How to Get a Plumber Certification (And What You Need to Know First)

⚠️ Certification requirements vary by state. This guide offers general information and is not legal or licensing advice state licensing board, local authorities, or union representatives

Step 1: Earn Your High School Diploma or Equivalent

Most plumbing certification programs require at least a high school diploma or GED. If you’re still in school, focus on classes like:

• Algebra and geometry
• Physics or general science
• Shop or technical education

Having a strong foundation in math and mechanical reasoning will give you a head start. Some states accept college/trade credentials or vocational diplomas in plumbing/geotech fields in lieu of a GED — verify your options in advance.

Step 2: Enroll in a Plumbing Trade Program or Apprenticeship

There are two typical paths:

1. Trade School/Community College

These programs offer classroom training in:

• Pipefitting
• Safety codes
• Blueprint reading
• Water systems

Programs may take 1–2 years and often include some hands-on lab work.

2. Apprenticeship

A plumbing apprenticeship is the most direct path to certification. Apprenticeships usually last 4–5 years and combine:

• Paid on-the-job training under a licensed plumber
• Classroom instruction (often 144+ hours per year)

You can apply through a local union (like the UA), a contractor association, or a state workforce program. Apprenticeship programs often waive tuition and offer paid training, and may also support quicker progression to journeyman status depending on state reciprocity.

💡 Many states require an apprenticeship before you can even apply for certification or licensing.

Step 3: Gain Required Work Experience

To qualify for certification or licensure, most states require a set number of on-the-job training hours. This can range from 4,000 to 10,000 hours depending on the location and certification level (apprentice, journeyman, master).

Make sure your hours are documented and supervised by a licensed plumber.

Step 4: Pass the Certification or Licensing Exam

Once you’ve met your experience or training requirements, you’ll be eligible to take a state exam.

These typically cover:

• Plumbing codes
• Local and national regulations
• Drainage and venting
• Water supply systems
• Jobsite safety

Some states split the exam into written and practical (hands-on) sections.

⚠️ Some states may offer different license levels: Apprentice, Journeyman, and Master. Check which level you qualify for before testing.

Step 5: Submit Application and Background Check

To receive your certification or license, you may also need to:

• Submit an official application
• Pay applicable state or local fees
• Provide proof of work experience or apprenticeship
• Undergo a background check and fingerprinting
• Show proof of liability insurance (for business owners or contractors)

Step 6: Maintain and Renew Certification

Most states require plumbers to renew their certification every 1–3 years. You may need to complete:

• Continuing education (CE) hours
• Updated safety training
• Pay renewal fees

Failing to renew can result in suspended or revoked certification — and the inability to work legally.

Tips for Getting Certified Faster

• Join a registered apprenticeship program — It gets you hands-on training and speeds up your hours.
• Study state codes early — Especially if your state uses its own plumbing code.
• Track your hours — Keep detailed records to avoid delays when applying.
• Ask mentors — Certified plumbers can help you understand your state’s process and requirements.