plumbing is a vital trade in Washington, with opportunities spanning residential, commercial, and industrial sectors. Employers in the state seek skilled professionals who can work in diverse environments, ensuring high-quality plumbing installations, repairs, and maintenance. Companies like Eco Electric & Plumbing, Day & Nite Plumbing & Heating, Atlas Mechanical Inc., and Best Plumbing Group LLC provide extensive career opportunities for both apprentice and journeyman plumbers. Additionally, plumbing roles often overlap with other disciplines such as HVAC, water treatment, and hydronic heating systems, broadening career prospects for individuals in the trade.

Key Skills and Qualifications

Employers in Washington look for plumbers who possess a mix of technical expertise, hands-on experience, and soft skills to perform effectively in the field. Key qualifications include:

• Plumbing Trainee Certificate (required for apprentices) or a Plumbing License for journeyman roles.
• Familiarity with plumbing codes and regulations to ensure compliance.
• Experience with installing, repairing, and maintaining plumbing systems, including fixtures, pipes, and drainage systems.
• Ability to read and interpret blueprints and technical diagrams.
• Proficiency in using hand and power tools specific to the trade.
• Strong communication skills for interacting with customers and team members.
• Physical stamina to handle the demands of the job, including lifting heavy equipment and working in confined spaces.
• Valid driver’s license and reliable transportation for fieldwork.

Work Expectations and Responsibilities

Employers like Atlas Mechanical Inc. and Best Plumbing Group LLC outline detailed job responsibilities that highlight the daily expectations of a plumber in Washington:

• Assisting in the installation of water and sewer piping.
• Repairing and replacing plumbing fixtures such as sinks, bathtubs, water heaters, and toilets.
• Diagnosing leaks and troubleshooting plumbing issues.
• Reading and following blueprints to ensure proper installation.
• Ensuring compliance with local plumbing codes and safety regulations.
• Maintaining accurate paperwork and job records.
• Keeping work vehicles and tools organized and in good condition.

Career Growth and Cross-Industry Opportunities

Plumbing in Washington is a dynamic field with growth opportunities in related industries. Companies like Day & Nite Plumbing & Heating emphasize career expansion into areas such as:

• HVAC/R (Heating, Ventilation, Air Conditioning, and Refrigeration)
• Water Treatment and Filtration Systems
• Site Drainage and Hydronics
• Sales and Office Management in Plumbing and Construction

Employers support career growth through on-the-job training, industry certifications, and continuing education programs. For instance, Eco Electric & Plumbing prioritizes employee development by providing professional training and weekly skill-building sessions.

Benefits and Compensation

Plumbing employers in Washington offer competitive pay, with apprentice wages ranging from $18 to $40 per hour, depending on experience. Many companies also provide:

• 401(k) matching
• Health, dental, and vision insurance
• Paid time off and holidays
• Signing bonuses and performance incentives
• Company vehicles and tools
• Stable work schedules, including four-day workweeks at some employers

Industry Demands and Future Outlook

The plumbing industry in Washington is growing, with increasing demand for skilled professionals in residential and commercial construction, home renovations, and emergency plumbing services. Employers are actively hiring individuals with strong work ethics, a commitment to safety, and a willingness to learn. With structured apprenticeships leading to journeyman status, plumbing offers a stable and rewarding career path in Washington’s evolving workforce.

For those looking to enter the trade, companies like Best Plumbing Group LLC and Atlas Mechanical Inc. provide excellent training and career development opportunities. Whether transitioning from another trade or starting fresh, Washington’s plumbing industry presents a promising future with room for advancement and specialization.